Reading shelf

1643 passages with questions and an answer key, 1643 of them at three levels. Find one by topic and grade.

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1643 passages.

Passage	Grade	Topic	Words	Copies
A Cactus in the Desert	Kindergarten	how a cactus lives, nonfiction	51	● ▲ ■ three copies (PDF)
A Canoe Made from One Log	Kindergarten	dugout canoes, nonfiction	53	● ▲ ■ three copies (PDF)
A Dog Groomer Makes Pups Fluffy	Kindergarten	dog groomers, nonfiction	57	● ▲ ■ three copies (PDF)
A Duck Stays Dry	Kindergarten	duck feathers and feet, nonfiction	46	● ▲ ■ three copies (PDF)
A Hat, Shades and Shade on a Sunny Day	Kindergarten	sun safety, nonfiction	84	● ▲ ■ three copies (PDF)
A Hiccup in the Library	Kindergarten	a bunny with the hiccups, fiction	55	● ▲ ■ three copies (PDF)
A Hum Tickles Your Neck	Kindergarten	humming and voice, nonfiction	55	● ▲ ■ three copies (PDF)
A Letter Rides in a Mailbag	Kindergarten	letters before email, nonfiction	52	● ▲ ■ three copies (PDF)
A Library Card Promise	Kindergarten	borrowing library books, nonfiction	57	● ▲ ■ three copies (PDF)
A Locksmith Copies a Key	Kindergarten	locksmiths, nonfiction	57	● ▲ ■ three copies (PDF)
A Map of My Room from Up Above	Kindergarten	bird's-eye maps, nonfiction	57	● ▲ ■ three copies (PDF)
A Ramp for Toy Cars	Kindergarten	ramps, nonfiction	53	● ▲ ■ three copies (PDF)
A Rowboat to Pebble Island	Kindergarten	a boat trip to a small island, fiction	68	● ▲ ■ three copies (PDF)
A Seed Wakes Up	Kindergarten	how a seed sprouts, nonfiction	50	● ▲ ■ three copies (PDF)
A Shadow Tells the Time	Kindergarten	the sundial, nonfiction	59	● ▲ ■ three copies (PDF)
A Snail Packs Its House	Kindergarten	snails and shells, nonfiction	45	● ▲ ■ three copies (PDF)
A Strawberry Wears Its Seeds	Kindergarten	strawberry seeds, nonfiction	56	● ▲ ■ three copies (PDF)
An Island Has Water All Around	Kindergarten	islands, nonfiction	59	● ▲ ■ three copies (PDF)
Apples on the Tree	Kindergarten	how fruit grows, nonfiction	43	● ▲ ■ three copies (PDF)
Bat Hangs Out with Friends	Kindergarten	a bat who feels alone upside down, fiction	54	● ▲ ■ three copies (PDF)
Beaver Builds a Stick Dam	Kindergarten	how beavers build, nonfiction	47	● ▲ ■ three copies (PDF)
Bees Visit the Flowers	Kindergarten	bees and flowers, nonfiction	53	● ▲ ■ three copies (PDF)
Before Light Bulbs, There Were Candles	Kindergarten	candles for light, nonfiction	54	● ▲ ■ three copies (PDF)
Ben Saves for a Green Kite	Kindergarten	saving money a little at a time, nonfiction	59	● ▲ ■ three copies (PDF)
Ben's Backwards Day	Kindergarten	a day where everything is backwards, fiction	63	● ▲ ■ three copies (PDF)
Birds Have Feathers	Kindergarten	birds, nonfiction	42	● ▲ ■ three copies (PDF)
Blast Off with the Countdown	Kindergarten	how a rocket launches, nonfiction	47	● ▲ ■ three copies (PDF)
Bo and the Whistle That Wouldn't	Kindergarten	learning to whistle, fiction	60	● ▲ ■ three copies (PDF)
Brush, Brush, Brush	Kindergarten	healthy teeth, nonfiction	44	● ▲ ■ three copies (PDF)
Churning Cream into Butter	Kindergarten	making butter by hand, nonfiction	61	● ▲ ■ three copies (PDF)
Clap It Back: The Echo Game	Kindergarten	rhythm echo game, nonfiction	62	● ▲ ■ three copies (PDF)
Clay Gets Hard in the Air	Kindergarten	making a clay pinch pot, nonfiction	65	● ▲ ■ three copies (PDF)
Click! Inside a Flashlight	Kindergarten	how a flashlight works, nonfiction	40	● ▲ ■ three copies (PDF)
Clues in the Snow Garden	Kindergarten	tracks and clues in snow, fiction	67	● ▲ ■ three copies (PDF)
Crab's Crooked Walk	Kindergarten	a crab who walks sideways, fiction	53	● ▲ ■ three copies (PDF)
Dad Says Pickle for Pillow	Kindergarten	a dad who mixes up words, fiction	65	● ▲ ■ three copies (PDF)
Day and Night	Kindergarten	the Earth and sun, nonfiction	48	● ▲ ■ three copies (PDF)
Dents on the Moon	Kindergarten	moon craters, nonfiction	48	● ▲ ■ three copies (PDF)
Dev Joins the Kazoo Band	Kindergarten	a first music try, fiction	54	● ▲ ■ three copies (PDF)
Dolls from Ancient Egypt	Kindergarten	toys in ancient Egypt, nonfiction	57	● ▲ ■ three copies (PDF)
Dot the Tiny Robot and the Moss Lawn	Kindergarten	a tiny robot in the moss, fiction	67	● ▲ ■ three copies (PDF)
Dough That Puffs Up in the Bowl	Kindergarten	how bread dough rises, nonfiction	51	● ▲ ■ three copies (PDF)
Fixing a Flat Bike Tire	Kindergarten	bike mechanics, nonfiction	58	● ▲ ■ three copies (PDF)
Fluff the Cloud Who Collects Puddles	Kindergarten	a cloud that collects puddles, fiction	61	● ▲ ■ three copies (PDF)
From a Mountain Drip to the Sea	Kindergarten	how a river flows, nonfiction	49	● ▲ ■ three copies (PDF)
Grandpa's Bean as Big as a Barn	Kindergarten	a tall tale about a huge bean, fiction	59	● ▲ ■ three copies (PDF)
Grandpa's Squeaky Shoes	Kindergarten	a grandpa with loud shoes, fiction	59	● ▲ ■ three copies (PDF)
Grow a Bean in a Cup	Kindergarten	planting a bean, nonfiction	59	● ▲ ■ three copies (PDF)
Half a Sandwich Each	Kindergarten	sharing in halves, nonfiction	61	● ▲ ■ three copies (PDF)
Hand Prints on a Cave Wall	Kindergarten	cave paintings, nonfiction	54	● ▲ ■ three copies (PDF)
Hattie Hen Lays a Square Egg	Kindergarten	a hen and a square egg, fiction	57	● ▲ ■ three copies (PDF)
Hedgehog's Itchy Hat	Kindergarten	a hedgehog and a knit hat, fiction	53	● ▲ ■ three copies (PDF)
Hermit Crab Needs a Bigger Shell	Kindergarten	hermit crabs, nonfiction	48	● ▲ ■ three copies (PDF)
Heron Does Not Rush the Fish	Kindergarten	a heron learns to be still, fiction	48	● ▲ ■ three copies (PDF)
Hiccups: The Jumpy Hic! in Your Chest	Kindergarten	hiccups, nonfiction	70	● ▲ ■ three copies (PDF)
Hot and Cold	Kindergarten	temperature, nonfiction	45	● ▲ ■ three copies (PDF)
Houses on Tall Legs Over the Water	Kindergarten	stilt houses, nonfiction	54	● ▲ ■ three copies (PDF)
How a Scab Covers a Scrape	Kindergarten	healing a scrape, nonfiction	78	● ▲ ■ three copies (PDF)
How an Umbrella Pops Open	Kindergarten	umbrella, nonfiction	48	● ▲ ■ three copies (PDF)
How Many Legs?	Kindergarten	counting animals, nonfiction	43	● ▲ ■ three copies (PDF)
Juice Turns Hard in the Freezer	Kindergarten	freezing juice into pops, nonfiction	59	● ▲ ■ three copies (PDF)
Leaves Change Color	Kindergarten	leaves in fall, nonfiction	52	● ▲ ■ three copies (PDF)
Lemon Makes a Sour Face	Kindergarten	the sour taste, nonfiction	52	● ▲ ■ three copies (PDF)
Little Bumps on Your Tongue	Kindergarten	taste buds, nonfiction	68	● ▲ ■ three copies (PDF)
Long Bars and Short Bars	Kindergarten	xylophone sounds, nonfiction	46	● ▲ ■ three copies (PDF)
Lulu Chases the Beanbag Throw	Kindergarten	practicing a throw, fiction	56	● ▲ ■ three copies (PDF)
Mack's Big Sneeze and the Flying Hats	Kindergarten	a sneeze that blows hats off, fiction	72	● ▲ ■ three copies (PDF)
Mars Is Rusty Red	Kindergarten	why mars looks red, nonfiction	58	● ▲ ■ three copies (PDF)
Max and the Hiccup Baby	Kindergarten	a new baby sister with hiccups, fiction	72	● ▲ ■ three copies (PDF)
Measuring My Boot with Paper Clips	Kindergarten	measuring with small things, nonfiction	62	● ▲ ■ three copies (PDF)
Mina Waters the Bean Cups	Kindergarten	a plant chore at school, fiction	57	● ▲ ■ three copies (PDF)
Moon Boots and Moon Footprints	Kindergarten	footprints on the moon, nonfiction	54	● ▲ ■ three copies (PDF)
Mushrooms Are Not Plants	Kindergarten	mushrooms and fungi, nonfiction	54	● ▲ ■ three copies (PDF)
My Cat Mim	Kindergarten	animals, fiction	38	● ▲ ■ three copies (PDF)
My Five Senses	Kindergarten	the body, nonfiction	36	● ▲ ■ three copies (PDF)
Naming the Class Fish by Vote	Kindergarten	voting to choose a name, nonfiction	62	● ▲ ■ three copies (PDF)
Nana's Button Jar	Kindergarten	a grandma's jar of buttons, fiction	76	● ▲ ■ three copies (PDF)
Nib the Robot and the Squeaky Wheel	Kindergarten	a robot with a squeaky wheel, fiction	58	● ▲ ■ three copies (PDF)
Nina and the Stuck Zipper	Kindergarten	zipping a coat, fiction	58	● ▲ ■ three copies (PDF)
One Hand Up, One Voice at a Time	Kindergarten	why classes raise hands, nonfiction	61	● ▲ ■ three copies (PDF)
Otis Wins the Sock Match	Kindergarten	a chore with socks, fiction	63	● ▲ ■ three copies (PDF)
Otter and the Last Smooth Stone	Kindergarten	an otter shares a stone, fiction	53	● ▲ ■ three copies (PDF)
Over and Under Paper Weaving	Kindergarten	paper weaving, nonfiction	67	● ▲ ■ three copies (PDF)
Owl Wakes Up at Night	Kindergarten	owls at night, nonfiction	45	● ▲ ■ three copies (PDF)
Peanuts Hide Below the Dirt	Kindergarten	how peanuts grow, nonfiction	53	● ▲ ■ three copies (PDF)
Penguin Dad Keeps the Egg Warm	Kindergarten	emperor penguin dads, nonfiction	51	● ▲ ■ three copies (PDF)
Pickers Twist Apples Off the Branch	Kindergarten	orchard pickers, nonfiction	55	● ▲ ■ three copies (PDF)
Pip and the Moon Door	Kindergarten	a mouse and a round door, fiction	68	● ▲ ■ three copies (PDF)
Pip and the Puddle Bridge	Kindergarten	a snail and a wide puddle, fiction	50	● ▲ ■ three copies (PDF)
Pip Finds a Nest	Kindergarten	finding a home, fiction	47	● ▲ ■ three copies (PDF)
Pip Pumps the Swing	Kindergarten	learning to swing, fiction	55	● ▲ ■ three copies (PDF)
Pip the Dragon Sneezes Bubbles	Kindergarten	a dragon with a bubble sneeze, fiction	59	● ▲ ■ three copies (PDF)
Pip the Pup Gets a Big Yawn	Kindergarten	yawning, nonfiction	71	● ▲ ■ three copies (PDF)
Pru the Pig and the Boot Hat	Kindergarten	a pig who wears a boot on her head, fiction	70	● ▲ ■ three copies (PDF)
Rain	Kindergarten	weather, nonfiction	39	● ▲ ■ three copies (PDF)
Raking Leaves for Two Coins	Kindergarten	earning money by working, nonfiction	63	● ▲ ■ three copies (PDF)
Red, Blue, Red, Blue Socks	Kindergarten	patterns in socks, nonfiction	62	● ▲ ■ three copies (PDF)
Red, Yellow, Green: The Light Rules	Kindergarten	traffic light colors, nonfiction	49	● ▲ ■ three copies (PDF)
Rice Plants Stand in Wet Fields	Kindergarten	how rice grows, nonfiction	57	● ▲ ■ three copies (PDF)
Rocks in Ravi's Pocket	Kindergarten	collecting rocks, fiction	55	● ▲ ■ three copies (PDF)
Rosa Needs a Wobbly Tooth Friend	Kindergarten	a friend with a wiggly tooth, fiction	65	● ▲ ■ three copies (PDF)
Saturn Wears a Ring Hat	Kindergarten	saturn and its rings, nonfiction	48	● ▲ ■ three copies (PDF)
Saving the Seat by the Window	Kindergarten	a new kid on the school bus, fiction	70	● ▲ ■ three copies (PDF)
Seahorse Dad Has a Pouch	Kindergarten	seahorse fathers, nonfiction	50	● ▲ ■ three copies (PDF)
Seeds Inside the Shaker	Kindergarten	homemade shakers, nonfiction	49	● ▲ ■ three copies (PDF)
Shake the Jar and Make Butter	Kindergarten	making butter from cream, nonfiction	51	● ▲ ■ three copies (PDF)
Shooting Stars Are Tiny Rocks	Kindergarten	meteors, nonfiction	72	● ▲ ■ three copies (PDF)
Shoveling the Snow Next Door	Kindergarten	helping a neighbor, fiction	62	● ▲ ■ three copies (PDF)
Sleeping Bags on the Wall	Kindergarten	how astronauts sleep, nonfiction	47	● ▲ ■ three copies (PDF)
Snip! Two Blades Make Scissors	Kindergarten	scissors, nonfiction	57	● ▲ ■ three copies (PDF)
Snow on Top, Flowers at the Bottom	Kindergarten	mountains, nonfiction	53	● ▲ ■ three copies (PDF)
Soap, Scrub, Rinse, Then Cook	Kindergarten	washing hands before cooking, nonfiction	60	● ▲ ■ three copies (PDF)
Sounds I Hear	Kindergarten	the sense of hearing, nonfiction	42	● ▲ ■ three copies (PDF)
Squeeze the Triangle and It Stops	Kindergarten	triangle instrument, nonfiction	52	● ▲ ■ three copies (PDF)
Stars Hide in the Daytime	Kindergarten	stars in the day, nonfiction	53	● ▲ ■ three copies (PDF)
Sunflower Faces	Kindergarten	sunflowers, nonfiction	55	● ▲ ■ three copies (PDF)
Tally Marks for Snack Day	Kindergarten	counting votes with tally marks, nonfiction	59	● ▲ ■ three copies (PDF)
Ten Extra Minutes at Bedtime	Kindergarten	a clock that adds minutes, fiction	64	● ▲ ■ three copies (PDF)
The Camel's Hump	Kindergarten	camels in the desert, nonfiction	51	● ▲ ■ three copies (PDF)
The Carrot Is a Root	Kindergarten	roots we eat, nonfiction	56	● ▲ ■ three copies (PDF)
The Case of the Wet Footprints	Kindergarten	a puzzle of wet footprints, fiction	71	● ▲ ■ three copies (PDF)
The Crayon That Drew Doors	Kindergarten	a crayon that draws doors, fiction	64	● ▲ ■ three copies (PDF)
The Crossing Guard's Bright Vest	Kindergarten	a school crossing guard, nonfiction	53	● ▲ ■ three copies (PDF)
The Dragon Who Toasted Bread	Kindergarten	a dragon that toasts bread, fiction	71	● ▲ ■ three copies (PDF)
The Ferry Captain Crosses the Bay	Kindergarten	ferry captains, nonfiction	57	● ▲ ■ three copies (PDF)
The Florist Ties Up a Bunch	Kindergarten	florists, nonfiction	47	● ▲ ■ three copies (PDF)
The Garbage Truck Visits on Tuesday	Kindergarten	trash and recycling pickup, nonfiction	59	● ▲ ■ three copies (PDF)
The Giraffe's Long Blue Tongue	Kindergarten	how a giraffe eats, nonfiction	43	● ▲ ■ three copies (PDF)
The Goat Who Counted Clouds	Kindergarten	a goat and a rainy hill, fiction	53	● ▲ ■ three copies (PDF)
The Hopping Button on Kit's Coat	Kindergarten	a button that makes you hop, fiction	69	● ▲ ■ three copies (PDF)
The Humming Closet	Kindergarten	a strange sound in a closet, fiction	62	● ▲ ■ three copies (PDF)
The Ice Block in the Icebox	Kindergarten	keeping food cold before fridges, nonfiction	48	● ▲ ■ three copies (PDF)
The Ice Rink Driver Makes a Mirror	Kindergarten	ice rink workers, nonfiction	61	● ▲ ■ three copies (PDF)
The Key in the Flour Jar	Kindergarten	finding a hidden key, fiction	71	● ▲ ■ three copies (PDF)
The Lost and Found Box	Kindergarten	returning lost things, fiction	59	● ▲ ■ three copies (PDF)
The Lunchbox That Went Quiet	Kindergarten	a lunchbox gone missing at school, fiction	68	● ▲ ■ three copies (PDF)
The Map Drawn in Mud	Kindergarten	a treasure map made with a stick, fiction	66	● ▲ ■ three copies (PDF)
The Map Key That Shows the Slide	Kindergarten	map symbols, nonfiction	61	● ▲ ■ three copies (PDF)
The Mole Who Wanted a Window	Kindergarten	a mole and a sunny hole, fiction	56	● ▲ ■ three copies (PDF)
The Moon in Bo's Pocket	Kindergarten	a tiny moon that glows, fiction	66	● ▲ ■ three copies (PDF)
The Moon Is a Mirror	Kindergarten	moonlight comes from the sun, nonfiction	61	● ▲ ■ three copies (PDF)
The Moth and the Porch Lamp	Kindergarten	a moth and the moon, fiction	57	● ▲ ■ three copies (PDF)
The Moving Box Fort	Kindergarten	a new home and a new neighbor, fiction	75	● ▲ ■ three copies (PDF)
The Night Light Trade	Kindergarten	sharing a room with a sibling, fiction	70	● ▲ ■ three copies (PDF)
The Night the Porch Light Blinked	Kindergarten	a blinking light and a moth, fiction	66	● ▲ ■ three copies (PDF)
The One-Wheel Dirt Cart	Kindergarten	wheelbarrow, nonfiction	46	● ▲ ■ three copies (PDF)
The Pancake That Rolled to the Pond	Kindergarten	a runaway pancake, fiction	71	● ▲ ■ three copies (PDF)
The Pickle Swap	Kindergarten	trading lunch foods with a friend, fiction	65	● ▲ ■ three copies (PDF)
The Pinwheel Wants Wind	Kindergarten	pinwheel and wind, nonfiction	47	● ▲ ■ three copies (PDF)
The Plumber Turns the Water Off First	Kindergarten	plumbers, nonfiction	55	● ▲ ■ three copies (PDF)
The Puddle Rule	Kindergarten	two friends mixing their game rules, fiction	71	● ▲ ■ three copies (PDF)
The Quick Blink: Eyes That Wash Themselves	Kindergarten	blinking, nonfiction	80	● ▲ ■ three copies (PDF)
The Red Kite	Kindergarten	flying a kite, fiction	39	● ▲ ■ three copies (PDF)
The Sand Timer Teeth Race	Kindergarten	telling how much time passes, nonfiction	65	● ▲ ■ three copies (PDF)
The Seesaw Knows Which Is Heavier	Kindergarten	comparing heavy and light, nonfiction	62	● ▲ ■ three copies (PDF)
The Shadow Duck on the Wall	Kindergarten	hand shadow puppets, nonfiction	59	● ▲ ■ three copies (PDF)
The Shearer Gives a Sheep a Haircut	Kindergarten	sheep shearers, nonfiction	55	● ▲ ■ three copies (PDF)
The Sock in Nan's Soup	Kindergarten	a lost sock in a pot, fiction	63	● ▲ ■ three copies (PDF)
The Tiny Dime Is Worth More	Kindergarten	coins and their value, nonfiction	61	● ▲ ■ three copies (PDF)
The Tow Truck Rescues a Stuck Car	Kindergarten	tow truck drivers, nonfiction	60	● ▲ ■ three copies (PDF)
The Tower That Fell Nine Times	Kindergarten	building with blocks, fiction	55	● ▲ ■ three copies (PDF)
The Town Inside the Teacup	Kindergarten	a tiny town in a teacup, fiction	66	● ▲ ■ three copies (PDF)
The Town Where the Streets Are Water	Kindergarten	a city of canals, nonfiction	53	● ▲ ■ three copies (PDF)
Three Flat Breads, Three Kitchens	Kindergarten	breads from other places, nonfiction	60	● ▲ ■ three copies (PDF)
Tilly the Cat Says Moo	Kindergarten	animals that swap sounds, fiction	58	● ▲ ■ three copies (PDF)
Tiny Tiles Make a Big Picture	Kindergarten	mosaic art, nonfiction	58	● ▲ ■ three copies (PDF)
Tortoise and the Big Green Leaf	Kindergarten	a tortoise carries a leaf, fiction	58	● ▲ ■ three copies (PDF)
Two Mittens, Four Hands	Kindergarten	sharing mittens on a cold day, fiction	73	● ▲ ■ three copies (PDF)
Up and Down on the Seesaw	Kindergarten	seesaw and balance, nonfiction	55	● ▲ ■ three copies (PDF)
Wash Day and the Washboard	Kindergarten	washing clothes by hand, nonfiction	48	● ▲ ■ three copies (PDF)
Wax Pushes the Paint Away	Kindergarten	crayon resist painting, nonfiction	58	● ▲ ■ three copies (PDF)
What a Fridge Magnet Can Hold	Kindergarten	magnets, nonfiction	55	● ▲ ■ three copies (PDF)
What Roots Do	Kindergarten	plant roots, nonfiction	53	● ▲ ■ three copies (PDF)
What Your Eyebrows Do All Day	Kindergarten	eyebrows, nonfiction	76	● ▲ ■ three copies (PDF)
Wheat Becomes Bread	Kindergarten	how bread is made, nonfiction	56	● ▲ ■ three copies (PDF)
When It Is Night Here, It Is Day There	Kindergarten	day and night on earth, nonfiction	59	● ▲ ■ three copies (PDF)
Which Way Is North?	Kindergarten	compass and directions, nonfiction	56	● ▲ ■ three copies (PDF)
Who Fills the Hole in the Road?	Kindergarten	road repair crews, nonfiction	58	● ▲ ■ three copies (PDF)
Who Helps at School?	Kindergarten	community helpers, nonfiction	47	● ▲ ■ three copies (PDF)
Who Took the Last Pickle?	Kindergarten	a pickle jar mystery, fiction	63	● ▲ ■ three copies (PDF)
Whose Turn on the Big Slide?	Kindergarten	taking turns fairly, fiction	50	● ▲ ■ three copies (PDF)
Why a Popcorn Kernel Goes Pop	Kindergarten	how popcorn pops, nonfiction	54	● ▲ ■ three copies (PDF)
Why Bats Hang Upside Down	Kindergarten	bats resting, nonfiction	46	● ▲ ■ three copies (PDF)
Why Goosebumps Pop Up on Your Arm	Kindergarten	goosebumps, nonfiction	66	● ▲ ■ three copies (PDF)
Why the Globe Is Blue and Green	Kindergarten	the globe, nonfiction	56	● ▲ ■ three copies (PDF)
Why We Love Trees	Kindergarten	how trees help us, nonfiction	52	● ▲ ■ three copies (PDF)
Why Wheels Are Not Square	Kindergarten	shapes that roll, nonfiction	60	● ▲ ■ three copies (PDF)
Why Your Tummy Says Grrr	Kindergarten	tummy noises, nonfiction	70	● ▲ ■ three copies (PDF)
Wind Pushes a Little Sailboat	Kindergarten	sailboats, nonfiction	55	● ▲ ■ three copies (PDF)
Wren Is the Caboose	Kindergarten	being last in line, fiction	62	● ▲ ■ three copies (PDF)
Writing in Wet Clay	Kindergarten	early writing on clay, nonfiction	48	● ▲ ■ three copies (PDF)
Your Fingertips Have Swirly Lines	Kindergarten	fingerprints, nonfiction	73	● ▲ ■ three copies (PDF)
Zip! The Zipper's Tiny Teeth	Kindergarten	how a zipper works, nonfiction	45	● ▲ ■ three copies (PDF)
A Basket Hangs Under a Hot Air Balloon	Grade 1	how a hot air balloon rises, nonfiction	103	● ▲ ■ three copies (PDF)
A Butterfly's Matching Wings	Grade 1	symmetry in shapes, nonfiction	87	● ▲ ■ three copies (PDF)
A Cheese Maker Turns Milk Into Cheese	Grade 1	cheese makers, nonfiction	90	● ▲ ■ three copies (PDF)
A Comet Tail Points Away From the Sun	Grade 1	comets, nonfiction	99	● ▲ ■ three copies (PDF)
A Curtain Down the Middle	Grade 1	twins sharing a bedroom, fiction	84	● ▲ ■ three copies (PDF)
A Goat in Grandma's Garden Hat	Grade 1	a goat eats a hat, fiction	92	● ▲ ■ three copies (PDF)
A Hare Changes Its Coat	Grade 1	snowshoe hares and seasons, nonfiction	87	● ▲ ■ three copies (PDF)
A Hat for Gran	Grade 1	kindness and gifts, fiction	92	● ▲ ■ three copies (PDF)
A Joey Climbs Into the Pouch	Grade 1	how a baby kangaroo grows, nonfiction	94	● ▲ ■ three copies (PDF)
A Library Where You Borrow Hammers	Grade 1	sharing tools in a town, nonfiction	91	● ▲ ■ three copies (PDF)
A Lump of Clay Sinks but a Clay Boat Floats	Grade 1	shape and floating, nonfiction	107	● ▲ ■ three copies (PDF)
A Map Shows Where	Grade 1	maps, nonfiction	91	● ▲ ■ three copies (PDF)
A Note Tucked in the Whale Book	Grade 1	a note in a book, fiction	102	● ▲ ■ three copies (PDF)
A Pickle Used to Be a Cucumber	Grade 1	pickles, nonfiction	95	● ▲ ■ three copies (PDF)
A Quilt Is a Blanket Made of Patches	Grade 1	quilts and patchwork, nonfiction	98	● ▲ ■ three copies (PDF)
A Rain Stick Makes a Shower Without Water	Grade 1	rain sticks, nonfiction	81	● ▲ ■ three copies (PDF)
A Robot with Six Wheels on Mars	Grade 1	mars rovers, nonfiction	101	● ▲ ■ three copies (PDF)
A Sand Clock for Telling Time	Grade 1	the hourglass, nonfiction	98	● ▲ ■ three copies (PDF)
A Shoe Fixer Saves a Boot	Grade 1	shoe repair, nonfiction	92	● ▲ ■ three copies (PDF)
A Squeegee Way Up in the Sky	Grade 1	window washers, nonfiction	87	● ▲ ■ three copies (PDF)
A Stamp Is a Ticket for Your Letter	Grade 1	postage stamps, nonfiction	108	● ▲ ■ three copies (PDF)
A Steeper Ramp Makes a Faster Toy Car	Grade 1	ramps and speed, nonfiction	113	● ▲ ■ three copies (PDF)
A Storm Bigger Than Earth	Grade 1	jupiter's red spot, nonfiction	105	● ▲ ■ three copies (PDF)
A Sun Hat for a Sunny Day	Grade 1	protecting skin from the sun, nonfiction	87	● ▲ ■ three copies (PDF)
A Thermometer Tells How Hot	Grade 1	measuring temperature, nonfiction	92	● ▲ ■ three copies (PDF)
A Tube, Wax Paper and a Buzzing Hum	Grade 1	making a kazoo, nonfiction	92	● ▲ ■ three copies (PDF)
A Woodpecker Taps and Drums	Grade 1	woodpeckers, nonfiction	88	● ▲ ■ three copies (PDF)
Ants Work Together	Grade 1	insects, nonfiction	89	● ▲ ■ three copies (PDF)
Bea and the Bean Bag Toss	Grade 1	practicing a game, fiction	100	● ▲ ■ three copies (PDF)
Bela the Bat Hangs Upside Down	Grade 1	a bat who is different, fiction	90	● ▲ ■ three copies (PDF)
Ben and Tess Share	Grade 1	friendship, fiction	108	● ▲ ■ three copies (PDF)
Big Back Tires on the Tractor	Grade 1	why tractors have huge tires, nonfiction	102	● ▲ ■ three copies (PDF)
Blue Bin, Green Bin: Your Town Decides	Grade 1	recycling rules in a town, nonfiction	100	● ▲ ■ three copies (PDF)
Boats Made of Reeds on Lake Titicaca	Grade 1	reed boats on a mountain lake, nonfiction	90	● ▲ ■ three copies (PDF)
Colored Sand Stacks Into Stripes in a Jar	Grade 1	layered sand art, nonfiction	100	● ▲ ■ three copies (PDF)
Counting Rainy Days on a Bar Graph	Grade 1	reading a bar graph, nonfiction	87	● ▲ ■ three copies (PDF)
Cranberries Float Up in the Bog	Grade 1	cranberry harvest, nonfiction	101	● ▲ ■ three copies (PDF)
Crayon Bits Melt Into One Rainbow Crayon	Grade 1	recycling broken crayons, nonfiction	83	● ▲ ■ three copies (PDF)
Dad's Lumpy Pancake Club	Grade 1	a family tradition of funny pancakes, fiction	93	● ▲ ■ three copies (PDF)
Dress for the Weather	Grade 1	clothes and weather, nonfiction	87	● ▲ ■ three copies (PDF)
Ducks at the Pond	Grade 1	animals, nonfiction	84	● ▲ ■ three copies (PDF)
Eat the Rainbow at Lunch	Grade 1	colorful foods and health, nonfiction	101	● ▲ ■ three copies (PDF)
Feel Your Throat Hum	Grade 1	sound and shaking, nonfiction	105	● ▲ ■ three copies (PDF)
Find Your Heartbeat	Grade 1	feeling your pulse, nonfiction	83	● ▲ ■ three copies (PDF)
Fingernails Never Stop Growing	Grade 1	fingernails, nonfiction	91	● ▲ ■ three copies (PDF)
Fireflies Blink to Say Hello	Grade 1	how fireflies talk with light, nonfiction	90	● ▲ ■ three copies (PDF)
Fit Your Helmet Just Right	Grade 1	wearing a bike helmet, nonfiction	92	● ▲ ■ three copies (PDF)
Five Fingers, Five Nickels	Grade 1	counting by fives with nickels, nonfiction	95	● ▲ ■ three copies (PDF)
Flat Breads Around the World	Grade 1	flat breads in different places, nonfiction	87	● ▲ ■ three copies (PDF)
Fog Is a Cloud on the Ground	Grade 1	fog, nonfiction	99	● ▲ ■ three copies (PDF)
Frog or Toad? Look Closely	Grade 1	frogs and toads compared, nonfiction	94	● ▲ ■ three copies (PDF)
From Tiny Seed to Big Pumpkin	Grade 1	how a pumpkin grows, nonfiction	102	● ▲ ■ three copies (PDF)
Grandpa and the Slow Walk	Grade 1	walking at a grandparent's speed, fiction	86	● ▲ ■ three copies (PDF)
Grandpa's Clock Runs Backward on Fridays	Grade 1	a clock that turns time back, fiction	81	● ▲ ■ three copies (PDF)
Grapes Dry in the Sun to Make Raisins	Grade 1	how raisins are made, nonfiction	89	● ▲ ■ three copies (PDF)
Green Stairs on the Hills of Luzon	Grade 1	rice terraces in the Philippines, nonfiction	89	● ▲ ■ three copies (PDF)
Hills, Mountains, and Valleys	Grade 1	landforms, nonfiction	93	● ▲ ■ three copies (PDF)
House Numbers Help the Helpers Find You	Grade 1	house numbers and addresses, nonfiction	103	● ▲ ■ three copies (PDF)
Houses on Tall Legs Above the Water	Grade 1	stilt houses, nonfiction	94	● ▲ ■ three copies (PDF)
How a Rainbow Is Made	Grade 1	rainbows, nonfiction	96	● ▲ ■ three copies (PDF)
How a Sign Painter Makes Straight Words	Grade 1	sign painters, nonfiction	89	● ▲ ■ three copies (PDF)
How Many Scoops Fill the Jar?	Grade 1	measuring how much a jar holds, nonfiction	83	● ▲ ■ three copies (PDF)
How to Build a Bug Hotel	Grade 1	a garden home for insects, nonfiction	97	● ▲ ■ three copies (PDF)
Ice Skates Made from Bones	Grade 1	the first ice skates, nonfiction	91	● ▲ ■ three copies (PDF)
Island or Peninsula? Count the Water Sides	Grade 1	islands and peninsulas, nonfiction	96	● ▲ ■ three copies (PDF)
Jax and the Gym Class Somersault	Grade 1	a first somersault, fiction	103	● ▲ ■ three copies (PDF)
Kit Folds a Paper Boat	Grade 1	paper folding hobby, fiction	97	● ▲ ■ three copies (PDF)
Lily Pads on the Pond	Grade 1	water lilies, nonfiction	82	● ▲ ■ three copies (PDF)
Lolo the Llama Counts Wrong	Grade 1	a llama who counts in a silly way, fiction	100	● ▲ ■ three copies (PDF)
Long Days and Short Days	Grade 1	daylight in the seasons, nonfiction	97	● ▲ ■ three copies (PDF)
Lunch Floats Away in Space	Grade 1	eating in space, nonfiction	94	● ▲ ■ three copies (PDF)
Make a Fruit Salad in Five Steps	Grade 1	making a fruit salad, nonfiction	97	● ▲ ■ three copies (PDF)
Moles Are Diggers	Grade 1	how a mole lives underground, nonfiction	97	● ▲ ■ three copies (PDF)
Moss Likes Damp, Shady Spots	Grade 1	moss, nonfiction	100	● ▲ ■ three copies (PDF)
Mr. Bun's Backwards Day	Grade 1	doing everything backwards, fiction	95	● ▲ ■ three copies (PDF)
Nell and the Hiccup That Moved In	Grade 1	silly hiccups, fiction	93	● ▲ ■ three copies (PDF)
Nia and the Double Knot	Grade 1	tying a shoe, fiction	93	● ▲ ■ three copies (PDF)
One of a Kind: Your Fingerprints	Grade 1	fingerprints, nonfiction	88	● ▲ ■ three copies (PDF)
One Sled, Two Turns	Grade 1	taking turns on a sled, fiction	82	● ▲ ■ three copies (PDF)
Otis Learns to Whistle	Grade 1	trying a hard skill, fiction	93	● ▲ ■ three copies (PDF)
Painted Stones Under the Birdbath	Grade 1	a trail of stones, fiction	100	● ▲ ■ three copies (PDF)
Paper Made from River Reeds	Grade 1	papyrus in ancient Egypt, nonfiction	85	● ▲ ■ three copies (PDF)
Pebbles in the Mail	Grade 1	keeping in touch with a friend who moved, fiction	84	● ▲ ■ three copies (PDF)
Pine Trees Stay Green	Grade 1	pine trees and oak trees, nonfiction	86	● ▲ ■ three copies (PDF)
Pip and the Squeaky Recorder	Grade 1	learning a first instrument, fiction	92	● ▲ ■ three copies (PDF)
Plant a Pot of Basil	Grade 1	growing an herb in a pot, nonfiction	90	● ▲ ■ three copies (PDF)
Please Connect Me, Operator	Grade 1	early telephone switchboards, nonfiction	89	● ▲ ■ three copies (PDF)
Potatoes Grow Under the Ground	Grade 1	potatoes, nonfiction	87	● ▲ ■ three copies (PDF)
Practice Makes a Fire Drill Calm	Grade 1	fire drills at school, nonfiction	100	● ▲ ■ three copies (PDF)
Price Tags at the Yard Sale	Grade 1	prices at a yard sale, nonfiction	90	● ▲ ■ three copies (PDF)
Pumpkins Grow on Vines	Grade 1	how plants grow, nonfiction	73	● ▲ ■ three copies (PDF)
Rain Washed My Hopscotch Away	Grade 1	a chalk game and a helpful neighbor, fiction	85	● ▲ ■ three copies (PDF)
Roads Built by Roman Workers	Grade 1	ancient Roman roads, nonfiction	94	● ▲ ■ three copies (PDF)
Rocks Big and Small	Grade 1	kinds of rocks, nonfiction	97	● ▲ ■ three copies (PDF)
Roll It Flat with a Rolling Pin	Grade 1	how a rolling pin flattens dough, nonfiction	103	● ▲ ■ three copies (PDF)
Rrrip! Hooks and Loops Hold Tight	Grade 1	hook and loop fasteners, nonfiction	99	● ▲ ■ three copies (PDF)
Salt Is Left Behind When the Sea Dries	Grade 1	how sea salt is made, nonfiction	95	● ▲ ■ three copies (PDF)
Sam and the Snail Tank	Grade 1	a classroom pet chore, fiction	99	● ▲ ■ three copies (PDF)
Sam Plants Beans	Grade 1	patience, fiction	86	● ▲ ■ three copies (PDF)
Sam Rides the Bus to the Blue Door	Grade 1	a bus trip, fiction	99	● ▲ ■ three copies (PDF)
Sand Starts as Rock	Grade 1	how sand is made, nonfiction	89	● ▲ ■ three copies (PDF)
Scraps Make Rich Soil	Grade 1	compost, nonfiction	95	● ▲ ■ three copies (PDF)
Seven Days Make One Week	Grade 1	days of the week on a calendar, nonfiction	89	● ▲ ■ three copies (PDF)
Shapes All Around	Grade 1	shapes in math, nonfiction	79	● ▲ ■ three copies (PDF)
Shiver, Shiver, Warm Up	Grade 1	why we shiver, nonfiction	80	● ▲ ■ three copies (PDF)
Snow Is Frozen Water	Grade 1	weather and water, nonfiction	78	● ▲ ■ three copies (PDF)
Spin, Spin, Spin the Salad Dry	Grade 1	how a salad spinner works, nonfiction	96	● ▲ ■ three copies (PDF)
Stamp a Star with a Potato	Grade 1	potato printing, nonfiction	86	● ▲ ■ three copies (PDF)
Start Your Ruler at Zero	Grade 1	how to use a ruler, nonfiction	83	● ▲ ■ three copies (PDF)
Stiff Spaghetti Goes Soft in Hot Water	Grade 1	cooking pasta, nonfiction	93	● ▲ ■ three copies (PDF)
Stomp, Clap, Snap: Your Body Is a Drum Set	Grade 1	body percussion, nonfiction	80	● ▲ ■ three copies (PDF)
Streets Made of Water in Venice	Grade 1	the city of Venice, nonfiction	100	● ▲ ■ three copies (PDF)
Sunflower Seeds Grow in the Face	Grade 1	sunflowers as food, nonfiction	96	● ▲ ■ three copies (PDF)
Sweet Sap from a Maple Tree	Grade 1	maple syrup, nonfiction	91	● ▲ ■ three copies (PDF)
Swish! Wipers Clear the Rain	Grade 1	windshield wipers, nonfiction	92	● ▲ ■ three copies (PDF)
Teo and the Wobbly Bean Row	Grade 1	a gardening chore, fiction	97	● ▲ ■ three copies (PDF)
The Bathtub Island with a Duck Captain	Grade 1	a pretend island in the bath, fiction	82	● ▲ ■ three copies (PDF)
The Beaver Who Built a Lopsided Dam	Grade 1	a beaver tries again, fiction	94	● ▲ ■ three copies (PDF)
The Beekeeper and the Puff of Smoke	Grade 1	beekeepers, nonfiction	80	● ▲ ■ three copies (PDF)
The Belly Grumble Mystery	Grade 1	why a stomach rumbles, nonfiction	101	● ▲ ■ three copies (PDF)
The Big Hill	Grade 1	trying again, fiction	80	● ▲ ■ three copies (PDF)
The Bike with No Pedals	Grade 1	the first bicycles, nonfiction	86	● ▲ ■ three copies (PDF)
The Box Fort on Moving Day	Grade 1	moving to a new home, fiction	93	● ▲ ■ three copies (PDF)
The Bridge Tender Lifts the Road	Grade 1	bridge tenders, nonfiction	85	● ▲ ■ three copies (PDF)
The Button Jar Swap	Grade 1	trading buttons with a friend, fiction	95	● ▲ ■ three copies (PDF)
The Cable Car Climbs the Mountain	Grade 1	how a cable car travels uphill, nonfiction	92	● ▲ ■ three copies (PDF)
The Camel Who Packed Too Much	Grade 1	a camel and a heavy pack, fiction	104	● ▲ ■ three copies (PDF)
The Chameleon's Sneaky Tongue	Grade 1	how a chameleon hunts, nonfiction	94	● ▲ ■ three copies (PDF)
The Cow Who Said Meow	Grade 1	an animal that makes the wrong sound, fiction	82	● ▲ ■ three copies (PDF)
The Dancing Dot on the Wall	Grade 1	a dot of light, fiction	98	● ▲ ■ three copies (PDF)
The Dim Firefly and the Lost Chick	Grade 1	a small light helps, fiction	104	● ▲ ■ three copies (PDF)
The Door in the Pumpkin Patch	Grade 1	a small door inside a pumpkin, fiction	83	● ▲ ■ three copies (PDF)
The Dragon Who Feared Birthday Candles	Grade 1	a dragon afraid of little flames, fiction	79	● ▲ ■ three copies (PDF)
The Four Seasons	Grade 1	weather and seasons, nonfiction	74	● ▲ ■ three copies (PDF)
The Fourth Stair Says Squeak	Grade 1	a squeaky stair, fiction	102	● ▲ ■ three copies (PDF)
The Goat and the Squeaky Bridge	Grade 1	taking turns on a bridge, fiction	104	● ▲ ■ three copies (PDF)
The Hard Word on Friday	Grade 1	a tricky spelling word, fiction	97	● ▲ ■ three copies (PDF)
The Hedgehog Who Sorted Buttons	Grade 1	a hedgehog and buttons, fiction	95	● ▲ ■ three copies (PDF)
The Hen Who Hatched a Red Sock	Grade 1	a mix-up on the farm, fiction	95	● ▲ ■ three copies (PDF)
The Heron and the Shared Pond	Grade 1	sharing a pond, fiction	99	● ▲ ■ three copies (PDF)
The Lamplighter Walks at Dusk	Grade 1	street lamps before electric lights, nonfiction	92	● ▲ ■ three copies (PDF)
The Lost Minute Under the Couch	Grade 1	a minute of time that got lost, fiction	86	● ▲ ■ three copies (PDF)
The Lost Mitten Box	Grade 1	returning lost things, fiction	106	● ▲ ■ three copies (PDF)
The Map Key Is a Secret Decoder	Grade 1	reading a map key, nonfiction	90	● ▲ ■ three copies (PDF)
The Milk Wagon and Its Horse	Grade 1	milk delivered by horse and wagon, nonfiction	102	● ▲ ■ three copies (PDF)
The Mime Who Talks With No Words	Grade 1	mimes and acting, nonfiction	93	● ▲ ■ three copies (PDF)
The Mole Who Wanted to See the Moon	Grade 1	a mole and the moon, fiction	93	● ▲ ■ three copies (PDF)
The Moon	Grade 1	space, nonfiction	98	● ▲ ■ three copies (PDF)
The New Baby Has Hiccups	Grade 1	a big brother helps a baby, fiction	94	● ▲ ■ three copies (PDF)
The Nile Flows Up the Map	Grade 1	the Nile river, nonfiction	104	● ▲ ■ three copies (PDF)
The Otter Who Kept the Wrong Rock	Grade 1	an otter tells the truth, fiction	102	● ▲ ■ three copies (PDF)
The Parrot Who Could Not Keep a Secret	Grade 1	a parrot repeats a secret, fiction	101	● ▲ ■ three copies (PDF)
The Piano Tuner Has Good Ears	Grade 1	piano tuners, nonfiction	80	● ▲ ■ three copies (PDF)
The Pill Bug Rolls Into a Ball	Grade 1	pill bugs, nonfiction	90	● ▲ ■ three copies (PDF)
The Rain Boot With a Frog Inside	Grade 1	a missing boot, fiction	101	● ▲ ■ three copies (PDF)
The Red Sock in the Sandbox Tunnel	Grade 1	a lost sock, fiction	96	● ▲ ■ three copies (PDF)
The Scab Is a Bandage	Grade 1	how a scrape heals, nonfiction	89	● ▲ ■ three copies (PDF)
The Secret Bolt Inside a Doorknob	Grade 1	how a doorknob opens a door, nonfiction	107	● ▲ ■ three copies (PDF)
The Short Hand Tells the Hour	Grade 1	reading an o'clock time, nonfiction	80	● ▲ ■ three copies (PDF)
The Snail Train to the Garden Gate	Grade 1	a tiny train pulled by snails, fiction	83	● ▲ ■ three copies (PDF)
The Snowman Who Wanted a Sunburn	Grade 1	a snowman and the sun, fiction	100	● ▲ ■ three copies (PDF)
The Sock That Learned to Whistle	Grade 1	a lost sock with a tune, fiction	71	● ▲ ■ three copies (PDF)
The Spoon That Stirred Up Snow	Grade 1	a spoon that stirs up weather, fiction	81	● ▲ ■ three copies (PDF)
The Sun Is a Star Up Close	Grade 1	the sun as a star, nonfiction	105	● ▲ ■ three copies (PDF)
The Tick in Dad's Toolbox	Grade 1	a ticking toolbox, fiction	98	● ▲ ■ three copies (PDF)
The Town Crier Rings His Bell	Grade 1	how news spread in a town, nonfiction	96	● ▲ ■ three copies (PDF)
The Town Meeting in the School Gym	Grade 1	town meetings, nonfiction	82	● ▲ ■ three copies (PDF)
The Tree Trimmer Climbs on a Rope	Grade 1	tree trimmers, nonfiction	100	● ▲ ■ three copies (PDF)
The Turnip as Big as a Barn	Grade 1	a tall tale about a giant turnip, fiction	94	● ▲ ■ three copies (PDF)
The Umbrella That Rained Inside	Grade 1	an umbrella with its own rain, fiction	78	● ▲ ■ three copies (PDF)
Three Fair Ways to Pick Who Goes First	Grade 1	fair ways to choose, nonfiction	98	● ▲ ■ three copies (PDF)
Three Mittens on the Fence Post	Grade 1	a mitten puzzle, fiction	103	● ▲ ■ three copies (PDF)
Ting! A Triangle Rings When It Hangs Free	Grade 1	the triangle instrument, nonfiction	81	● ▲ ■ three copies (PDF)
Tuba in the Bathtub	Grade 1	a tuba in the bath, fiction	95	● ▲ ■ three copies (PDF)
Twelve Eggs in Two Rows	Grade 1	a dozen eggs, nonfiction	91	● ▲ ■ three copies (PDF)
Twist! A Sharpener Shaves a Pencil Point	Grade 1	how a pencil sharpener works, nonfiction	104	● ▲ ■ three copies (PDF)
Two Left Mittens	Grade 1	mismatched mittens and a new friend, fiction	93	● ▲ ■ three copies (PDF)
Two Left Shoes for Mr. Gruff	Grade 1	a shoe mix-up, fiction	98	● ▲ ■ three copies (PDF)
Using a Telescope on a Clear Night	Grade 1	telescopes, nonfiction	101	● ▲ ■ three copies (PDF)
Warm Pools in Cold Iceland	Grade 1	hot springs in Iceland, nonfiction	94	● ▲ ■ three copies (PDF)
Water Turns Into Balls in Space	Grade 1	water in space, nonfiction	84	● ▲ ■ three copies (PDF)
Whales Live in the Sea	Grade 1	ocean animals, nonfiction	89	● ▲ ■ three copies (PDF)
What to Put on a Lost Dog Poster	Grade 1	helping neighbors find a lost pet, nonfiction	96	● ▲ ■ three copies (PDF)
Wheels Help Us Move	Grade 1	how things work, nonfiction	82	● ▲ ■ three copies (PDF)
Where Did the Puddle Go?	Grade 1	puddles drying up, nonfiction	88	● ▲ ■ three copies (PDF)
Where Milk Comes From	Grade 1	farm animals and food, nonfiction	89	● ▲ ■ three copies (PDF)
Which Part Are We Eating?	Grade 1	plant parts we eat, nonfiction	97	● ▲ ■ three copies (PDF)
Which Way Does the Compass Rose Point?	Grade 1	directions on a map, nonfiction	88	● ▲ ■ three copies (PDF)
Why a Bouncing Ball Bounces Lower Each Time	Grade 1	bouncing balls and energy, nonfiction	116	● ▲ ■ three copies (PDF)
Why a Dark Shirt Feels Warmer in the Sun	Grade 1	dark and light colors in sunshine, nonfiction	105	● ▲ ■ three copies (PDF)
Why a Flamingo Is Pink	Grade 1	flamingo color and food, nonfiction	89	● ▲ ■ three copies (PDF)
Why a Spinning Top Finally Falls Over	Grade 1	spinning tops and slowing down, nonfiction	111	● ▲ ■ three copies (PDF)
Why a Stop Sign Has Eight Sides	Grade 1	road signs, nonfiction	83	● ▲ ■ three copies (PDF)
Why a Straw Brings Up Your Juice	Grade 1	how a drinking straw works, nonfiction	104	● ▲ ■ three copies (PDF)
Why an Apple Floats in the Sink	Grade 1	apples float, nonfiction	90	● ▲ ■ three copies (PDF)
Why Astronauts Wear a Suit Outside	Grade 1	space suits, nonfiction	104	● ▲ ■ three copies (PDF)
Why Chopped Onions Make You Cry	Grade 1	onions and tears, nonfiction	82	● ▲ ■ three copies (PDF)
Why Does the Plant Droop?	Grade 1	why plants wilt, nonfiction	93	● ▲ ■ three copies (PDF)
Why Honey Pours Slower Than Water	Grade 1	thick and thin liquids, nonfiction	103	● ▲ ■ three copies (PDF)
Why Mittens Come in Twos	Grade 1	pairs and counting by twos, nonfiction	88	● ▲ ■ three copies (PDF)
Why Onions Make You Cry	Grade 1	tears from onions, nonfiction	91	● ▲ ■ three copies (PDF)
Why Rain Is Loud on a Tin Roof	Grade 1	rain sounds on hard and soft things, nonfiction	113	● ▲ ■ three copies (PDF)
Why Stars Seem to Wink	Grade 1	twinkling stars, nonfiction	72	● ▲ ■ three copies (PDF)
Why the Street Sweeper Comes Early	Grade 1	street sweepers, nonfiction	96	● ▲ ■ three copies (PDF)
Why the Tailor Measures Twice	Grade 1	tailors, nonfiction	87	● ▲ ■ three copies (PDF)
Why Votes Are Kept Secret	Grade 1	secret ballots, nonfiction	94	● ▲ ■ three copies (PDF)
Why We Sleep	Grade 1	sleep and health, nonfiction	71	● ▲ ■ three copies (PDF)
Why You Get Goose Bumps	Grade 1	goose bumps, nonfiction	81	● ▲ ■ three copies (PDF)
Wind Chimes Sing When the Breeze Blows	Grade 1	wind chimes, nonfiction	98	● ▲ ■ three copies (PDF)
Wind Is Air on the Move	Grade 1	wind, nonfiction	90	● ▲ ■ three copies (PDF)
Window, Wax Paper, Wall: Who Lets Light Through?	Grade 1	see-through and blocking light, nonfiction	102	● ▲ ■ three copies (PDF)
Writing with a Feather Pen	Grade 1	quill pens, nonfiction	91	● ▲ ■ three copies (PDF)
Your Breath Makes a Cloud in Winter	Grade 1	breath clouds in cold air, nonfiction	99	● ▲ ■ three copies (PDF)
Your Shadow Is Long at Sunrise	Grade 1	sun and shadows, nonfiction	106	● ▲ ■ three copies (PDF)
Zed's Hat Sails Off the Pier	Grade 1	a hat in the wind, fiction	102	● ▲ ■ three copies (PDF)
Zib the Robot and the Moon Flowers	Grade 1	a robot who waters night flowers, fiction	74	● ▲ ■ three copies (PDF)
A Black Sky Above the Moon	Grade 2	the sky as seen from the moon, nonfiction	121	● ▲ ■ three copies (PDF)
A Bulletin Board for the Whole Block	Grade 2	sharing news with neighbors, nonfiction	128	● ▲ ■ three copies (PDF)
A Butterfly's Four Stages	Grade 2	butterfly life cycle, nonfiction	118	● ▲ ■ three copies (PDF)
A Dime Jar on the Windowsill	Grade 2	saving coins in a jar, nonfiction	123	● ▲ ■ three copies (PDF)
A Geode Hides Sparkles Inside	Grade 2	geodes and crystals, nonfiction	133	● ▲ ■ three copies (PDF)
A Glassblower Makes a Bubble	Grade 2	glassblower at work, nonfiction	122	● ▲ ■ three copies (PDF)
A Hook for Jo's Scarf	Grade 2	a new stepsister moving in, fiction	155	● ▲ ■ three copies (PDF)
A House Built of Mammoth Bones	Grade 2	ice age homes, nonfiction	117	● ▲ ■ three copies (PDF)
A House Made of Grass and Dirt	Grade 2	sod houses on the prairie, nonfiction	116	● ▲ ■ three copies (PDF)
A Jellyfish Has No Bones and No Brain	Grade 2	jellyfish bodies, nonfiction	130	● ▲ ■ three copies (PDF)
A Map Maker Picks What to Show	Grade 2	mapmaker choices, nonfiction	145	● ▲ ■ three copies (PDF)
A Nickel for Every Bag of Leaves	Grade 2	earning money with jobs, nonfiction	130	● ▲ ■ three copies (PDF)
A Pan of Coals for a Cold Bed	Grade 2	warming a bed long ago, nonfiction	121	● ▲ ■ three copies (PDF)
A Pigeon with a Note on Its Leg	Grade 2	carrier pigeons, nonfiction	103	● ▲ ■ three copies (PDF)
A Rainbow Made by a Glass of Water	Grade 2	light bending in water, nonfiction	125	● ▲ ■ three copies (PDF)
A River Carves a Canyon	Grade 2	canyons and rivers, nonfiction	129	● ▲ ■ three copies (PDF)
A Round Home That Packs Into a Cart	Grade 2	mongolian ger tents, nonfiction	128	● ▲ ■ three copies (PDF)
A Rubber Band Stretches and Snaps Back	Grade 2	rubber bands, nonfiction	143	● ▲ ■ three copies (PDF)
A Sea Star Can Grow Back an Arm	Grade 2	sea star arms, nonfiction	127	● ▲ ■ three copies (PDF)
A Seed Grows	Grade 2	plants, nonfiction	107	● ▲ ■ three copies (PDF)
A Slate and a Rag for School	Grade 2	school long ago, nonfiction	116	● ▲ ■ three copies (PDF)
A Small Boat Guides a Giant Ship	Grade 2	harbor pilot, nonfiction	156	● ▲ ■ three copies (PDF)
A Tide Pool Is a Tiny Home by the Sea	Grade 2	tide pools, nonfiction	139	● ▲ ■ three copies (PDF)
A Town Counts Every Person	Grade 2	the census, nonfiction	125	● ▲ ■ three copies (PDF)
A Year on Mercury Is Very Short	Grade 2	how long a planet's year is, nonfiction	113	● ▲ ■ three copies (PDF)
Achoo! The Nose Cleaner	Grade 2	why we sneeze, nonfiction	121	● ▲ ■ three copies (PDF)
An Acorn for the Missing Piece	Grade 2	a lost game piece and a kind swap, fiction	154	● ▲ ■ three copies (PDF)
Beavers Build a Lodge	Grade 2	beavers and dams, nonfiction	136	● ▲ ■ three copies (PDF)
Beni's First Chess Club Match	Grade 2	a first chess game, fiction	125	● ▲ ■ three copies (PDF)
Breakfast at Dawn with Baker Mom	Grade 2	a parent who works at night, fiction	153	● ▲ ■ three copies (PDF)
Buttoned Boots and the First Zipper	Grade 2	the zipper, nonfiction	121	● ▲ ■ three copies (PDF)
Captain Fig Sails the Soup Pot	Grade 2	a tiny captain at sea in a kitchen, fiction	131	● ▲ ■ three copies (PDF)
Castle Drawbridges and River Drawbridges	Grade 2	two kinds of drawbridge, nonfiction	123	● ▲ ■ three copies (PDF)
Chile Is Long and Thin Like a Ribbon	Grade 2	the shape of chile, nonfiction	128	● ▲ ■ three copies (PDF)
Cinnamon Curls as It Dries	Grade 2	where cinnamon comes from, nonfiction	97	● ▲ ■ three copies (PDF)
Cog the Checkers Robot Wants to Lose	Grade 2	a robot who always wins at checkers, fiction	128	● ▲ ■ three copies (PDF)
Counting Coins	Grade 2	money and math, nonfiction	102	● ▲ ■ three copies (PDF)
Counting Up to Make Change	Grade 2	making change at a sale, nonfiction	136	● ▲ ■ three copies (PDF)
Counting with Beads on an Abacus	Grade 2	the abacus, nonfiction	116	● ▲ ■ three copies (PDF)
Dolphins Click and Whistle	Grade 2	how dolphins communicate, nonfiction	134	● ▲ ■ three copies (PDF)
Dot and the Mountain of Car Bubbles	Grade 2	washing the family car, fiction	136	● ▲ ■ three copies (PDF)
Draw Your Own Star Picture	Grade 2	making a constellation, nonfiction	127	● ▲ ■ three copies (PDF)
Earthworms Help the Soil	Grade 2	earthworms and soil, nonfiction	135	● ▲ ■ three copies (PDF)
Escalator Stairs That Never Stop	Grade 2	escalators, nonfiction	147	● ▲ ■ three copies (PDF)
Ezra and the Wrong Door Parade	Grade 2	being line leader, fiction	129	● ▲ ■ three copies (PDF)
Ferdie Fox and the Echo That Talked Back	Grade 2	a fox who argues with an echo, fiction	122	● ▲ ■ three copies (PDF)
Finding an Island by Stars and Waves	Grade 2	pacific wayfinders, nonfiction	128	● ▲ ■ three copies (PDF)
Fish Keep Swimming Under Pond Ice	Grade 2	ice on ponds, nonfiction	134	● ▲ ■ three copies (PDF)
Flash First, Boom Later	Grade 2	lightning and thunder, nonfiction	135	● ▲ ■ three copies (PDF)
Four Easy Ways to Save Water at the Sink	Grade 2	saving water, nonfiction	136	● ▲ ■ three copies (PDF)
From Tadpole to Frog	Grade 2	animal life cycles, nonfiction	112	● ▲ ■ three copies (PDF)
Frost Draws Feathers on Your Window	Grade 2	frost on windows, nonfiction	116	● ▲ ■ three copies (PDF)
Garlic Hides in Winter Dirt	Grade 2	planting garlic in the fall, nonfiction	108	● ▲ ■ three copies (PDF)
Glow Stripes for Evening Walks	Grade 2	being seen at dusk, nonfiction	124	● ▲ ■ three copies (PDF)
Good Night Taps on the Wall	Grade 2	a new neighbor and a wall code, fiction	141	● ▲ ■ three copies (PDF)
Goodbye Stones for Tavi	Grade 2	a friend who is moving away, fiction	137	● ▲ ■ three copies (PDF)
Grandpa's Glasses in the Hen House	Grade 2	lost glasses on a farm, fiction	137	● ▲ ■ three copies (PDF)
Grandpa's Thumbs Are Too Big	Grade 2	teaching grandpa to use a phone, fiction	142	● ▲ ■ three copies (PDF)
Grass Roofs in the Faroe Islands	Grade 2	houses with grass roofs, nonfiction	123	● ▲ ■ three copies (PDF)
Grow a Bean in a Bag	Grade 2	sprouting a bean seed, nonfiction	112	● ▲ ■ three copies (PDF)
Gus Hears Hold Your Horses	Grade 2	a boy who takes sayings too literally, fiction	126	● ▲ ■ three copies (PDF)
Half Past Seven on the Clock	Grade 2	telling time on the half hour, nonfiction	114	● ▲ ■ three copies (PDF)
Hands That Talk: A Sign Language Interpreter	Grade 2	sign language interpreter, nonfiction	134	● ▲ ■ three copies (PDF)
Hold Your Nose, Lose the Flavor	Grade 2	smell and taste working together, nonfiction	133	● ▲ ■ three copies (PDF)
How a Beaver Dam Makes a Pond	Grade 2	beaver dams, nonfiction	123	● ▲ ■ three copies (PDF)
How a Class Idea Becomes a Rule	Grade 2	making a new rule together, nonfiction	128	● ▲ ■ three copies (PDF)
How a Lump of Clay Becomes a Bowl	Grade 2	pottery wheel, nonfiction	121	● ▲ ■ three copies (PDF)
How a Music Box Remembers a Song	Grade 2	music boxes, nonfiction	113	● ▲ ■ three copies (PDF)
How a Puppet Maker Gives a Sock a Face	Grade 2	puppet maker, nonfiction	145	● ▲ ■ three copies (PDF)
How a Town Pays for a New Swing Set	Grade 2	taxes and town money, nonfiction	126	● ▲ ■ three copies (PDF)
How an Icicle Grows	Grade 2	icicles, nonfiction	130	● ▲ ■ three copies (PDF)
How Spiders Spin Webs	Grade 2	spiders, nonfiction	120	● ▲ ■ three copies (PDF)
How to Build a Rubber Band Guitar	Grade 2	sound from vibrations, nonfiction	134	● ▲ ■ three copies (PDF)
How to Watch Backyard Birds	Grade 2	bird watching for beginners, nonfiction	135	● ▲ ■ three copies (PDF)
Hummingbirds Hover and Sip	Grade 2	how hummingbirds fly and eat, nonfiction	126	● ▲ ■ three copies (PDF)
Ice Cube Race: Sun Against Shade	Grade 2	heat and melting ice, nonfiction	123	● ▲ ■ three copies (PDF)
Ines Knits a Scarf Full of Holes	Grade 2	learning to knit, fiction	131	● ▲ ■ three copies (PDF)
Inside a Popping Kernel	Grade 2	how popcorn pops, nonfiction	115	● ▲ ■ three copies (PDF)
Inside a Watch Fixer's Tiny Shop	Grade 2	watch repair worker, nonfiction	137	● ▲ ■ three copies (PDF)
Is It Almost Noon? Ask the Sundial	Grade 2	sundials, nonfiction	114	● ▲ ■ three copies (PDF)
Jewels of Dew on a Spider Web	Grade 2	morning dew, nonfiction	129	● ▲ ■ three copies (PDF)
Keep a Weather Diary for One Week	Grade 2	how to track weather, nonfiction	134	● ▲ ■ three copies (PDF)
Keep the Fire Hydrant Clear	Grade 2	fire hydrant rules, nonfiction	129	● ▲ ■ three copies (PDF)
Kofi's Kite Needs a Longer Tail	Grade 2	fixing a kite that spins, fiction	135	● ▲ ■ three copies (PDF)
Lena's Wobbly Table Tennis Serve	Grade 2	learning table tennis, fiction	126	● ▲ ■ three copies (PDF)
Lentils Cook Fast	Grade 2	lentils and their pods, nonfiction	101	● ▲ ■ three copies (PDF)
Lunch Boxes You Buy at a Train Station	Grade 2	station lunch boxes in japan, nonfiction	112	● ▲ ■ three copies (PDF)
Magnets Push and Pull	Grade 2	forces and magnets, nonfiction	105	● ▲ ■ three copies (PDF)
Making a Picture from Broken Tiles	Grade 2	mosaics, nonfiction	114	● ▲ ■ three copies (PDF)
Many Sunrises in One Day	Grade 2	sunrises on the space station, nonfiction	120	● ▲ ■ three copies (PDF)
Marcus Juggles Three Silk Scarves	Grade 2	learning to juggle, fiction	131	● ▲ ■ three copies (PDF)
Measure a Trip With a Strip of Paper	Grade 2	how to use a map scale, nonfiction	137	● ▲ ■ three copies (PDF)
Measuring a Boot with Paper Clips	Grade 2	measuring with small units, nonfiction	128	● ▲ ■ three copies (PDF)
Mina's Kite on the Barn Roof	Grade 2	getting a kite down from a roof, fiction	142	● ▲ ■ three copies (PDF)
Mina's Pocket Watch Saved Extra Seconds	Grade 2	a watch that stores spare seconds, fiction	135	● ▲ ■ three copies (PDF)
Mirrors Make Patterns in a Kaleidoscope	Grade 2	kaleidoscopes, nonfiction	145	● ▲ ■ three copies (PDF)
Mossy the Dragon and the Frozen Pond	Grade 2	a dragon helps a skating pond, fiction	132	● ▲ ■ three copies (PDF)
Muscles Take Turns	Grade 2	how muscles work in pairs, nonfiction	112	● ▲ ■ three copies (PDF)
Needs and Wants	Grade 2	money and choices, nonfiction	96	● ▲ ■ three copies (PDF)
Neighbors Who Sit on a Jury	Grade 2	juries in a courtroom, nonfiction	124	● ▲ ■ three copies (PDF)
Nora Looks for Her Shoe	Grade 2	finding a lost shoe, fiction	106	● ▲ ■ three copies (PDF)
Odalys and the Fitted Sheet Puzzle	Grade 2	folding a fitted sheet, fiction	131	● ▲ ■ three copies (PDF)
Pip and the Puddle Boat	Grade 2	a rainy day, fiction	113	● ▲ ■ three copies (PDF)
Pip the Hermit Crab Finds a Roomier Home	Grade 2	hermit crab shells, nonfiction	130	● ▲ ■ three copies (PDF)
Playing Knucklebones in Ancient Greece	Grade 2	a game from ancient greece, nonfiction	113	● ▲ ■ three copies (PDF)
Puddle Is Called Something Else	Grade 2	a new classmate and new words, fiction	142	● ▲ ■ three copies (PDF)
Pumice, the Rock That Floats	Grade 2	pumice from volcanoes, nonfiction	133	● ▲ ■ three copies (PDF)
Reading a Clock	Grade 2	telling time, nonfiction	114	● ▲ ■ three copies (PDF)
Rice Grows with Wet Feet	Grade 2	rice paddies, nonfiction	117	● ▲ ■ three copies (PDF)
Rosa and the Envelope Stamp Swap	Grade 2	collecting postage stamps, fiction	133	● ▲ ■ three copies (PDF)
Seeds on the Move	Grade 2	plants and seeds, nonfiction	103	● ▲ ■ three copies (PDF)
Seeing Through the Ice of Lake Baikal	Grade 2	a frozen lake in siberia, nonfiction	113	● ▲ ■ three copies (PDF)
Shadow Puppets with a Lamp and a Wall	Grade 2	shadow puppet shows, nonfiction	113	● ▲ ■ three copies (PDF)
Sharing a Sandwich in Fourths	Grade 2	equal shares and fourths, nonfiction	114	● ▲ ■ three copies (PDF)
Shopping From a Boat in Thailand	Grade 2	floating markets, nonfiction	117	● ▲ ■ three copies (PDF)
Short Bars and Long Bars on a Xylophone	Grade 2	xylophone notes, nonfiction	119	● ▲ ■ three copies (PDF)
Six Sides in a Honeycomb	Grade 2	shapes in a beehive, nonfiction	114	● ▲ ■ three copies (PDF)
Sock Sparks on a Dry Winter Day	Grade 2	static electricity, nonfiction	121	● ▲ ■ three copies (PDF)
Spit Starts Your Lunch	Grade 2	saliva and eating, nonfiction	112	● ▲ ■ three copies (PDF)
Sully the Cloud Shepherd's Stuck Lamb	Grade 2	a girl who herds sheep made of cloud, fiction	136	● ▲ ■ three copies (PDF)
Sunny Roofs Grow Spiky Winter Icicles	Grade 2	how icicles form, nonfiction	124	● ▲ ■ three copies (PDF)
Sweat Is Your Built-In Cooler	Grade 2	why we sweat, nonfiction	122	● ▲ ■ three copies (PDF)
Take a Number at the Bakery	Grade 2	fair lines and waiting turns, nonfiction	125	● ▲ ■ three copies (PDF)
Tally Marks and the Class Pet Vote	Grade 2	tally marks and counting votes, nonfiction	119	● ▲ ■ three copies (PDF)
Telling Time With a Stick and a Shadow	Grade 2	a sundial and the moving sun, nonfiction	120	● ▲ ■ three copies (PDF)
The Backward Birthday	Grade 2	a birthday with a new baby, fiction	145	● ▲ ■ three copies (PDF)
The Bell That Rang Under the Porch Swing	Grade 2	a missing bell, fiction	128	● ▲ ■ three copies (PDF)
The Black Dot That Changes Size	Grade 2	the pupil of the eye, nonfiction	127	● ▲ ■ three copies (PDF)
The Blanket Fort with Seven Rooms	Grade 2	a pretend fort that grows inside, fiction	139	● ▲ ■ three copies (PDF)
The Book That Would Not Stop Giggling	Grade 2	a library book that laughs, fiction	128	● ▲ ■ three copies (PDF)
The Button Garden Behind the Laundry Room	Grade 2	buttons that grow like flowers, fiction	137	● ▲ ■ three copies (PDF)
The Camel Who Carried Too Many Jars	Grade 2	a camel and a heavy load, fiction	123	● ▲ ■ three copies (PDF)
The Case of the Odd Sock	Grade 2	even and odd numbers, nonfiction	122	● ▲ ■ three copies (PDF)
The Clickety Shoes of a Tap Dancer	Grade 2	tap dancing, nonfiction	116	● ▲ ■ three copies (PDF)
The Community Garden Water Schedule	Grade 2	sharing a garden, nonfiction	122	● ▲ ■ three copies (PDF)
The Compass That Pointed to Lost Things	Grade 2	a magic compass finds missing items, fiction	132	● ▲ ■ three copies (PDF)
The Cool Dark Root Cellar	Grade 2	keeping food in a root cellar, nonfiction	101	● ▲ ■ three copies (PDF)
The Cows That Climb Up the Alps	Grade 2	mountain meadows in switzerland, nonfiction	118	● ▲ ■ three copies (PDF)
The Crab Who Taught Walking Straight	Grade 2	a crab and her child, fiction	127	● ▲ ■ three copies (PDF)
The Day the Bakery Swapped Its Signs	Grade 2	shop signs in the wrong places, fiction	121	● ▲ ■ three copies (PDF)
The Echo Cave Under Maple Hill	Grade 2	a hike to a cave with an echo, fiction	140	● ▲ ■ three copies (PDF)
The Echo That Answered Late	Grade 2	a slow echo in a canyon, fiction	126	● ▲ ■ three copies (PDF)
The Empty Room That Answers Back	Grade 2	echoes in empty rooms, nonfiction	119	● ▲ ■ three copies (PDF)
The Farrier Fits a Horseshoe	Grade 2	farrier and horse hooves, nonfiction	139	● ▲ ■ three copies (PDF)
The Giant Pumpkin Patch	Grade 2	a garden and teamwork, fiction	109	● ▲ ■ three copies (PDF)
The Glass Circles That Helped People Read	Grade 2	the first eyeglasses, nonfiction	111	● ▲ ■ three copies (PDF)
The Goat Who Counted Pebbles	Grade 2	a goat and a mistake, fiction	128	● ▲ ■ three copies (PDF)
The Hedgehog and the Leaf Umbrella	Grade 2	a hedgehog who gives back, fiction	127	● ▲ ■ three copies (PDF)
The Ice Machine Driver at the Rink	Grade 2	ice rink resurfacing, nonfiction	141	● ▲ ■ three copies (PDF)
The Ice Rink Gets a Smooth Bath	Grade 2	ice resurfacing machine, nonfiction	125	● ▲ ■ three copies (PDF)
The Jar of Buttons and the Color Code	Grade 2	solving a color code, fiction	147	● ▲ ■ three copies (PDF)
The Kite That Tugged the Sunrise	Grade 2	a kite and the morning sun, fiction	136	● ▲ ■ three copies (PDF)
The Lemonade Line to the Next Town	Grade 2	a very long line at a lemonade stand, fiction	131	● ▲ ■ three copies (PDF)
The Library Inside a Walnut	Grade 2	a tiny library in a walnut shell, fiction	137	● ▲ ■ three copies (PDF)
The Lighthouse Beam Turns Round and Round	Grade 2	lighthouses, nonfiction	145	● ▲ ■ three copies (PDF)
The Little Shield on Your Knee	Grade 2	the kneecap, nonfiction	122	● ▲ ■ three copies (PDF)
The Little Wheel on a Can Opener	Grade 2	can openers, nonfiction	142	● ▲ ■ three copies (PDF)
The Lost Mitten	Grade 2	friendship, fiction	141	● ▲ ■ three copies (PDF)
The Mail Carrier	Grade 2	community helpers, nonfiction	129	● ▲ ■ three copies (PDF)
The Mayor Who Hired a Rain Cloud	Grade 2	a cloud that follows a mayor, fiction	134	● ▲ ■ three copies (PDF)
The Missing Number on Door Twelve	Grade 2	a number puzzle in a hallway, fiction	135	● ▲ ■ three copies (PDF)
The Mole and the Lantern Moths	Grade 2	a mole who shares, fiction	130	● ▲ ■ three copies (PDF)
The Moon Always Shows Us One Face	Grade 2	the near and far side of the moon, nonfiction	125	● ▲ ■ three copies (PDF)
The Moth Who Wanted Stripes	Grade 2	a moth who wants to look different, fiction	125	● ▲ ■ three copies (PDF)
The Mule Who Wore Mittens in July	Grade 2	a mule with cold hooves, fiction	122	● ▲ ■ three copies (PDF)
The Night Train to Cedar Falls	Grade 2	an overnight train trip, fiction	136	● ▲ ■ three copies (PDF)
The Octopus Hides in Plain Sight	Grade 2	octopus camouflage, nonfiction	148	● ▲ ■ three copies (PDF)
The Otter Who Lost His Lucky Rock	Grade 2	an otter learns to ask for help, fiction	131	● ▲ ■ three copies (PDF)
The Pattern Rule in a Quilt	Grade 2	repeating patterns, nonfiction	133	● ▲ ■ three copies (PDF)
The Peanut Plant Digs In	Grade 2	how peanuts grow underground, nonfiction	103	● ▲ ■ three copies (PDF)
The Pelican and the Giant Fish	Grade 2	a pelican who takes too much, fiction	134	● ▲ ■ three copies (PDF)
The Road Lined With Bottle-Shaped Trees	Grade 2	baobab trees in madagascar, nonfiction	92	● ▲ ■ three copies (PDF)
The Salmon Who Swim Home Up the River	Grade 2	salmon journey, nonfiction	128	● ▲ ■ three copies (PDF)
The Salt Flat That Turns Into a Mirror	Grade 2	a giant salt flat in bolivia, nonfiction	124	● ▲ ■ three copies (PDF)
The Secret Knock at the Treehouse	Grade 2	a secret password, fiction	134	● ▲ ■ three copies (PDF)
The Shadow That Shrinks at Lunchtime	Grade 2	shadow length and the sun, nonfiction	122	● ▲ ■ three copies (PDF)
The Singing Teakettle Mystery	Grade 2	a strange sound in a kitchen, fiction	144	● ▲ ■ three copies (PDF)
The Snail Who Raced the Rain	Grade 2	a snail and a promise, fiction	134	● ▲ ■ three copies (PDF)
The Sound Artist Who Cracks Celery	Grade 2	movie sound effects worker, nonfiction	133	● ▲ ■ three copies (PDF)
The Sparrow and the Silent Bell	Grade 2	a sparrow who listens, fiction	129	● ▲ ■ three copies (PDF)
The Spelling Bee That Really Buzzed	Grade 2	real bees at a spelling contest, fiction	127	● ▲ ■ three copies (PDF)
The Sun Gives Us Light and Heat	Grade 2	the sun, nonfiction	98	● ▲ ■ three copies (PDF)
The Walk Button Sends a Message	Grade 2	crosswalk signals, nonfiction	120	● ▲ ■ three copies (PDF)
The Walrus Who Ran the Laundromat	Grade 2	a walrus and a washing shop, fiction	137	● ▲ ■ three copies (PDF)
The Water Cycle	Grade 2	weather and water, nonfiction	116	● ▲ ■ three copies (PDF)
The Wiggly Tooth Plan	Grade 2	baby teeth and grown-up teeth, nonfiction	129	● ▲ ■ three copies (PDF)
The Wobbly Tooth	Grade 2	losing a tooth, fiction	112	● ▲ ■ three copies (PDF)
Tomas and the Sandy Long Jump Pit	Grade 2	practicing the long jump, fiction	132	● ▲ ■ three copies (PDF)
Tweezers Pinch with Two Springy Arms	Grade 2	tweezers and levers, nonfiction	147	● ▲ ■ three copies (PDF)
Two Cousins, One Hammock	Grade 2	cousins sharing a hammock, fiction	143	● ▲ ■ three copies (PDF)
Two Foxes, Two Homes	Grade 2	arctic fox and desert fox, nonfiction	141	● ▲ ■ three copies (PDF)
Uranus Rolls Like a Ball	Grade 2	the tilted planet uranus, nonfiction	107	● ▲ ■ three copies (PDF)
Vanilla Flowers Open for a Day	Grade 2	how vanilla beans are made, nonfiction	120	● ▲ ■ three copies (PDF)
Venus Is Hotter Than Mercury	Grade 2	the planet venus, nonfiction	120	● ▲ ■ three copies (PDF)
Water for Your Body	Grade 2	health and water, nonfiction	118	● ▲ ■ three copies (PDF)
Wes Whistles While We Work	Grade 2	a friend who whistles all the time, fiction	150	● ▲ ■ three copies (PDF)
What a Magnet Will Not Pick Up	Grade 2	what magnets attract, nonfiction	122	● ▲ ■ three copies (PDF)
Where Did the Sugar Go in the Tea?	Grade 2	sugar dissolving in water, nonfiction	119	● ▲ ■ three copies (PDF)
Where Does the Morning Dew Come From?	Grade 2	morning dew, nonfiction	124	● ▲ ■ three copies (PDF)
Why a Bell Keeps Ringing After a Hit	Grade 2	how bells ring, nonfiction	112	● ▲ ■ three copies (PDF)
Why a Bike Reflector Glows at Night	Grade 2	bicycle reflectors, nonfiction	144	● ▲ ■ three copies (PDF)
Why a Cello Is Bigger Than a Violin	Grade 2	cello and violin, nonfiction	110	● ▲ ■ three copies (PDF)
Why Astronauts Eat Tortillas	Grade 2	food in a spaceship, nonfiction	106	● ▲ ■ three copies (PDF)
Why Beach Pebbles Feel So Smooth	Grade 2	smooth beach stones, nonfiction	131	● ▲ ■ three copies (PDF)
Why Cooks Stir With Wooden Spoons	Grade 2	heat moving through spoons, nonfiction	132	● ▲ ■ three copies (PDF)
Why Deserts Get Cold at Night	Grade 2	desert temperature, nonfiction	131	● ▲ ■ three copies (PDF)
Why Dogs Wear Leashes at the Duck Pond	Grade 2	park rules for pets, nonfiction	125	● ▲ ■ three copies (PDF)
Why Pancakes Make Bubbles	Grade 2	bubbles in pancake batter, nonfiction	121	● ▲ ■ three copies (PDF)
Why Sleds Slide and Sandpaper Grips	Grade 2	friction, nonfiction	127	● ▲ ■ three copies (PDF)
Why Some Birds Fly South	Grade 2	bird migration, nonfiction	133	● ▲ ■ three copies (PDF)
Why Space Has No Sounds	Grade 2	sound and air in space, nonfiction	107	● ▲ ■ three copies (PDF)
Why Squirrels Bury Nuts	Grade 2	squirrels saving food, nonfiction	132	● ▲ ■ three copies (PDF)
Why Stagehands Wear Black	Grade 2	theater stagehands, nonfiction	111	● ▲ ■ three copies (PDF)
Why the Night Baker Starts at Midnight	Grade 2	bread baker night shift, nonfiction	143	● ▲ ■ three copies (PDF)
Why the World Spins After You Stop	Grade 2	balance and dizziness, nonfiction	127	● ▲ ■ three copies (PDF)
Why Too Many Paints Make Mud	Grade 2	mixing paint colors, nonfiction	120	● ▲ ■ three copies (PDF)
Wren Maps the Creek Behind the School	Grade 2	drawing a map of a creek, fiction	131	● ▲ ■ three copies (PDF)
Your Bones Hold You Up	Grade 2	the human body, nonfiction	114	● ▲ ■ three copies (PDF)
A Flag That Says Who We Are	Grade 3	designing a town flag, nonfiction	167	● ▲ ■ three copies (PDF)
A Flip Book Makes a Picture Move	Grade 3	flip book animation, nonfiction	148	● ▲ ■ three copies (PDF)
A Hundred Paper Cranes for Room Twelve	Grade 3	folding origami cranes, fiction	158	● ▲ ■ three copies (PDF)
A Letter About Uncle Rudy's Sneeze	Grade 3	a letter about a giant sneeze, fiction	144	● ▲ ■ three copies (PDF)
A Magnet Can Reach Through Paper	Grade 3	magnets working through objects, nonfiction	175	● ▲ ■ three copies (PDF)
A Mobile Is a Balancing Act	Grade 3	hanging mobiles, nonfiction	160	● ▲ ■ three copies (PDF)
A Mushroom Is Not a Plant	Grade 3	what mushrooms are, nonfiction	159	● ▲ ■ three copies (PDF)
A Quilt Made from Scraps	Grade 3	patchwork quilts, nonfiction	139	● ▲ ■ three copies (PDF)
A Stonemason Builds a Wall That Stays Put	Grade 3	stonemason, nonfiction	152	● ▲ ■ three copies (PDF)
A Telescope That Floats Above the Air	Grade 3	space telescope, nonfiction	175	● ▲ ■ three copies (PDF)
A Tortoise Named Gravel Moves In	Grade 3	a new stepbrother and his pet, fiction	208	● ▲ ■ three copies (PDF)
A Walk, a Dog, and Burrs That Became Hook Tape	Grade 3	the invention of hook and loop tape, nonfiction	163	● ▲ ■ three copies (PDF)
Ants Work as a Team	Grade 3	ants and colonies, nonfiction	141	● ▲ ■ three copies (PDF)
Barnacles: Rock Dwellers Between the Tides	Grade 3	barnacles and the tide, nonfiction	147	● ▲ ■ three copies (PDF)
Beacon the Lighthouse Robot	Grade 3	a robot keeping a lighthouse, fiction	157	● ▲ ■ three copies (PDF)
Bees Fan Their Wings to Thicken Honey	Grade 3	how bees make honey, nonfiction	143	● ▲ ■ three copies (PDF)
Biscuit the Parrot at the Spelling Bee	Grade 3	a parrot on pet day, fiction	135	● ▲ ■ three copies (PDF)
Busy Beavers Build a Pond	Grade 3	beaver dams and lodges, nonfiction	167	● ▲ ■ three copies (PDF)
Calluses: Tough Skin You Grow Yourself	Grade 3	calluses and skin, nonfiction	161	● ▲ ■ three copies (PDF)
Chocolate Begins in a Pod on a Trunk	Grade 3	where chocolate comes from, nonfiction	146	● ▲ ■ three copies (PDF)
Cleanup Day at Willow Creek	Grade 3	volunteer creek cleanup, nonfiction	161	● ▲ ■ three copies (PDF)
Cool Dark Spots on the Sun	Grade 3	sunspots, nonfiction	164	● ▲ ■ three copies (PDF)
Curds and Whey Are Cheese in the Making	Grade 3	how cheese is made, nonfiction	146	● ▲ ■ three copies (PDF)
Cutting Ice from the Pond for Summer	Grade 3	ice before refrigerators, nonfiction	165	● ▲ ■ three copies (PDF)
Dad's Parking Lot Song	Grade 3	a dad who sings loudly at school pickup, fiction	216	● ▲ ■ three copies (PDF)
Dot the Snail Delivers a Birthday Card	Grade 3	a very slow mail carrier, fiction	151	● ▲ ■ three copies (PDF)
Dots That Mix Inside Your Eyes	Grade 3	painting with dots, nonfiction	155	● ▲ ■ three copies (PDF)
Double Dutch Needs a Third Turner	Grade 3	double dutch jump rope, fiction	163	● ▲ ■ three copies (PDF)
Farmer Nell and the Ticklish Cloud	Grade 3	a tall tale about giant corn, fiction	142	● ▲ ■ three copies (PDF)
Find the Hole in Your Eye's Picture	Grade 3	the blind spot, nonfiction	182	● ▲ ■ three copies (PDF)
Finding Islands Without a Map	Grade 3	pacific island sailors, nonfiction	163	● ▲ ■ three copies (PDF)
Floating Paint and Marbled Paper	Grade 3	paper marbling, nonfiction	137	● ▲ ■ three copies (PDF)
Fractions in the Kitchen	Grade 3	fractions, nonfiction	149	● ▲ ■ three copies (PDF)
From Eye Test to Glasses: The Lens Maker's Day	Grade 3	eyeglass lens maker, nonfiction	147	● ▲ ■ three copies (PDF)
Gearbox Learns to Knit Mittens	Grade 3	a robot who learns to knit, fiction	154	● ▲ ■ three copies (PDF)
Goalie Pads Two Sizes Too Big	Grade 3	a first day as goalie, fiction	168	● ▲ ■ three copies (PDF)
Growing Lettuce on the Space Station	Grade 3	plants in space, nonfiction	188	● ▲ ■ three copies (PDF)
Gus and the Wrong Laundry Bag	Grade 3	two laundry bags mixed up, fiction	159	● ▲ ■ three copies (PDF)
How a Bookbinder Sews a Book Together	Grade 3	bookbinding, nonfiction	136	● ▲ ■ three copies (PDF)
How a Cracked Bone Builds Itself Back	Grade 3	healing bones, nonfiction	154	● ▲ ■ three copies (PDF)
How a Lever Works	Grade 3	simple machines, nonfiction	157	● ▲ ■ three copies (PDF)
How a Library Keeps Books in Order	Grade 3	libraries, nonfiction	158	● ▲ ■ three copies (PDF)
How a Street Gets Its Name	Grade 3	naming streets, nonfiction	150	● ▲ ■ three copies (PDF)
How Bats Find Food in the Dark	Grade 3	echolocation, nonfiction	136	● ▲ ■ three copies (PDF)
How Bears Get Through the Winter	Grade 3	bear winter sleep, nonfiction	179	● ▲ ■ three copies (PDF)
How Beavers Turn a Stream into a Pond	Grade 3	beaver dams and ponds, nonfiction	148	● ▲ ■ three copies (PDF)
How Bees Make Honey	Grade 3	animals and food, nonfiction	162	● ▲ ■ three copies (PDF)
How Camels Handle the Desert	Grade 3	camel desert adaptations, nonfiction	163	● ▲ ■ three copies (PDF)
How Stained Glass Windows Get Their Glow	Grade 3	stained glass, nonfiction	141	● ▲ ■ three copies (PDF)
How to Build a Rain Gauge from a Bottle	Grade 3	measuring rain at home, nonfiction	169	● ▲ ■ three copies (PDF)
How to Build a Tin Can Telephone	Grade 3	sound vibrations on a string, nonfiction	181	● ▲ ■ three copies (PDF)
How to Teach Your Shoes to Tie Themselves	Grade 3	a silly how-to about shoelaces, fiction	156	● ▲ ■ three copies (PDF)
How to Watch Birds in Your Yard	Grade 3	backyard bird watching, nonfiction	191	● ▲ ■ three copies (PDF)
How to Write a Letter to the Mayor	Grade 3	writing to a town leader, nonfiction	161	● ▲ ■ three copies (PDF)
Io, the Moon with Fiery Mountains	Grade 3	jupiter's moon io, nonfiction	187	● ▲ ■ three copies (PDF)
Jellyfish: A Sea Animal With No Brain	Grade 3	how jellyfish live, nonfiction	163	● ▲ ■ three copies (PDF)
Jobs in an Ant Colony	Grade 3	ant colony teamwork, nonfiction	185	● ▲ ■ three copies (PDF)
Keeping the Beat	Grade 3	beat and rhythm in music, nonfiction	163	● ▲ ■ three copies (PDF)
Learning to Whistle Took All Week	Grade 3	learning to whistle, fiction	158	● ▲ ■ three copies (PDF)
Make a Moon Phase Chart with Cookies	Grade 3	moon phases how-to, nonfiction	206	● ▲ ■ three copies (PDF)
Many Apple Trees Need a Partner	Grade 3	apple pollination, nonfiction	141	● ▲ ■ three copies (PDF)
Maple Sap Is Almost Like Water	Grade 3	making maple syrup, nonfiction	136	● ▲ ■ three copies (PDF)
Monarch Butterflies on the Move	Grade 3	animal migration, nonfiction	127	● ▲ ■ three copies (PDF)
Music from an Oil Barrel	Grade 3	steel pan drums, nonfiction	145	● ▲ ■ three copies (PDF)
Ollie and the Raining Cats and Dogs	Grade 3	sayings taken word for word, fiction	158	● ▲ ■ three copies (PDF)
Only Rain Belongs in the Storm Drain	Grade 3	storm drains and clean water, nonfiction	161	● ▲ ■ three copies (PDF)
Oxbow Lakes: When a River Takes a Shortcut	Grade 3	how oxbow lakes form, nonfiction	175	● ▲ ■ three copies (PDF)
Packing a Wheelbarrow the Smart Way	Grade 3	the wheelbarrow as a lever, nonfiction	168	● ▲ ■ three copies (PDF)
Painting a Stage with Light	Grade 3	stage lighting, nonfiction	151	● ▲ ■ three copies (PDF)
Paper Made from Reeds on the Nile	Grade 3	ancient egyptian writing, nonfiction	151	● ▲ ■ three copies (PDF)
Penguins Huddle Up for Warmth	Grade 3	emperor penguin huddles, nonfiction	158	● ▲ ■ three copies (PDF)
Pip and the Mailbox Village	Grade 3	tiny folk living in a mailbox, fiction	170	● ▲ ■ three copies (PDF)
Poll Workers Run Election Day	Grade 3	poll workers, nonfiction	161	● ▲ ■ three copies (PDF)
Quiet Hours on Maple Court	Grade 3	noise rules at night, nonfiction	173	● ▲ ■ three copies (PDF)
Quinoa Seeds Wear a Bitter Coat	Grade 3	quinoa seeds, nonfiction	142	● ▲ ■ three copies (PDF)
Read the Ingredients List Like a Detective	Grade 3	reading food labels, nonfiction	164	● ▲ ■ three copies (PDF)
Rocket Stages Drop Away Like Empty Boxes	Grade 3	rocket stages, nonfiction	190	● ▲ ■ three copies (PDF)
Row Seven Has Too Many Weeds	Grade 3	a garden chore, fiction	162	● ▲ ■ three copies (PDF)
Rub Your Hands: Where Does the Warmth Come From?	Grade 3	friction making heat, nonfiction	177	● ▲ ■ three copies (PDF)
Rules and Laws	Grade 3	government and community, nonfiction	156	● ▲ ■ three copies (PDF)
Ruth and the Icy Front Steps	Grade 3	a winter chore, fiction	164	● ▲ ■ three copies (PDF)
Sailing Into the Wind in a Zigzag	Grade 3	how sailboats tack, nonfiction	171	● ▲ ■ three copies (PDF)
Salt Helps Ice Make Ice Cream	Grade 3	freezing ice cream with salt, nonfiction	151	● ▲ ■ three copies (PDF)
Salt Hiding in Rocks: Why the Sea Is Salty	Grade 3	why the ocean is salty, nonfiction	145	● ▲ ■ three copies (PDF)
Sami and the Hand Game Tournament	Grade 3	a new student who speaks little English, fiction	208	● ▲ ■ three copies (PDF)
Sea Otters and Their Stone Tools	Grade 3	sea otter habits, nonfiction	172	● ▲ ■ three copies (PDF)
Sea Otters Wrap Up in Kelp to Nap	Grade 3	sea otters and kelp, nonfiction	149	● ▲ ■ three copies (PDF)
Solids, Liquids, and Gases	Grade 3	matter, nonfiction	151	● ▲ ■ three copies (PDF)
Sorting Letters on a Moving Train	Grade 3	mail trains, nonfiction	161	● ▲ ■ three copies (PDF)
Sunlight Takes an Eight Minute Trip	Grade 3	how fast light travels, nonfiction	194	● ▲ ■ three copies (PDF)
Swim Lanes Work Like Road Rules	Grade 3	sharing the pool with rules, nonfiction	174	● ▲ ■ three copies (PDF)
Telling Time When the Sun Hid	Grade 3	water clocks, nonfiction	161	● ▲ ■ three copies (PDF)
Tess Turns the Rope	Grade 3	a rope turner who never gets to jump, fiction	198	● ▲ ■ three copies (PDF)
The Art Doctor Who Cleans a Painting	Grade 3	art conservator, nonfiction	152	● ▲ ■ three copies (PDF)
The Bagpipe Bag That Never Runs Out of Air	Grade 3	how a bagpipe works, nonfiction	130	● ▲ ■ three copies (PDF)
The Bakery Sign That Lost a Letter	Grade 3	a bakery sign with a missing letter, fiction	138	● ▲ ■ three copies (PDF)
The Beaver Whose Dam Was Too Tall	Grade 3	a beaver builds too much dam, fiction	166	● ▲ ■ three copies (PDF)
The Bell Player Who Uses Fists and Feet	Grade 3	carillon player, nonfiction	150	● ▲ ■ three copies (PDF)
The Chess Knight Moves in an L	Grade 3	learning chess, fiction	164	● ▲ ■ three copies (PDF)
The Class Turtle	Grade 3	friendship and animals, fiction	179	● ▲ ■ three copies (PDF)
The Clay Bowl That Cracked in the Kiln	Grade 3	making a clay bowl, fiction	165	● ▲ ■ three copies (PDF)
The Clock That Ran Backward on Tuesdays	Grade 3	a clock that runs backward, fiction	155	● ▲ ■ three copies (PDF)
The Compass That Pointed at the Cooler	Grade 3	a compass and a magnet, fiction	169	● ▲ ■ three copies (PDF)
The Cricket Who Only Knew One Note	Grade 3	a cricket joins a night chorus, fiction	170	● ▲ ■ three copies (PDF)
The Dragon Who Hiccupped Bubbles	Grade 3	a dragon with bubble hiccups, fiction	145	● ▲ ■ three copies (PDF)
The Extra Minute in Mina's Pocket	Grade 3	a spare minute you can keep, fiction	163	● ▲ ■ three copies (PDF)
The Firefly Who Lost Her Glow	Grade 3	a firefly and patience, fiction	162	● ▲ ■ three copies (PDF)
The First Airplane Flight	Grade 3	inventions and history, nonfiction	172	● ▲ ■ three copies (PDF)
The Food Chain	Grade 3	ecosystems, nonfiction	135	● ▲ ■ three copies (PDF)
The Footprints That Only Went Up the Hill	Grade 3	a snowy hill puzzle, fiction	175	● ▲ ■ three copies (PDF)
The Funny Bone That Is Not a Bone	Grade 3	the funny bone, nonfiction	152	● ▲ ■ three copies (PDF)
The Great Mustard Mix-Up	Grade 3	mustard stirred into tea, fiction	154	● ▲ ■ three copies (PDF)
The Head Rush When You Stand Up Fast	Grade 3	dizziness on standing, nonfiction	168	● ▲ ■ three copies (PDF)
The Hermit Crab Who Swapped Shells	Grade 3	a crab and a too-small shell, fiction	176	● ▲ ■ three copies (PDF)
The Heron and the Shared Shallows	Grade 3	a heron learns to share a pond, fiction	154	● ▲ ■ three copies (PDF)
The Hidden Lip on Every Train Wheel	Grade 3	how train wheels stay on the rails, nonfiction	161	● ▲ ■ three copies (PDF)
The Hidden Pocket in the Fiddle Case	Grade 3	a secret in a fiddle case, fiction	169	● ▲ ■ three copies (PDF)
The Honeybee Dance	Grade 3	how honeybees communicate, nonfiction	165	● ▲ ■ three copies (PDF)
The Humming Mailbox on Fern Lane	Grade 3	a mailbox full of bees, fiction	142	● ▲ ■ three copies (PDF)
The Inca Cords That Held Numbers	Grade 3	inca record keeping, nonfiction	159	● ▲ ■ three copies (PDF)
The Keeper of the Seed Vault	Grade 3	seed bank worker, nonfiction	146	● ▲ ■ three copies (PDF)
The Keystone at the Top of a Stone Bridge	Grade 3	stone arch bridges, nonfiction	149	● ▲ ■ three copies (PDF)
The Kite That Would Not Fly	Grade 3	fixing a problem, fiction	155	● ▲ ■ three copies (PDF)
The Ladle That Left Soup Night	Grade 3	a missing soup ladle, fiction	167	● ▲ ■ three copies (PDF)
The Lamplighter's Evening Round	Grade 3	street lamps long ago, nonfiction	155	● ▲ ■ three copies (PDF)
The Library Book in the Bathtub	Grade 3	telling the truth about a damaged book, fiction	217	● ▲ ■ three copies (PDF)
The Library Clock That Stopped at Ten Past Three	Grade 3	a stopped library clock, fiction	160	● ▲ ■ three copies (PDF)
The Library on Wheels Stops at Your Corner	Grade 3	bookmobiles, nonfiction	155	● ▲ ■ three copies (PDF)
The Llama Who Carried the Mountain Mail	Grade 3	a llama delivers letters, fiction	174	● ▲ ■ three copies (PDF)
The Long Trip of the Water in Your Tap	Grade 3	where tap water comes from, nonfiction	157	● ▲ ■ three copies (PDF)
The Map That Faced Backward	Grade 3	a hand-drawn map to a pond, fiction	167	● ▲ ■ three copies (PDF)
The Middle Seat Schedule	Grade 3	three siblings and one car seat problem, fiction	218	● ▲ ■ three copies (PDF)
The Mole Who Wanted a Telescope	Grade 3	a mole who looks up at stars, fiction	180	● ▲ ■ three copies (PDF)
The Moon Gives the Sea a Tug	Grade 3	ocean tides, nonfiction	171	● ▲ ■ three copies (PDF)
The Note That Only Read in a Mirror	Grade 3	mirror writing, fiction	175	● ▲ ■ three copies (PDF)
The Note Under the Floorboard	Grade 3	leaving a note in an old house, fiction	190	● ▲ ■ three copies (PDF)
The Octopus, Master of Disguise	Grade 3	octopus camouflage, nonfiction	153	● ▲ ■ three copies (PDF)
The Old Mill and Its Giant Water Wheel	Grade 3	water mills that grind grain, nonfiction	156	● ▲ ■ three copies (PDF)
The Pelican and the Borrowed Net	Grade 3	a pelican fixes what she borrowed, fiction	186	● ▲ ■ three copies (PDF)
The Pencil That Drew Lost Things	Grade 3	a pencil that finds lost items, fiction	160	● ▲ ■ three copies (PDF)
The Pickle That Got the Hiccups	Grade 3	a hiccuping pickle, fiction	137	● ▲ ■ three copies (PDF)
The Promise Called an Oath	Grade 3	oath of office, nonfiction	162	● ▲ ■ three copies (PDF)
The Pump With No Home	Grade 3	a bike pump shared by a whole street, fiction	207	● ▲ ■ three copies (PDF)
The Purple Dye from Sea Snails	Grade 3	ancient purple dye, nonfiction	152	● ▲ ■ three copies (PDF)
The Rainy Recess Game	Grade 3	solving boredom, fiction	137	● ▲ ■ three copies (PDF)
The Recorder That Squeaked Like a Mouse	Grade 3	learning the recorder, fiction	149	● ▲ ■ three copies (PDF)
The Rowboat Named Pancake	Grade 3	a rowboat that lost an oar, fiction	170	● ▲ ■ three copies (PDF)
The Seesaw Puzzle: Who Sits Where?	Grade 3	balance on a seesaw, nonfiction	168	● ▲ ■ three copies (PDF)
The Seventh Plank on the Ferry Dock	Grade 3	a clue hidden on a dock, fiction	170	● ▲ ■ three copies (PDF)
The Sloth Who Raced the Rain	Grade 3	a slow sloth beats the storm, fiction	182	● ▲ ■ three copies (PDF)
The Smell That Takes You Back to Grandma's	Grade 3	smell and memory, nonfiction	162	● ▲ ■ three copies (PDF)
The Sound Makers Behind the Movie Screen	Grade 3	movie sound effects, nonfiction	142	● ▲ ■ three copies (PDF)
The Spelling Bee Jitters	Grade 3	feeling nervous, fiction	142	● ▲ ■ three copies (PDF)
The Squirrel Who Hid Too Many Acorns	Grade 3	a squirrel forgets her acorn stash, fiction	177	● ▲ ■ three copies (PDF)
The Star That Stays Put in the North	Grade 3	the north star, nonfiction	167	● ▲ ■ three copies (PDF)
The Tall Lighthouse at Alexandria	Grade 3	an ancient lighthouse, nonfiction	157	● ▲ ■ three copies (PDF)
The Teapot That Remembered Rain	Grade 3	a teapot with a memory, fiction	154	● ▲ ■ three copies (PDF)
The Third Chair at the Lunch Table	Grade 3	a friend with a new friend, fiction	192	● ▲ ■ three copies (PDF)
The Thirsty Bean Plant	Grade 3	caring for a plant, fiction	147	● ▲ ■ three copies (PDF)
The Thumb Piano and Its Buzzing Tongues	Grade 3	thumb piano, nonfiction	147	● ▲ ■ three copies (PDF)
The Tiny Balls Hidden in a Skateboard Wheel	Grade 3	ball bearings and friction, nonfiction	160	● ▲ ■ three copies (PDF)
The Town Inside the Button Tin	Grade 3	a tiny town in a tin, fiction	152	● ▲ ■ three copies (PDF)
The Umbrella That Waited for Puddles	Grade 3	an umbrella that loves puddles, fiction	162	● ▲ ■ three copies (PDF)
The Whistle in Grandpa's Ear	Grade 3	a grandfather's hearing aid at a concert, fiction	194	● ▲ ■ three copies (PDF)
Tides at the Beach	Grade 3	ocean tides, nonfiction	155	● ▲ ■ three copies (PDF)
Tobias and the Giant Tuba Case	Grade 3	carrying a big instrument, fiction	165	● ▲ ■ three copies (PDF)
Wash Day Before Washing Machines	Grade 3	laundry long ago, nonfiction	160	● ▲ ■ three copies (PDF)
Watching for Smoke from a Mountain Tower	Grade 3	fire lookout, nonfiction	143	● ▲ ■ three copies (PDF)
Whales and Fish: Alike but Different	Grade 3	whales compared with fish, nonfiction	170	● ▲ ■ three copies (PDF)
What Your Brain Tidies Up While You Sleep	Grade 3	the sleeping brain, nonfiction	166	● ▲ ■ three copies (PDF)
When the Moon Turns Coppery Red	Grade 3	lunar eclipse, nonfiction	182	● ▲ ■ three copies (PDF)
Where Does Morning Dew on a Spider Web Come From?	Grade 3	dew and condensation, nonfiction	155	● ▲ ■ three copies (PDF)
Where Does the Sugar Go in Your Tea?	Grade 3	dissolving, nonfiction	159	● ▲ ■ three copies (PDF)
Why a Frozen Pond Has Fish Alive Below	Grade 3	ice floating on ponds, nonfiction	150	● ▲ ■ three copies (PDF)
Why a Revolving Door Keeps the Wind Out	Grade 3	how revolving doors work, nonfiction	165	● ▲ ■ three copies (PDF)
Why a Rolling Marble Finally Stops	Grade 3	friction slowing motion, nonfiction	166	● ▲ ■ three copies (PDF)
Why a Spoon Looks Bent in Your Water Glass	Grade 3	light bending in water, nonfiction	158	● ▲ ■ three copies (PDF)
Why Leftovers Hurry to the Fridge	Grade 3	food safety, nonfiction	160	● ▲ ■ three copies (PDF)
Why Manhole Covers Are Round	Grade 3	the shape of manhole covers, nonfiction	168	● ▲ ■ three copies (PDF)
Why Soup Stays Hot in a Vacuum Bottle	Grade 3	how a vacuum bottle works, nonfiction	169	● ▲ ■ three copies (PDF)
Why the Metal Gate Feels Colder Than the Fence	Grade 3	heat moving through materials, nonfiction	165	● ▲ ■ three copies (PDF)
Why the Orchard Grafter Joins Two Trees	Grade 3	orchard grafting, nonfiction	155	● ▲ ■ three copies (PDF)
Why the Wind Turbine Fixer Waits for Calm Days	Grade 3	wind turbine technician, nonfiction	149	● ▲ ■ three copies (PDF)
Why We Brush Our Teeth	Grade 3	dental health, nonfiction	132	● ▲ ■ three copies (PDF)
Why We Need Sleep	Grade 3	sleep and health, nonfiction	137	● ▲ ■ three copies (PDF)
Why You Sound Odd on a Voice Recording	Grade 3	hearing your own voice, nonfiction	164	● ▲ ■ three copies (PDF)
Why Your Ears Pop on a Mountain Road	Grade 3	ear pressure, nonfiction	152	● ▲ ■ three copies (PDF)
Why Your Shadow Is Long at Breakfast Time	Grade 3	shadow length through the day, nonfiction	194	● ▲ ■ three copies (PDF)
Why Your Voice Sounds Big in the Bathroom	Grade 3	sound bouncing off hard walls, nonfiction	178	● ▲ ■ three copies (PDF)
Worms Turn Banana Peels into Dirt	Grade 3	composting food scraps, nonfiction	138	● ▲ ■ three copies (PDF)
A Backyard Map With a Scale	Grade 4	map scale and distance, nonfiction	211	● ▲ ■ three copies (PDF)
A Fence, Two Yards and a Mediator	Grade 4	solving neighbor disagreements, nonfiction	192	● ▲ ■ three copies (PDF)
A Kite on the Wrong Roof	Grade 4	a lost kite rescue, fiction	206	● ▲ ■ three copies (PDF)
A Pebble's Long Trip Down the Mountain	Grade 4	journey of a rock, nonfiction	186	● ▲ ■ three copies (PDF)
A River Drops Its Mud and Builds Land	Grade 4	river deltas, nonfiction	186	● ▲ ■ three copies (PDF)
A Sociable Weaver Apartment House	Grade 4	birds that build giant nests, nonfiction	224	● ▲ ■ three copies (PDF)
A Spring Hidden in a Safety Pin	Grade 4	safety pins and springs, nonfiction	213	● ▲ ■ three copies (PDF)
A Staircase of Water for Boats	Grade 4	canal locks, nonfiction	211	● ▲ ■ three copies (PDF)
A Weather Buoy Floats at Zero and Zero	Grade 4	latitude and longitude at zero, nonfiction	203	● ▲ ■ three copies (PDF)
Aunt Dorcas and the Zucchini Canoe	Grade 4	a tall tale about a huge zucchini, fiction	212	● ▲ ■ three copies (PDF)
Backward on the Roller Rink	Grade 4	skating backward at a rink, fiction	216	● ▲ ■ three copies (PDF)
Baking Soda and Baking Powder Are Not Twins	Grade 4	kitchen chemistry, nonfiction	179	● ▲ ■ three copies (PDF)
Beans Feed the Soil: A Farmer's Crop Rotation	Grade 4	crop rotation, nonfiction	186	● ▲ ■ three copies (PDF)
Big Bertha and the Runaway Laundry	Grade 4	a tall tale about a sneeze, fiction	206	● ▲ ■ three copies (PDF)
Biscuit and the Missing Shoes	Grade 4	pets and mysteries, fiction	174	● ▲ ■ three copies (PDF)
Biscuit the Hamster Visits a Loud House	Grade 4	a class pet at a noisy house, fiction	189	● ▲ ■ three copies (PDF)
Build a Rain Gauge from a Clear Container	Grade 4	measuring rainfall, nonfiction	190	● ▲ ■ three copies (PDF)
Camels in the Desert	Grade 4	desert animals, nonfiction	164	● ▲ ■ three copies (PDF)
Catching Drinking Water Out of Fog	Grade 4	fog nets, nonfiction	194	● ▲ ■ three copies (PDF)
Colored Patches on the Town Zoning Map	Grade 4	zoning and land use, nonfiction	195	● ▲ ■ three copies (PDF)
Counting the Jelly Beans by Layers	Grade 4	estimating big counts, nonfiction	215	● ▲ ■ three copies (PDF)
Counting with Knots: The Inca Quipu	Grade 4	inca record keeping, nonfiction	183	● ▲ ■ three copies (PDF)
Cranking Up the Well Bucket	Grade 4	wheel and axle cranks, nonfiction	207	● ▲ ■ three copies (PDF)
Cut a Hailstone Open and Count the Layers	Grade 4	how hail grows, nonfiction	181	● ▲ ■ three copies (PDF)
Dung Beetles Follow the Milky Way	Grade 4	how beetles find their way, nonfiction	215	● ▲ ■ three copies (PDF)
Dust Devils Dance Across Hot Fields	Grade 4	small whirlwinds, nonfiction	184	● ▲ ■ three copies (PDF)
Farming on Steps Carved Into a Mountain	Grade 4	terrace farming, nonfiction	172	● ▲ ■ three copies (PDF)
Finding Islands by Stars and Swells	Grade 4	polynesian navigation, nonfiction	169	● ▲ ■ three copies (PDF)
Fossils Tell a Story	Grade 4	earth science, nonfiction	172	● ▲ ■ three copies (PDF)
Four Climates on One Tanzanian Mountain	Grade 4	climate zones on kilimanjaro, nonfiction	180	● ▲ ■ three copies (PDF)
From Candle Flame to Light Bulb	Grade 4	lighting a home over time, nonfiction	178	● ▲ ■ three copies (PDF)
Frozen Ground That Never Thaws	Grade 4	permafrost in cold lands, nonfiction	183	● ▲ ■ three copies (PDF)
Gerald the Sourdough Starter	Grade 4	a new stepbrother, fiction	221	● ▲ ■ three copies (PDF)
Getting the Salt Back from Salty Water	Grade 4	dissolving and evaporation, nonfiction	196	● ▲ ■ three copies (PDF)
Grandpa Orrin's Lighthouse Snore	Grade 4	a tall tale about a loud snore, fiction	209	● ▲ ■ three copies (PDF)
Grandpa's Tuesday Voicemails	Grade 4	missing someone far away, fiction	190	● ▲ ■ three copies (PDF)
Growing a Potato From a Potato	Grade 4	planting potatoes, nonfiction	186	● ▲ ■ three copies (PDF)
Hoodoos Are Rock Pillars Wearing Stone Hats	Grade 4	rock pillars and erosion, nonfiction	176	● ▲ ■ three copies (PDF)
How a Big Magnet Sorts Scrap Metal	Grade 4	magnets and metals, nonfiction	213	● ▲ ■ three copies (PDF)
How a Seesaw Balances a Heavy Friend	Grade 4	levers and balance, nonfiction	229	● ▲ ■ three copies (PDF)
How a Volcano Erupts	Grade 4	earth science, nonfiction	178	● ▲ ■ three copies (PDF)
How a Water Strider Walks on a Pond	Grade 4	surface tension, nonfiction	190	● ▲ ■ three copies (PDF)
How a Wind-Up Toy Saves Up Energy	Grade 4	stored energy, nonfiction	196	● ▲ ■ three copies (PDF)
How Electricity Gets to Your Home	Grade 4	energy and how things work, nonfiction	165	● ▲ ■ three copies (PDF)
How Owls Hunt at Night	Grade 4	animal senses, nonfiction	159	● ▲ ■ three copies (PDF)
How Paper Is Made	Grade 4	how things are made, nonfiction	169	● ▲ ■ three copies (PDF)
How Switzerland Ships Goods Without a Coast	Grade 4	landlocked country trade, nonfiction	181	● ▲ ■ three copies (PDF)
How the Wood Frog Freezes and Thaws	Grade 4	frogs in winter, nonfiction	200	● ▲ ■ three copies (PDF)
I Second the Motion: How a Group Decides	Grade 4	meeting rules, nonfiction	176	● ▲ ■ three copies (PDF)
Kelp Forests: Gardens Under the Waves	Grade 4	kelp forests, nonfiction	196	● ▲ ■ three copies (PDF)
Leafcutter Ants Run a Fungus Farm	Grade 4	ants that farm, nonfiction	202	● ▲ ■ three copies (PDF)
Lighthouse Stairs That Would Not Add Up	Grade 4	a counting puzzle, fiction	204	● ▲ ■ three copies (PDF)
Lightning and Thunder	Grade 4	weather, nonfiction	195	● ▲ ■ three copies (PDF)
Lunch Box Swap in Room Twelve	Grade 4	two matching lunch boxes, fiction	213	● ▲ ■ three copies (PDF)
Making Change at the Store	Grade 4	money math, nonfiction	166	● ▲ ■ three copies (PDF)
Mangroves: Trees That Stand on Stilts	Grade 4	mangrove trees, nonfiction	183	● ▲ ■ three copies (PDF)
Milestones Along a Roman Road	Grade 4	roman roads, nonfiction	164	● ▲ ■ three copies (PDF)
Mix-Up at the Pickle Parade	Grade 4	a parade float mix-up, fiction	212	● ▲ ■ three copies (PDF)
Mudskippers Walk on Mud with Fins	Grade 4	fish that live on land, nonfiction	222	● ▲ ■ three copies (PDF)
Mules on the Towpath of the Erie Canal	Grade 4	canals and travel, nonfiction	188	● ▲ ■ three copies (PDF)
Nell's Hill Ink and the Runaway River	Grade 4	magical ink that makes maps real, fiction	185	● ▲ ■ three copies (PDF)
Nosebleed Plan: Lean, Pinch, Wait	Grade 4	first aid for a nosebleed, nonfiction	196	● ▲ ■ three copies (PDF)
Obsidian Is Glass Made by a Volcano	Grade 4	volcanic glass, nonfiction	181	● ▲ ■ three copies (PDF)
One Fence, Three Gardens	Grade 4	perimeter and area, nonfiction	202	● ▲ ■ three copies (PDF)
One River That Flows Through Many Capitals	Grade 4	the danube river in europe, nonfiction	185	● ▲ ■ three copies (PDF)
One Square of Paper and a Sharp Crease	Grade 4	origami folding, nonfiction	205	● ▲ ■ three copies (PDF)
Paddle Number Seven Hides a Secret	Grade 4	a camp canoe treasure hunt, fiction	179	● ▲ ■ three copies (PDF)
Pancake Pete Paves Maple Lane	Grade 4	a tall tale about a giant pancake, fiction	208	● ▲ ■ three copies (PDF)
Paper from the Papyrus Plant	Grade 4	ancient egyptian paper, nonfiction	155	● ▲ ■ three copies (PDF)
Pipes Tall as Trees: How an Organ Breathes	Grade 4	pipe organ, nonfiction	206	● ▲ ■ three copies (PDF)
Pocket Moon and the Night Shift Lamplighters	Grade 4	lamplighters who fix a dim moon, fiction	169	● ▲ ■ three copies (PDF)
Practice at Home with a Sample Ballot	Grade 4	how to read a ballot, nonfiction	214	● ▲ ■ three copies (PDF)
Railroad Tracks Meet at a Dot	Grade 4	drawing distance, nonfiction	196	● ▲ ■ three copies (PDF)
Reading a Bar Graph	Grade 4	graphs and data, nonfiction	183	● ▲ ■ three copies (PDF)
Reading Glasses for a Nearsighted Dragon	Grade 4	a dragon who cannot see up close, fiction	170	● ▲ ■ three copies (PDF)
Reading the Tide Table Before the Beach	Grade 4	tide tables and time, nonfiction	229	● ▲ ■ three copies (PDF)
Red and Dark Strings Guide a Harpist	Grade 4	harp strings, nonfiction	193	● ▲ ■ three copies (PDF)
Rings of Glass in a Lighthouse	Grade 4	lighthouse lenses, nonfiction	231	● ▲ ■ three copies (PDF)
Room 12 and the Snail Derby	Grade 4	a classroom pet race, fiction	209	● ▲ ■ three copies (PDF)
Saffron: The Spice Picked One Flower at a Time	Grade 4	saffron spice, nonfiction	178	● ▲ ■ three copies (PDF)
Salt Ponds: Sunshine Makes Salt	Grade 4	making sea salt, nonfiction	196	● ▲ ■ three copies (PDF)
Seat 14B and the Missing Ticket	Grade 4	a train trip problem, fiction	190	● ▲ ■ three copies (PDF)
Seeds That Travel	Grade 4	how seeds spread, nonfiction	162	● ▲ ■ three copies (PDF)
Seventeen Pages of Sourdough	Grade 4	baking bread from a starter, fiction	208	● ▲ ■ three copies (PDF)
Singing a Round: Start Late on Purpose	Grade 4	singing in rounds, nonfiction	205	● ▲ ■ three copies (PDF)
Six Weeks in a Rock Tumbler	Grade 4	waiting for a hobby result, fiction	225	● ▲ ■ three copies (PDF)
Slow Drips Build Stone Icicles in Caves	Grade 4	cave formations, nonfiction	176	● ▲ ■ three copies (PDF)
Sticky Notes Along Grandpa's Garden Path	Grade 4	a puzzle trail, fiction	193	● ▲ ■ three copies (PDF)
Stone Steps of the Giant's Causeway	Grade 4	rock columns in northern ireland, nonfiction	192	● ▲ ■ three copies (PDF)
Summer Nights When the Sun Does Not Set	Grade 4	seasons near the poles, nonfiction	174	● ▲ ■ three copies (PDF)
Tally Marks at the Bird Feeder	Grade 4	tally charts and graphs, nonfiction	200	● ▲ ■ three copies (PDF)
Telling Time Before Clocks Had Hands	Grade 4	early ways to tell time, nonfiction	186	● ▲ ■ three copies (PDF)
The Archerfish Spits at Its Supper	Grade 4	fish that hunt with water, nonfiction	183	● ▲ ■ three copies (PDF)
The Bassoon Taller Than Dev	Grade 4	learning a big instrument, fiction	201	● ▲ ■ three copies (PDF)
The Bowerbird and the Plain Gray Feather	Grade 4	pride and kindness, birds, fiction	188	● ▲ ■ three copies (PDF)
The Cave Drawings Behind the Waterfall Trail	Grade 4	a hike and a secret, fiction	197	● ▲ ■ three copies (PDF)
The Cereal Box Showdown	Grade 4	unit price and better buys, nonfiction	203	● ▲ ■ three copies (PDF)
The Chalky Pot That Shines After the Kiln	Grade 4	pottery glaze, nonfiction	205	● ▲ ■ three copies (PDF)
The Clerk Who Writes Down Every Decision	Grade 4	town clerk and records, nonfiction	206	● ▲ ■ three copies (PDF)
The Cliffhanger Notebook	Grade 4	keeping a friend after a move, fiction	194	● ▲ ■ three copies (PDF)
The Clock That Lives in Your Brain	Grade 4	body clock and sleep, nonfiction	204	● ▲ ■ three copies (PDF)
The Cubit and the Wandering Forearm	Grade 4	history of measuring, nonfiction	229	● ▲ ■ three copies (PDF)
The Cuckoo Chick Who Gets a Free Nest	Grade 4	birds that use other nests, nonfiction	199	● ▲ ■ three copies (PDF)
The Desert Where Clouds Rarely Drop Rain	Grade 4	why the atacama desert is dry, nonfiction	183	● ▲ ■ three copies (PDF)
The Dragon at the Lost Mitten Desk	Grade 4	a dragon who runs a lost-and-found, fiction	178	● ▲ ■ three copies (PDF)
The Dung Beetle Who Rolled Straight Home	Grade 4	asking for help, insects, fiction	220	● ▲ ■ three copies (PDF)
The Echo in the Empty Gym	Grade 4	sound and echoes, nonfiction	187	● ▲ ■ three copies (PDF)
The Ferry Bench Riddle	Grade 4	a riddle on a boat, fiction	196	● ▲ ■ three copies (PDF)
The Goat Who Ate the Spelling List	Grade 4	a goat and a spelling test, fiction	207	● ▲ ■ three copies (PDF)
The Goose Face That Stopped the Hiccups	Grade 4	a new baby brother, fiction	204	● ▲ ■ three copies (PDF)
The Great Wall of China	Grade 4	world history, nonfiction	163	● ▲ ■ three copies (PDF)
The Gutter Scoop Contest	Grade 4	a chore turned into a game, fiction	220	● ▲ ■ three copies (PDF)
The Hairs in Your Ear That Cannot Regrow	Grade 4	protecting your hearing, nonfiction	212	● ▲ ■ three copies (PDF)
The Hot Pan Jerk and the Speedy Spinal Cord	Grade 4	reflexes, nonfiction	209	● ▲ ■ three copies (PDF)
The Hum Inside the Flour Bin	Grade 4	a noise mystery, fiction	187	● ▲ ■ three copies (PDF)
The Jar of Ugly Buttons	Grade 4	fixing a mistake with a friend, fiction	210	● ▲ ■ three copies (PDF)
The Kakapo Who Climbed the Tall Rimu	Grade 4	patience, flightless birds, fiction	194	● ▲ ■ three copies (PDF)
The Kangaroo Rat Never Needs a Drink	Grade 4	desert animals and water, nonfiction	214	● ▲ ■ three copies (PDF)
The Laundry Room Sign-Up Sheet	Grade 4	shared spaces and fair rules, nonfiction	197	● ▲ ■ three copies (PDF)
The Leafcutter Ant Who Carried the Wrong Leaf	Grade 4	listening, ant colonies, fiction	206	● ▲ ■ three copies (PDF)
The Left Mitten Mystery	Grade 4	a lost and found puzzle, fiction	223	● ▲ ■ three copies (PDF)
The Lemonade Stand	Grade 4	friendship and money, fiction	216	● ▲ ■ three copies (PDF)
The Mudskipper Who Would Not Swim	Grade 4	being different, mud flats, fiction	190	● ▲ ■ three copies (PDF)
The Music Box Town Needs a New Song	Grade 4	a tiny town inside a music box, fiction	175	● ▲ ■ three copies (PDF)
The New Kid at Lunch	Grade 4	kindness and friendship, fiction	170	● ▲ ■ three copies (PDF)
The Notice on the Pole Before a Big Decision	Grade 4	public notices, nonfiction	217	● ▲ ■ three copies (PDF)
The Ocean's Twilight Zone Elevator	Grade 4	deep ocean migration, nonfiction	187	● ▲ ■ three copies (PDF)
The Panama Hat That Is Made in Ecuador	Grade 4	straw hats from ecuador, nonfiction	172	● ▲ ■ three copies (PDF)
The Pangolin Who Curled Up Too Soon	Grade 4	courage, shy animals, fiction	197	● ▲ ■ three copies (PDF)
The Parrot Who Sounded Like Mr. Finch	Grade 4	a parrot copying the principal, fiction	202	● ▲ ■ three copies (PDF)
The Pika Who Shared Her Haypile	Grade 4	sharing, mountain animals, fiction	198	● ▲ ■ three copies (PDF)
The Pistol Shrimp and Its Watchful Goby	Grade 4	animal partners in the sea, nonfiction	199	● ▲ ■ three copies (PDF)
The Pony Express Riders	Grade 4	mail in the old west, nonfiction	174	● ▲ ■ three copies (PDF)
The Pony Express Rides	Grade 4	American history, nonfiction	162	● ▲ ■ three copies (PDF)
The Pumpkin That Crossed the Fence	Grade 4	neighbors sharing a pumpkin, fiction	206	● ▲ ■ three copies (PDF)
The Robot Who Counted Raindrops	Grade 4	a robot and an impossible counting job, fiction	183	● ▲ ■ three copies (PDF)
The Salt Shaker That Shook Up a Storm	Grade 4	a kitchen salt shaker with weather magic, fiction	174	● ▲ ■ three copies (PDF)
The Savings Jar That Grew a Dollar	Grade 4	interest on savings, nonfiction	196	● ▲ ■ three copies (PDF)
The Scarf That Kept Growing	Grade 4	learning to knit, fiction	221	● ▲ ■ three copies (PDF)
The Secretary Bird's Tall Grass Clock	Grade 4	patience, grassland birds, fiction	189	● ▲ ■ three copies (PDF)
The Sloth's Green Fur Garden	Grade 4	sloths and algae, nonfiction	186	● ▲ ■ three copies (PDF)
The Slow Rise: Bread Dough in a Cold Fridge	Grade 4	yeast and bread, nonfiction	184	● ▲ ■ three copies (PDF)
The Stair Relay for Mrs. Abara	Grade 4	kids helping a neighbor, fiction	204	● ▲ ■ three copies (PDF)
The Staircase With Thirteen and a Half Steps	Grade 4	a house staircase with a secret step, fiction	170	● ▲ ■ three copies (PDF)
The Talent Show Hiccups	Grade 4	stage fright and humor, fiction	171	● ▲ ■ three copies (PDF)
The Tape Line Down the Middle	Grade 4	sisters sharing a bedroom, fiction	214	● ▲ ■ three copies (PDF)
The Tapir and the Borrowed River Voice	Grade 4	honesty, rainforest animals, fiction	201	● ▲ ■ three copies (PDF)
The Three Branches of Government	Grade 4	government, nonfiction	187	● ▲ ■ three copies (PDF)
The Ticking Helper on the Piano	Grade 4	metronome tempo, nonfiction	208	● ▲ ■ three copies (PDF)
The Tidy Streets of Mohenjo-daro	Grade 4	indus valley city, nonfiction	169	● ▲ ■ three copies (PDF)
The Tiny Ball Inside a Pen	Grade 4	ballpoint pens, nonfiction	196	● ▲ ■ three copies (PDF)
The Tiny Ruler Printed on Every Map	Grade 4	using a map scale bar, nonfiction	188	● ▲ ■ three copies (PDF)
The Tongue Map That Never Existed	Grade 4	taste and the tongue, nonfiction	188	● ▲ ■ three copies (PDF)
The Town Clock That Chimed Thirteen	Grade 4	a clock mystery, fiction	188	● ▲ ■ three copies (PDF)
The Treehouse Sign	Grade 4	sharing and teamwork, fiction	189	● ▲ ■ three copies (PDF)
The Triangle Where Numbers Add Up	Grade 4	number patterns in a triangle, nonfiction	188	● ▲ ■ three copies (PDF)
The Tuba Case Card Table	Grade 4	sharing a crowded bus seat, fiction	196	● ▲ ■ three copies (PDF)
The Tuba Player's Missing Mouthpiece	Grade 4	a band room search, fiction	185	● ▲ ■ three copies (PDF)
The Two Cutting Boards Rule	Grade 4	kitchen food safety, nonfiction	203	● ▲ ■ three copies (PDF)
The Waiter Who Swapped His Sounds	Grade 4	a waiter who mixes up sounds, fiction	224	● ▲ ■ three copies (PDF)
The Water Hiding in Sand and Rock	Grade 4	groundwater and wells, nonfiction	194	● ▲ ■ three copies (PDF)
The Wheelbarrow: A Lever on a Wheel	Grade 4	levers in wheelbarrows, nonfiction	205	● ▲ ■ three copies (PDF)
The Whistle That Would Not Come	Grade 4	learning to whistle, fiction	210	● ▲ ■ three copies (PDF)
The Wind-Up Heron Who Carried Whispers	Grade 4	a mechanical bird that delivers secrets, fiction	176	● ▲ ■ three copies (PDF)
The Wombat Who Dug a Door Too Small	Grade 4	planning ahead, burrows, fiction	181	● ▲ ■ three copies (PDF)
The Zipper's Hidden Wedge	Grade 4	how zippers work, nonfiction	188	● ▲ ■ three copies (PDF)
Thousands of Potatoes in the Peruvian Andes	Grade 4	potato farming in peru, nonfiction	200	● ▲ ■ three copies (PDF)
Three Minutes at the Council Microphone	Grade 4	speaking at public meetings, nonfiction	189	● ▲ ■ three copies (PDF)
Three Tiny Bones Behind Your Eardrum	Grade 4	how we hear, nonfiction	182	● ▲ ■ three copies (PDF)
Tide Pool Life: A Home That Floods Twice a Day	Grade 4	tide pools, nonfiction	192	● ▲ ■ three copies (PDF)
Tightening a Kettle Drum to Change Its Note	Grade 4	timpani pitch, nonfiction	212	● ▲ ■ three copies (PDF)
Time Moves Slowly Under Maya's Bed	Grade 4	a place where time runs slowly, fiction	176	● ▲ ■ three copies (PDF)
Two Pickle Methods: Vinegar or Salty Water	Grade 4	pickling food, nonfiction	178	● ▲ ■ three copies (PDF)
Vanilla Flowers and the Helping Human Hand	Grade 4	vanilla pods, nonfiction	177	● ▲ ■ three copies (PDF)
Washing Away Germs	Grade 4	staying healthy, nonfiction	172	● ▲ ■ three copies (PDF)
Wedge Writing on Sumerian Clay Tablets	Grade 4	early writing, nonfiction	172	● ▲ ■ three copies (PDF)
Wen and the Backward Flip Turn	Grade 4	a swimming turn that scares, fiction	226	● ▲ ■ three copies (PDF)
Wendell and the Slippery Idioms	Grade 4	idioms taken the wrong way, fiction	202	● ▲ ■ three copies (PDF)
What Happens Inside Bicycle Brakes	Grade 4	friction and stopping, nonfiction	191	● ▲ ■ three copies (PDF)
What Happens When the Vote Is a Tie?	Grade 4	tie votes, nonfiction	215	● ▲ ■ three copies (PDF)
When Every Town Had Its Own Noon	Grade 4	time zones and trains, nonfiction	220	● ▲ ■ three copies (PDF)
Which Street Does the Snowplow Reach First?	Grade 4	snow plow plans, nonfiction	194	● ▲ ■ three copies (PDF)
Why a Thermos Keeps Soup Hot	Grade 4	insulated bottles, nonfiction	189	● ▲ ■ three copies (PDF)
Why AMBULANCE Is Spelled Backward on the Hood	Grade 4	mirrors and reflection, nonfiction	216	● ▲ ■ three copies (PDF)
Why Arches Hold Up Bridges	Grade 4	arch bridges, nonfiction	223	● ▲ ■ three copies (PDF)
Why Cranberries Float at Harvest Time	Grade 4	cranberry harvest, nonfiction	168	● ▲ ■ three copies (PDF)
Why Hills Need Low Gears	Grade 4	bicycle gears, nonfiction	205	● ▲ ■ three copies (PDF)
Why Leaves Change Color	Grade 4	plants, nonfiction	174	● ▲ ■ three copies (PDF)
Why Red Roses Look Gray at Dusk	Grade 4	seeing in dim light, nonfiction	200	● ▲ ■ three copies (PDF)
Why Sailors Packed Lemons	Grade 4	vitamin c and scurvy, nonfiction	185	● ▲ ■ three copies (PDF)
Why Stage Actors Paint Their Faces Bold	Grade 4	stage makeup, nonfiction	211	● ▲ ■ three copies (PDF)
Why Summer Nights Barely Get Dark in Norway	Grade 4	midnight sun in northern norway, nonfiction	206	● ▲ ■ three copies (PDF)
Why Swiss Cheese Has Holes	Grade 4	how cheese gets holes, nonfiction	180	● ▲ ■ three copies (PDF)
Why the Beach Wind Changes Direction	Grade 4	sea breeze and land breeze, nonfiction	173	● ▲ ■ three copies (PDF)
Why the Letters in a Block Print Face Backward	Grade 4	block printing, nonfiction	198	● ▲ ■ three copies (PDF)
Why the Metal Slide Burns and the Grass Does Not	Grade 4	heat and conductors, nonfiction	193	● ▲ ■ three copies (PDF)
Why Tightrope Walkers Carry a Long Pole	Grade 4	balance and gravity, nonfiction	201	● ▲ ■ three copies (PDF)
Why Water Glasses Play Different Notes	Grade 4	pitch and vibration, nonfiction	198	● ▲ ■ three copies (PDF)
Why Water Towers Stand So High	Grade 4	water towers, nonfiction	175	● ▲ ■ three copies (PDF)
Why You Cannot Tickle Yourself	Grade 4	the brain and touch, nonfiction	174	● ▲ ■ three copies (PDF)
A Clay Rabbit Hops Through Stop-Motion	Grade 5	stop-motion animation, nonfiction	216	● ▲ ■ three copies (PDF)
A Cooper Builds a Barrel Without Glue	Grade 5	barrel makers, nonfiction	208	● ▲ ■ three copies (PDF)
A Fleck of Paint Can Chip a Window	Grade 5	space junk in orbit, nonfiction	230	● ▲ ■ three copies (PDF)
A Glass Thread That Carries Light Around Corners	Grade 5	light inside optical fibers, nonfiction	213	● ▲ ■ three copies (PDF)
A Gross Is Twelve Dozen	Grade 5	dozens, grosses and the number twelve, nonfiction	211	● ▲ ■ three copies (PDF)
A Handbell Choir Needs Every Ringer	Grade 5	handbell choirs, nonfiction	209	● ▲ ■ three copies (PDF)
A Jar of Bubbling Sourdough Starter	Grade 5	sourdough starter, nonfiction	233	● ▲ ■ three copies (PDF)
A Judge Who Cannot Pick a Side	Grade 5	fair and neutral judges, nonfiction	213	● ▲ ■ three copies (PDF)
A Map of My Old Street	Grade 5	sharing a favorite place after moving, fiction	226	● ▲ ■ three copies (PDF)
A Pinhole Makes a Picture on the Wall	Grade 5	the camera obscura, nonfiction	210	● ▲ ■ three copies (PDF)
A Rain Garden Catches Water Before It Runs Off	Grade 5	rain gardens and runoff, nonfiction	197	● ▲ ■ three copies (PDF)
A School Day in One Room	Grade 5	one-room schoolhouses, nonfiction	188	● ▲ ■ three copies (PDF)
A Sloth's Fur Is a Tiny Garden	Grade 5	sloths and algae, nonfiction	194	● ▲ ■ three copies (PDF)
A Squeezed Liquid Lifts a Whole Car	Grade 5	how a hydraulic jack works, nonfiction	223	● ▲ ■ three copies (PDF)
A Survey Ship Listens for Seafloor Echoes	Grade 5	ocean floor mapping, nonfiction	205	● ▲ ■ three copies (PDF)
A Violin Maker Taps Wood and Listens	Grade 5	violin makers, nonfiction	205	● ▲ ■ three copies (PDF)
A Wind Tunnel Technician Makes Air Visible	Grade 5	wind tunnel testing, nonfiction	200	● ▲ ■ three copies (PDF)
Almond Orchards Rent Traveling Beehives	Grade 5	bees and almond blossoms, nonfiction	233	● ▲ ■ three copies (PDF)
Anouk Crosses the Gym Wall Sideways	Grade 5	a first climbing wall traverse, fiction	239	● ▲ ■ three copies (PDF)
At the Time Bank, an Hour Is the Money	Grade 5	neighbors trading hours, nonfiction	201	● ▲ ■ three copies (PDF)
Aunt Bea's Backward Birthday	Grade 5	a birthday done backward, fiction	236	● ▲ ■ three copies (PDF)
Bamboo, the Giant Grass	Grade 5	bamboo, nonfiction	220	● ▲ ■ three copies (PDF)
Betelgeuse Is Orange and Rigel Is Blue	Grade 5	star colors and heat, nonfiction	223	● ▲ ■ three copies (PDF)
Brackish Water: Where a River Meets the Sea	Grade 5	estuaries, nonfiction	186	● ▲ ■ three copies (PDF)
Brain Freeze: The Ice Cream Headache	Grade 5	brain freeze, nonfiction	213	● ▲ ■ three copies (PDF)
Bread Flour and Cake Flour Are Not the Same	Grade 5	kinds of wheat flour, nonfiction	237	● ▲ ■ three copies (PDF)
Breakfast for Dinner on Dad's Night Shift	Grade 5	a parent who works nights, fiction	211	● ▲ ■ three copies (PDF)
Browned Food Gets Its Flavor From Heat	Grade 5	browning and flavor, nonfiction	233	● ▲ ■ three copies (PDF)
Caddisfly Larvae Build Houses to Carry	Grade 5	caddisfly larvae and their cases, nonfiction	221	● ▲ ■ three copies (PDF)
Captain Fumble Sails a Bathtub	Grade 5	a bathtub boat voyage, fiction	255	● ▲ ■ three copies (PDF)
Click, Click: The Ratchet in a Socket Wrench	Grade 5	how a ratchet works, nonfiction	228	● ▲ ■ three copies (PDF)
Cutting Winter Ice for Summer Drinks	Grade 5	ice harvesting and iceboxes, nonfiction	193	● ▲ ■ three copies (PDF)
Desert Cactus, Rainforest Fern	Grade 5	desert and rainforest plants, nonfiction	203	● ▲ ■ three copies (PDF)
Dot Dobbins and the Wandering Hiccup	Grade 5	a hiccup that hops between people, fiction	251	● ▲ ■ three copies (PDF)
Dripping Time: Ancient Water Clocks	Grade 5	ancient water clocks, nonfiction	183	● ▲ ■ three copies (PDF)
Dung Beetles Steer by the Milky Way	Grade 5	dung beetle navigation, nonfiction	215	● ▲ ■ three copies (PDF)
Egg Whites Turn Into Cloud Foam	Grade 5	whipping egg whites, nonfiction	224	● ▲ ■ three copies (PDF)
Eleven Pennies on the Lock Beam	Grade 5	coins at a canal lock, fiction	230	● ▲ ■ three copies (PDF)
Fiber: The Rough Stuff Your Gut Needs	Grade 5	fiber in food, nonfiction	215	● ▲ ■ three copies (PDF)
Finding a Hidden Spot With Latitude and Longitude	Grade 5	map coordinates, nonfiction	200	● ▲ ■ three copies (PDF)
Fish Ladders: Stairs Built for Swimmers	Grade 5	fish and dams, nonfiction	183	● ▲ ■ three copies (PDF)
Five Climates on One Tanzanian Mountain	Grade 5	mountain climate zones, nonfiction	198	● ▲ ■ three copies (PDF)
Four Little Dots Beside Jupiter	Grade 5	Galileo and Jupiter's moons, nonfiction	210	● ▲ ■ three copies (PDF)
Four Painted Stones on Harrow Pond	Grade 5	a number code on stones, fiction	228	● ▲ ■ three copies (PDF)
Four Ropes Make a Heavy Crate Feel Light	Grade 5	block and tackle pulleys, nonfiction	219	● ▲ ■ three copies (PDF)
From Cotton Boll to T-Shirt	Grade 5	how cotton becomes cloth, nonfiction	208	● ▲ ■ three copies (PDF)
Getting Around Venice Without Cars	Grade 5	a city on water, nonfiction	203	● ▲ ■ three copies (PDF)
Giant Staircases Carved Into Hillsides	Grade 5	terraced rice fields, nonfiction	206	● ▲ ■ three copies (PDF)
Glass Slides Numbered Out of Order	Grade 5	old picture slides and a lost projector, fiction	224	● ▲ ■ three copies (PDF)
Green Bananas and the Gas That Ripens Them	Grade 5	ripening bananas, nonfiction	235	● ▲ ■ three copies (PDF)
Hana and the Twelve-Cup Tower	Grade 5	learning cup stacking, fiction	230	● ▲ ■ three copies (PDF)
Hello, Mr. Watson	Grade 5	inventions and history, nonfiction	224	● ▲ ■ three copies (PDF)
Honey Keeps for Ages, but Not for Babies	Grade 5	honey and food safety, nonfiction	228	● ▲ ■ three copies (PDF)
How a Club Rulebook Learns to Change	Grade 5	how amendments work, nonfiction	220	● ▲ ■ three copies (PDF)
How a Crossword Maker Builds a Puzzle Grid	Grade 5	crossword puzzle makers, nonfiction	200	● ▲ ■ three copies (PDF)
How a Hummingbird Sleeps Through Cold Nights	Grade 5	hummingbird torpor, nonfiction	205	● ▲ ■ three copies (PDF)
How a Pulley Lifts a Load	Grade 5	simple machines, nonfiction	238	● ▲ ■ three copies (PDF)
How a Tall Tree Drinks	Grade 5	how trees move water, nonfiction	224	● ▲ ■ three copies (PDF)
How a Thermos Keeps Soup Hot for Hours	Grade 5	how a vacuum flask works, nonfiction	228	● ▲ ■ three copies (PDF)
How Bridges Stay Up	Grade 5	engineering, nonfiction	205	● ▲ ■ three copies (PDF)
How Car Wheels Take a Turn Without Skidding	Grade 5	the car differential, nonfiction	219	● ▲ ■ three copies (PDF)
How Echoes Happen	Grade 5	echoes, nonfiction	231	● ▲ ■ three copies (PDF)
How Glass Is Made	Grade 5	glass, nonfiction	219	● ▲ ■ three copies (PDF)
How Ice Splits Boulders and Breaks Roads	Grade 5	frost wedging, nonfiction	193	● ▲ ■ three copies (PDF)
How Plants Make Food	Grade 5	plants and energy, nonfiction	183	● ▲ ■ three copies (PDF)
How Soap Cleans	Grade 5	soap and germs, nonfiction	213	● ▲ ■ three copies (PDF)
How the Dutch Turned Sea Floor Into Farmland	Grade 5	land below sea level, nonfiction	203	● ▲ ■ three copies (PDF)
Ice Cores: Reading Old Air in a Frozen Layer Cake	Grade 5	ice cores, nonfiction	203	● ▲ ■ three copies (PDF)
Iceland Heats Homes From the Ground	Grade 5	heat from underground, nonfiction	201	● ▲ ■ three copies (PDF)
Inside a Geode: Crystals Hidden in Stone	Grade 5	how geodes form, nonfiction	200	● ▲ ■ three copies (PDF)
Islands Made of Reeds on Lake Titicaca	Grade 5	floating reed islands, nonfiction	207	● ▲ ■ three copies (PDF)
Jumping Spiders See the World in Close-Up	Grade 5	jumping spiders and their eyes, nonfiction	208	● ▲ ■ three copies (PDF)
Jupiter, the Giant Planet	Grade 5	space, nonfiction	221	● ▲ ■ three copies (PDF)
Kelp, the Forest Under the Waves	Grade 5	kelp and seaweed, nonfiction	212	● ▲ ■ three copies (PDF)
Kintsugi: Mending a Bowl with Gold	Grade 5	kintsugi pottery repair, nonfiction	194	● ▲ ■ three copies (PDF)
Lake Baikal, the Deepest Lake in Siberia	Grade 5	the deepest lake, nonfiction	200	● ▲ ■ three copies (PDF)
Lake Turnover: Why Lakes Mix Twice a Year	Grade 5	how lakes mix, nonfiction	198	● ▲ ■ three copies (PDF)
Leif and the Poem About the Owl	Grade 5	memorizing a poem for a recital, fiction	245	● ▲ ■ three copies (PDF)
Letters Between a Mole and a Swallow	Grade 5	letters between two unlike friends, fiction	261	● ▲ ■ three copies (PDF)
Lettuce That Grows Without Dirt	Grade 5	hydroponic farming, nonfiction	244	● ▲ ■ three copies (PDF)
Lighting the Street Lamps at Dusk	Grade 5	gas street lamps, nonfiction	174	● ▲ ■ three copies (PDF)
Living on a Clock That Runs Forty Minutes Late	Grade 5	a day on Mars, nonfiction	232	● ▲ ■ three copies (PDF)
Luggage Tag 52 at Alder Junction	Grade 5	finding the owner of a lost case, fiction	226	● ▲ ■ three copies (PDF)
Mateo and the Stuck Kite	Grade 5	kite and a tall tree, fiction	231	● ▲ ■ three copies (PDF)
Mateo Gets Lost on Purpose	Grade 5	a first orienteering meet, fiction	236	● ▲ ■ three copies (PDF)
Mean, Median, and Mode	Grade 5	averages in math, nonfiction	221	● ▲ ■ three copies (PDF)
Measuring the Sea With a Rope and a Lump of Lead	Grade 5	old ways to measure depth, nonfiction	203	● ▲ ■ three copies (PDF)
Milk Sugar and the Missing Helper	Grade 5	lactose and digestion, nonfiction	221	● ▲ ■ three copies (PDF)
Mortimer the Parrot Shouts Overdue	Grade 5	a parrot in a quiet library, fiction	230	● ▲ ■ three copies (PDF)
Mr. Wick Takes Every Word Literally	Grade 5	a substitute teacher and idioms, fiction	284	● ▲ ■ three copies (PDF)
Mushrooms and the Hidden Web	Grade 5	fungi and mushrooms, nonfiction	210	● ▲ ■ three copies (PDF)
My Brother's First Word Was Gigi	Grade 5	a baby's first word, fiction	216	● ▲ ■ three copies (PDF)
Names on a Petition for a Crosswalk	Grade 5	how a petition works, nonfiction	207	● ▲ ■ three copies (PDF)
Noon Is Not Always at Twelve O'Clock	Grade 5	noon, the sun and time zones, nonfiction	253	● ▲ ■ three copies (PDF)
Noor Pulls the Curtain on Cue Seven	Grade 5	working backstage on a school play, fiction	232	● ▲ ■ three copies (PDF)
Odessa and the Last Face of the Cube	Grade 5	solving a puzzle cube, fiction	238	● ▲ ■ three copies (PDF)
One Tea Plant, Many Teas	Grade 5	how tea is processed, nonfiction	240	● ▲ ■ three copies (PDF)
Pablo Races the Clouds with a Clothesline	Grade 5	hanging laundry before the rain, fiction	238	● ▲ ■ three copies (PDF)
Pack It Right: Heavy Things Close to Your Back	Grade 5	backpack safety, nonfiction	230	● ▲ ■ three copies (PDF)
Pancakes Pay for the Fire Hose	Grade 5	volunteer fire companies, nonfiction	201	● ▲ ■ three copies (PDF)
Penelope Pratt Whispers to Turnips	Grade 5	a tall tale about a giant turnip, fiction	253	● ▲ ■ three copies (PDF)
Percents in Everyday Life	Grade 5	percents, nonfiction	196	● ▲ ■ three copies (PDF)
Planning a Sunny Vegetable Bed	Grade 5	starting a vegetable garden, nonfiction	213	● ▲ ■ three copies (PDF)
Playing the Theremin Without Touching It	Grade 5	the theremin, nonfiction	216	● ▲ ■ three copies (PDF)
Pumice: The Rock That Floats on Water	Grade 5	pumice, nonfiction	201	● ▲ ■ three copies (PDF)
Pushing a Swing at Just the Right Moment	Grade 5	timing pushes to a rhythm, nonfiction	212	● ▲ ■ three copies (PDF)
Reading a Bean Plant's Line Graph	Grade 5	line graphs and change over time, nonfiction	221	● ▲ ■ three copies (PDF)
Reading the Knots: Inca Cord Records	Grade 5	inca quipu records, nonfiction	163	● ▲ ■ three copies (PDF)
Rings of Light Around the Moon	Grade 5	moon halos, nonfiction	214	● ▲ ■ three copies (PDF)
Roman Roads Built Layer by Layer	Grade 5	how roman roads were built, nonfiction	186	● ▲ ■ three copies (PDF)
School by Radio in the Australian Outback	Grade 5	outback schooling, nonfiction	204	● ▲ ■ three copies (PDF)
Scribe School on Clay Tablets	Grade 5	mesopotamian scribe school, nonfiction	180	● ▲ ■ three copies (PDF)
Seagrass: Meadows That Hold the Sea Floor	Grade 5	seagrass meadows, nonfiction	193	● ▲ ■ three copies (PDF)
Split Sticks That Kept the Books	Grade 5	english tally sticks, nonfiction	181	● ▲ ■ three copies (PDF)
Squeezed Snow: How a Glacier Is Born	Grade 5	how glaciers form, nonfiction	186	● ▲ ■ three copies (PDF)
Stalactites and Stalagmites: Drip by Drip	Grade 5	cave formations, nonfiction	210	● ▲ ■ three copies (PDF)
Supply and Demand	Grade 5	economics, nonfiction	176	● ▲ ■ three copies (PDF)
Swirling Colors on a Soap Bubble	Grade 5	thin films and light, nonfiction	210	● ▲ ■ three copies (PDF)
Swollen Glands: Checkpoints in Your Neck	Grade 5	lymph nodes and germs, nonfiction	229	● ▲ ■ three copies (PDF)
Tavi Reads the Morning Announcements	Grade 5	reading names on the school intercom, fiction	234	● ▲ ■ three copies (PDF)
The Afternoon That Got Misplaced	Grade 5	a missing afternoon, fiction	248	● ▲ ■ three copies (PDF)
The Alphorn Calls Across a Mountain Valley	Grade 5	the alphorn, nonfiction	208	● ▲ ■ three copies (PDF)
The Bank Account That Paid Rent on Money	Grade 5	savings accounts and interest, nonfiction	210	● ▲ ■ three copies (PDF)
The Big Bag That Cost More Per Pound	Grade 5	unit price at the grocery store, nonfiction	206	● ▲ ■ three copies (PDF)
The Boots That Only Knew Old Roads	Grade 5	boots that walk to known places, fiction	258	● ▲ ■ three copies (PDF)
The Borrowed Bicycle Bell	Grade 5	returning a broken thing to a friend, fiction	227	● ▲ ■ three copies (PDF)
The Bottle That Held Only a Seed	Grade 5	a riddle on the beach, fiction	233	● ▲ ■ three copies (PDF)
The Bowerbird's Decorated Stage	Grade 5	bowerbirds and their displays, nonfiction	206	● ▲ ■ three copies (PDF)
The Canyon Echo Who Heard It Wrong	Grade 5	an echo that changes words, fiction	248	● ▲ ■ three copies (PDF)
The Chore Wheel Rebellion	Grade 5	fair chores for three siblings, fiction	218	● ▲ ■ three copies (PDF)
The Clock That Only Ticked on Tuesdays	Grade 5	a spare hour on Tuesdays, fiction	232	● ▲ ■ three copies (PDF)
The Copper Rooster Stuck on North	Grade 5	a stuck weather vane, fiction	216	● ▲ ■ three copies (PDF)
The Cricket Judge of Marble Hollow	Grade 5	a cricket settles a crumb quarrel, fiction	253	● ▲ ■ three copies (PDF)
The Crossing Robot Who Learned to Say Maybe	Grade 5	a robot crossing guard, fiction	231	● ▲ ■ three copies (PDF)
The Dragon Who Learned to Breathe Softly	Grade 5	a dragon and a cold bakery, fiction	232	● ▲ ■ three copies (PDF)
The Dresser Who Helps Actors Change in Seconds	Grade 5	backstage costume dressers, nonfiction	197	● ▲ ■ three copies (PDF)
The Dry Side of the Mountain	Grade 5	rain shadow, nonfiction	191	● ▲ ■ three copies (PDF)
The Egg Timer Treaty	Grade 5	stepsiblings sharing a bathroom, fiction	218	● ▲ ■ three copies (PDF)
The Forecaster Who Reads Layers of Snow	Grade 5	avalanche forecasters, nonfiction	205	● ▲ ■ three copies (PDF)
The Garden Robot and the Wild Corner	Grade 5	a robot that will not pull weeds, fiction	243	● ▲ ■ three copies (PDF)
The Hedgehog Salesman and the Desert Fox	Grade 5	a hedgehog tries to sell umbrellas, fiction	255	● ▲ ■ three copies (PDF)
The Ibex and the Crumbling Ledge	Grade 5	a mountain goat asks for help, fiction	232	● ▲ ■ three copies (PDF)
The Inspector Who Checks the Stair Railing	Grade 5	building inspectors and codes, nonfiction	223	● ▲ ■ three copies (PDF)
The Inspector's Sticker on the Grocery Scale	Grade 5	weights and measures inspectors, nonfiction	199	● ▲ ■ three copies (PDF)
The Jar of Orphan Screws	Grade 5	sorting a jar of loose screws, fiction	228	● ▲ ■ three copies (PDF)
The Journey of Milk From Cow to Carton	Grade 5	pasteurized milk, nonfiction	225	● ▲ ■ three copies (PDF)
The Kiln Shelf Mix-Up	Grade 5	a pottery mix-up between friends, fiction	247	● ▲ ■ three copies (PDF)
The Last Lap	Grade 5	sports and friendship, fiction	241	● ▲ ■ three copies (PDF)
The Left-Shoe Shop on Maple Street	Grade 5	a shoe shop mix-up, fiction	263	● ▲ ■ three copies (PDF)
The Lemon Tree Swap	Grade 5	neighbors who share, fiction	236	● ▲ ■ three copies (PDF)
The Lighthouse Inside Grandpa's Teapot	Grade 5	a tiny sea in a teapot, fiction	240	● ▲ ■ three copies (PDF)
The Magpie's Button Jar	Grade 5	a magpie returns what she took, fiction	243	● ▲ ■ three copies (PDF)
The Mailbox Mix-Up on Pudding Lane	Grade 5	letters delivered to wrong houses, fiction	240	● ▲ ■ three copies (PDF)
The Metal Path That Guides Lightning Down	Grade 5	how lightning rods protect, nonfiction	205	● ▲ ■ three copies (PDF)
The Million Dollar House That Fooled the Mean	Grade 5	mean, median and outliers, nonfiction	212	● ▲ ■ three copies (PDF)
The Moon Looks Giant Near the Rooftops	Grade 5	the moon illusion, nonfiction	242	● ▲ ■ three copies (PDF)
The Night Orion Lost His Belt	Grade 5	a missing patch of stars, fiction	219	● ▲ ■ three copies (PDF)
The Notary Who Watches You Sign	Grade 5	what a notary public does, nonfiction	214	● ▲ ■ three copies (PDF)
The Octopus and Its Color-Changing Skin	Grade 5	octopus camouflage, nonfiction	207	● ▲ ■ three copies (PDF)
The Octopus Who Could Not Choose a Color	Grade 5	an octopus tries to please everyone, fiction	239	● ▲ ■ three copies (PDF)
The Orchestra Librarian Marks Every Bow Stroke	Grade 5	orchestra librarians, nonfiction	190	● ▲ ■ three copies (PDF)
The Overdue Book in the Return Slot	Grade 5	a very late library book, fiction	235	● ▲ ■ three copies (PDF)
The Quarter Day Left Over Every Year	Grade 5	leap years and the calendar, nonfiction	222	● ▲ ■ three copies (PDF)
The Quilt Square With Red Thread	Grade 5	a map stitched into a quilt, fiction	231	● ▲ ■ three copies (PDF)
The Ruler Drop Reaction Test	Grade 5	reaction time, nonfiction	228	● ▲ ■ three copies (PDF)
The Slingshot That Saves Rocket Fuel	Grade 5	gravity assist for spacecraft, nonfiction	226	● ▲ ■ three copies (PDF)
The Slow March of a Sand Dune	Grade 5	how dunes move, nonfiction	209	● ▲ ■ three copies (PDF)
The Snap of the Venus Flytrap	Grade 5	carnivorous plants, nonfiction	213	● ▲ ■ three copies (PDF)
The Sneezing Dragon of Quill Street	Grade 5	a dragon with paper dust allergies, fiction	241	● ▲ ■ three copies (PDF)
The Soup Thermos Trade	Grade 5	sharing different lunches, fiction	215	● ▲ ■ three copies (PDF)
The Spadefoot Toad Waits Under the Desert	Grade 5	spadefoot toads and rain pools, nonfiction	230	● ▲ ■ three copies (PDF)
The Spiral Pump That Lifts Water Uphill	Grade 5	the Archimedes screw, nonfiction	203	● ▲ ■ three copies (PDF)
The Substitute Bus Driver	Grade 5	a new driver and a missed stop, fiction	255	● ▲ ■ three copies (PDF)
The Sundial That Ran an Hour Slow	Grade 5	a sundial and summer clocks, fiction	230	● ▲ ■ three copies (PDF)
The Technician Who Counts Pollen Grains	Grade 5	pollen counting, nonfiction	193	● ▲ ■ three copies (PDF)
The Thimble Embassy in Grandma's Sewing Box	Grade 5	two tiny kingdoms in a sewing box, fiction	265	● ▲ ■ three copies (PDF)
The Tiny Pins on a Music Box Drum	Grade 5	how a music box plays a tune, nonfiction	213	● ▲ ■ three copies (PDF)
The Tortoise Who Kept the Ferry Rope	Grade 5	a slow tortoise keeps a ferry safe, fiction	231	● ▲ ■ three copies (PDF)
The Town That Lived in a Sourdough Jar	Grade 5	a tiny town in bread starter, fiction	242	● ▲ ■ three copies (PDF)
The Train Horn That Changes Its Tune	Grade 5	sound waves from moving things, nonfiction	217	● ▲ ■ three copies (PDF)
The Volcano That Would Not Erupt	Grade 5	a science fair problem, fiction	241	● ▲ ■ three copies (PDF)
The Warship Vasa Comes Back Up	Grade 5	the swedish ship vasa, nonfiction	198	● ▲ ■ three copies (PDF)
The Weaver Who Unpicked Her Nest	Grade 5	a weaver bird fixes her nest, fiction	244	● ▲ ■ three copies (PDF)
The Word Detective Who Writes Dictionaries	Grade 5	dictionary writers, nonfiction	195	● ▲ ■ three copies (PDF)
The Yak and the Fog Bell	Grade 5	a yak's bell guides lost goats, fiction	248	● ▲ ■ three copies (PDF)
Thirty Guests and a Pancake Recipe for Six	Grade 5	scaling a recipe with ratios, nonfiction	211	● ▲ ■ three copies (PDF)
Thousands of Potatoes From the Andes	Grade 5	potatoes of the Andes, nonfiction	218	● ▲ ■ three copies (PDF)
Three Cousins and One Lemonade Stand	Grade 5	checks and balances, nonfiction	214	● ▲ ■ three copies (PDF)
Three Minutes at the Crosswalk	Grade 5	walking to school with a new kid, fiction	212	● ▲ ■ three copies (PDF)
Tick, Tock, Catch: The Escapement in a Clock	Grade 5	how an escapement keeps time, nonfiction	221	● ▲ ■ three copies (PDF)
Tuesday's Profit Was Smaller Than It Looked	Grade 5	profit, income and costs, nonfiction	214	● ▲ ■ three copies (PDF)
Turning Kitchen Scraps into Soil	Grade 5	making compost, nonfiction	223	● ▲ ■ three copies (PDF)
Turning Seawater into Drinking Water	Grade 5	removing salt from seawater, nonfiction	193	● ▲ ■ three copies (PDF)
Two Beats Against Three: A Rhythm Puzzle	Grade 5	polyrhythm, nonfiction	206	● ▲ ■ three copies (PDF)
Two Otters and the Frozen Ladder	Grade 5	two otters climb an icy bank, fiction	231	● ▲ ■ three copies (PDF)
Ultramarine, the Blue Paint Brought Across the Sea	Grade 5	ultramarine blue paint, nonfiction	210	● ▲ ■ three copies (PDF)
Walkie-Talkies Along the Fence	Grade 5	making friends with a new neighbor, fiction	215	● ▲ ■ three copies (PDF)
Weaver Ants Stitch Leaves With Living Thread	Grade 5	weaver ants and leaf nests, nonfiction	213	● ▲ ■ three copies (PDF)
What Sixty Miles an Hour Really Means	Grade 5	speed, distance and time, nonfiction	199	● ▲ ■ three copies (PDF)
What Tree Rings Tell Us	Grade 5	tree rings, nonfiction	227	● ▲ ■ three copies (PDF)
When a River Cuts Off Its Own Loop	Grade 5	oxbow lakes, nonfiction	220	● ▲ ■ three copies (PDF)
When Your Body Mistakes Pollen for a Threat	Grade 5	allergies, nonfiction	225	● ▲ ■ three copies (PDF)
Where Food Goes	Grade 5	the human body, nonfiction	179	● ▲ ■ three copies (PDF)
Who Decides the Number on the Speed Limit Sign?	Grade 5	how speed limits are set, nonfiction	219	● ▲ ■ three copies (PDF)
Why a Bruise Changes Colors Like Paint	Grade 5	bruises and healing, nonfiction	218	● ▲ ■ three copies (PDF)
Why a Hillside Theater Carried a Whisper	Grade 5	ancient greek theaters, nonfiction	200	● ▲ ■ three copies (PDF)
Why a Red Cape Turns Dark Under Blue Light	Grade 5	colored stage lighting, nonfiction	223	● ▲ ■ three copies (PDF)
Why a Sealed Jar Keeps Peaches Fresh	Grade 5	canning food, nonfiction	242	● ▲ ■ three copies (PDF)
Why a Ship's Anchor Digs In and Holds	Grade 5	how an anchor holds a boat, nonfiction	226	● ▲ ■ three copies (PDF)
Why a Skater Spins Faster With Arms Pulled In	Grade 5	spinning and body shape, nonfiction	221	● ▲ ■ three copies (PDF)
Why a Spinning Top Refuses to Tip Over	Grade 5	how spinning keeps things upright, nonfiction	213	● ▲ ■ three copies (PDF)
Why Bridges Have Gaps in the Road	Grade 5	heat makes solids grow, nonfiction	218	● ▲ ■ three copies (PDF)
Why City Kids See So Few Stars	Grade 5	light pollution and stars, nonfiction	226	● ▲ ■ three copies (PDF)
Why Desert Nights Turn Cold	Grade 5	desert temperature swings, nonfiction	231	● ▲ ■ three copies (PDF)
Why Flowers Wear Bright Colors	Grade 5	flowers and pollination, nonfiction	211	● ▲ ■ three copies (PDF)
Why Fog Pools in Valleys at Dawn	Grade 5	valley fog, nonfiction	199	● ▲ ■ three copies (PDF)
Why Most of an Iceberg Hides Below the Waves	Grade 5	floating ice, nonfiction	191	● ▲ ■ three copies (PDF)
Why Noodles Take Longer to Cook on a Mountain	Grade 5	boiling water at high places, nonfiction	217	● ▲ ■ three copies (PDF)
Why Orion Rules Only the Winter Sky	Grade 5	seasons and constellations, nonfiction	223	● ▲ ■ three copies (PDF)
Why Pentagons Cannot Tile a Bathroom Floor	Grade 5	tiling with shapes, nonfiction	210	● ▲ ■ three copies (PDF)
Why the Fennec Fox Has Giant Ears	Grade 5	fennec foxes of the desert, nonfiction	225	● ▲ ■ three copies (PDF)
Why the Front of a Car Is Built to Crumple	Grade 5	forces and stopping time, nonfiction	223	● ▲ ■ three copies (PDF)
Why the Oboe Gives the Orchestra Its Note	Grade 5	tuning an orchestra, nonfiction	200	● ▲ ■ three copies (PDF)
Why We Have Leap Years	Grade 5	calendars and leap years, nonfiction	209	● ▲ ■ three copies (PDF)
Why Your Stomach Does Not Digest Itself	Grade 5	the stomach and acid, nonfiction	211	● ▲ ■ three copies (PDF)
Worms in the Compost Pile	Grade 5	compost and earthworms, nonfiction	227	● ▲ ■ three copies (PDF)
Wynn's Crooked Calligraphy Pen	Grade 5	practicing fancy lettering, fiction	243	● ▲ ■ three copies (PDF)
Yap's Giant Stone Money	Grade 5	stone money of yap, nonfiction	182	● ▲ ■ three copies (PDF)
Your Thumb Can Measure the Stars	Grade 5	parallax and star distance, nonfiction	202	● ▲ ■ three copies (PDF)
Zeb Tuttle and the Thirty-Mile Sneeze	Grade 5	a tall tale about a sneeze, fiction	253	● ▲ ■ three copies (PDF)
A Butterscotch Sky Over Mars	Grade 6	sky colors on mars, nonfiction	239	● ▲ ■ three copies (PDF)
A Clock That Could Ride the Waves	Grade 6	finding longitude at sea, nonfiction	230	● ▲ ■ three copies (PDF)
A Cow Eats Her Grass Twice	Grade 6	how a cow digests grass, nonfiction	199	● ▲ ■ three copies (PDF)
A Feather and a Hammer Fall Together on the Moon	Grade 6	air resistance and gravity, nonfiction	226	● ▲ ■ three copies (PDF)
A Gold Record Sent Toward the Stars	Grade 6	the voyager gold records, nonfiction	220	● ▲ ■ three copies (PDF)
A Lake Hidden on the Sea Floor	Grade 6	brine pools on the sea floor, nonfiction	235	● ▲ ■ three copies (PDF)
A Map Drawn on a Pizza Box Lid	Grade 6	moving away from a best friend, fiction	236	● ▲ ■ three copies (PDF)
A Meeting That Cannot Start: The Quorum Rule	Grade 6	the quorum rule, nonfiction	219	● ▲ ■ three copies (PDF)
A Sailmaker Turns Flat Cloth Into a Curve	Grade 6	sailmaker, nonfiction	232	● ▲ ■ three copies (PDF)
A Soil Scientist Reads the Layers Underground	Grade 6	soil scientist at a farm, nonfiction	230	● ▲ ■ three copies (PDF)
A Vault of Seeds for a Rainy Day	Grade 6	seed banks, nonfiction	223	● ▲ ■ three copies (PDF)
Asking the City to Close Your Street for a Party	Grade 6	block party permits, nonfiction	227	● ▲ ■ three copies (PDF)
Aspen Groves: Many Trunks, One Root System	Grade 6	quaking aspen groves, nonfiction	213	● ▲ ■ three copies (PDF)
Backwards Tuesday in Room 12	Grade 6	a school day done in reverse, fiction	233	● ▲ ■ three copies (PDF)
Batik: Drawing with Wax Before the Dye	Grade 6	batik wax resist cloth, nonfiction	246	● ▲ ■ three copies (PDF)
Beatboxing: A Drum Kit Made from a Mouth	Grade 6	beatboxing with the mouth, nonfiction	220	● ▲ ■ three copies (PDF)
Bouncing Lasers Off Mirrors on the Moon	Grade 6	measuring the distance to the moon, nonfiction	224	● ▲ ■ three copies (PDF)
Bring Your Dairy to Class	Grade 6	a spelling mix-up on a note, fiction	259	● ▲ ■ three copies (PDF)
Cabbage That Sours Itself in a Crock	Grade 6	making sauerkraut, nonfiction	207	● ▲ ■ three copies (PDF)
Cahokia: A City of Earth Beside the River	Grade 6	cahokia mound city, nonfiction	203	● ▲ ■ three copies (PDF)
Catching Drinking Water With Fog Nets	Grade 6	collecting water from fog, nonfiction	240	● ▲ ■ three copies (PDF)
Chiaroscuro: Painting with a Spotlight	Grade 6	light and dark in painting, nonfiction	225	● ▲ ■ three copies (PDF)
Cinder, the Dragon in the Glassblower's Furnace	Grade 6	a dragon that keeps a furnace hot, fiction	243	● ▲ ■ three copies (PDF)
Climbing Over Panama in a Ship	Grade 6	panama canal locks, nonfiction	216	● ▲ ■ three copies (PDF)
Cochineal: A Red Dye from Tiny Dried Insects	Grade 6	cochineal red dye, nonfiction	222	● ▲ ■ three copies (PDF)
Colored Flags in the Grass Before Anyone Digs	Grade 6	calling before you dig, nonfiction	226	● ▲ ■ three copies (PDF)
Commedia: Masks and Make-Believe in the Square	Grade 6	commedia dell'arte theater, nonfiction	208	● ▲ ■ three copies (PDF)
Cork: Bark That Grows Back	Grade 6	cork oak bark, nonfiction	224	● ▲ ■ three copies (PDF)
Cost Per Wear: The Cheap Coat Trap	Grade 6	cost per use when spending, nonfiction	213	● ▲ ■ three copies (PDF)
Counting the Spirals on a Sunflower	Grade 6	fibonacci number pattern, nonfiction	204	● ▲ ■ three copies (PDF)
Cousin Rafi and the Jar on the Porch	Grade 6	a visiting cousin and a rainy week, fiction	243	● ▲ ■ three copies (PDF)
Cyanotype: Pictures Printed by the Sun	Grade 6	cyanotype sun prints, nonfiction	225	● ▲ ■ three copies (PDF)
Delivery Day in a City With No Roads	Grade 6	everyday life in Venice, nonfiction	215	● ▲ ■ three copies (PDF)
Ezra's Hiccup Moved the Barn	Grade 6	a tall tale about a mighty hiccup, fiction	239	● ▲ ■ three copies (PDF)
Finding Neptune With Pencil and Paper	Grade 6	the discovery of neptune, nonfiction	241	● ▲ ■ three copies (PDF)
Fire Trucks That Cross the Town Line	Grade 6	fire departments helping each other, nonfiction	228	● ▲ ■ three copies (PDF)
Five Heads in a Row and the Next Flip	Grade 6	chance and independent coin flips, nonfiction	240	● ▲ ■ three copies (PDF)
Fog Nets in the Atacama Desert	Grade 6	catching water from fog, nonfiction	217	● ▲ ■ three copies (PDF)
From River to Tap: Cleaning Water Step by Step	Grade 6	how drinking water is cleaned, nonfiction	226	● ▲ ■ three copies (PDF)
Glass Beads in the Paint on the Road	Grade 6	road line painting crew, nonfiction	232	● ▲ ■ three copies (PDF)
Grandma's Soup Card	Grade 6	a family recipe, fiction	259	● ▲ ■ three copies (PDF)
Grandpa Wendell and the Rebellious Phone	Grade 6	funny autocorrect text messages, fiction	240	● ▲ ■ three copies (PDF)
Great Zimbabwe and Its Walls of Stone	Grade 6	great zimbabwe city, nonfiction	215	● ▲ ■ three copies (PDF)
Hester Pruitt's Cloud Farm	Grade 6	a tall tale about growing clouds, fiction	249	● ▲ ■ three copies (PDF)
Hitchhiking Burrs and the Idea Behind Velcro	Grade 6	burrs and seed spreading, nonfiction	224	● ▲ ■ three copies (PDF)
Honey Keeps for Years Because It Is Thirsty	Grade 6	why honey does not spoil, nonfiction	214	● ▲ ■ three copies (PDF)
How a Black Skillet Gets Its Slick Coat	Grade 6	cast iron seasoning, nonfiction	225	● ▲ ■ three copies (PDF)
How a Broken Bone Builds Itself Back	Grade 6	how bones heal, nonfiction	255	● ▲ ■ three copies (PDF)
How a Desert Spring Makes an Oasis	Grade 6	desert springs and oases, nonfiction	224	● ▲ ■ three copies (PDF)
How a Thermos Keeps Drinks Hot	Grade 6	heat transfer, nonfiction	219	● ▲ ■ three copies (PDF)
How a Waterfall Slowly Walks Upstream	Grade 6	waterfalls moving upstream, nonfiction	230	● ▲ ■ three copies (PDF)
How Glaciers Shape the Land	Grade 6	glaciers, nonfiction	233	● ▲ ■ three copies (PDF)
How Glow-in-the-Dark Stars Save Up Light	Grade 6	stored light energy, nonfiction	236	● ▲ ■ three copies (PDF)
How Headphones Cancel the Hum of a Plane	Grade 6	sound waves and noise, nonfiction	225	● ▲ ■ three copies (PDF)
How Landlocked Countries Reach the Sea	Grade 6	countries with no coastline, nonfiction	209	● ▲ ■ three copies (PDF)
How to Read the Squiggly Lines on a Hill Map	Grade 6	reading contour lines, nonfiction	227	● ▲ ■ three copies (PDF)
How Vaccines Work	Grade 6	health and the body, nonfiction	243	● ▲ ■ three copies (PDF)
Iceland: Homes Warmed From Below the Ground	Grade 6	geothermal heat in Iceland, nonfiction	226	● ▲ ■ three copies (PDF)
Indigo: The Leaf That Turns Blue in Air	Grade 6	indigo and plant dye, nonfiction	233	● ▲ ■ three copies (PDF)
Injera: The Edible Plate of Ethiopia	Grade 6	a flatbread from Ethiopia, nonfiction	221	● ▲ ■ three copies (PDF)
Lichen: A Rock Crust Made by Two Partners	Grade 6	lichens on rocks, nonfiction	222	● ▲ ■ three copies (PDF)
Mabel's Eleven-Mile Sandwich	Grade 6	a tall tale about a giant sandwich, fiction	245	● ▲ ■ three copies (PDF)
Measuring a Flagpole by Its Shadow	Grade 6	proportions and shadows, nonfiction	208	● ▲ ■ three copies (PDF)
Mr. Quill Teaches in Rhyme	Grade 6	a substitute who only speaks in rhyme, fiction	281	● ▲ ■ three copies (PDF)
One River, Six Towns, One Shared Plan	Grade 6	towns sharing a watershed, nonfiction	211	● ▲ ■ three copies (PDF)
Ordo the Hall Monitor and the Rule About Running	Grade 6	a rule-following robot learns exceptions, fiction	241	● ▲ ■ three copies (PDF)
Peat Bogs: Wet Ground That Saves Old Plants	Grade 6	peat bogs and sphagnum moss, nonfiction	241	● ▲ ■ three copies (PDF)
Qanats: Rivers That Flow Underground	Grade 6	persian underground channels, nonfiction	230	● ▲ ■ three copies (PDF)
Reading a Ballot Question Word by Word	Grade 6	reading ballot questions, nonfiction	241	● ▲ ■ three copies (PDF)
Reading a Map Scale	Grade 6	map scales, nonfiction	241	● ▲ ■ three copies (PDF)
Rebuilding a Cracked Stained Glass Window	Grade 6	stained glass restorer, nonfiction	213	● ▲ ■ three copies (PDF)
Roman Roads	Grade 6	ancient history, nonfiction	242	● ▲ ■ three copies (PDF)
Root a Pothos Cutting in a Jar	Grade 6	growing a plant from a cutting, nonfiction	223	● ▲ ■ three copies (PDF)
Rusk the Scarecrow Who Frightened Nothing	Grade 6	a robot scarecrow in a cornfield, fiction	234	● ▲ ■ three copies (PDF)
Same Note, Different Voice: What Timbre Is	Grade 6	timbre and overtones, nonfiction	217	● ▲ ■ three copies (PDF)
Saving Money and Interest	Grade 6	saving and interest, nonfiction	197	● ▲ ■ three copies (PDF)
Saving the Seat on Bus 14	Grade 6	a best friend away for a month, fiction	252	● ▲ ■ three copies (PDF)
Scooping a Handful of Dust From Bennu	Grade 6	collecting an asteroid sample, nonfiction	240	● ▲ ■ three copies (PDF)
Sea Green Paint and the Ratio That Stays Put	Grade 6	equivalent ratios in paint, nonfiction	224	● ▲ ■ three copies (PDF)
Serving Size Math on the Cereal Box	Grade 6	reading nutrition label serving size, nonfiction	218	● ▲ ■ three copies (PDF)
Singapore: A Whole Country on One Small Island	Grade 6	a tiny island country, nonfiction	212	● ▲ ■ three copies (PDF)
Soy Milk Sets Into Tofu	Grade 6	how tofu is made, nonfiction	225	● ▲ ■ three copies (PDF)
The Badger's Borrowed Lantern	Grade 6	a badger who keeps a promise, fiction	245	● ▲ ■ three copies (PDF)
The Bar Graph That Cut Off the Bottom	Grade 6	misleading graph scales, nonfiction	215	● ▲ ■ three copies (PDF)
The Blue Tape Line Down the Middle	Grade 6	sharing a room with a stepbrother, fiction	244	● ▲ ■ three copies (PDF)
The Bottle Post from Next Tuesday	Grade 6	a message arriving from the future, fiction	250	● ▲ ■ three copies (PDF)
The Casserole Dish That Never Came Home	Grade 6	neighbors passing a dish around, fiction	270	● ▲ ■ three copies (PDF)
The Chess Clock Truce	Grade 6	siblings sharing one tablet, fiction	261	● ▲ ■ three copies (PDF)
The Chilly Layer Beneath the Warm Sea	Grade 6	temperature layers in the ocean, nonfiction	238	● ▲ ■ three copies (PDF)
The Cold Spots Inside a Microwave Oven	Grade 6	microwaves and heating, nonfiction	235	● ▲ ■ three copies (PDF)
The Domesday Book: Counting All of England	Grade 6	domesday book survey, nonfiction	213	● ▲ ■ three copies (PDF)
The Dragon Who Paid Off Overdue Library Books	Grade 6	a dragon with a library fine, fiction	229	● ▲ ■ three copies (PDF)
The Ferret Who Counted Every Tunnel	Grade 6	a ferret and a busy burrow, fiction	242	● ▲ ■ three copies (PDF)
The Fox and the Canyon Echo	Grade 6	a fox who tricks with an echo, fiction	236	● ▲ ■ three copies (PDF)
The Gamelan: An Orchestra Tuned as One Set	Grade 6	gamelan orchestra, nonfiction	216	● ▲ ■ three copies (PDF)
The Gap in the Tomato Fence	Grade 6	two neighbors and a shared garden fence, fiction	251	● ▲ ■ three copies (PDF)
The Goat That Ate the Mayor's Speech	Grade 6	a goat and a lost speech, fiction	263	● ▲ ■ three copies (PDF)
The Goo That Hardens When You Punch It	Grade 6	liquids that act like solids, nonfiction	232	● ▲ ■ three copies (PDF)
The Great Stink and London's Sewers	Grade 6	london sewers, nonfiction	241	● ▲ ■ three copies (PDF)
The Gull Who Copied the Foghorn	Grade 6	a gull and a foghorn, fiction	234	● ▲ ■ three copies (PDF)
The Hedgehog Who Sold Umbrellas	Grade 6	a hedgehog's umbrella shop, fiction	235	● ▲ ■ three copies (PDF)
The Heron Who Never Asked	Grade 6	a heron too shy to ask, fiction	242	● ▲ ■ three copies (PDF)
The Hurdy-Gurdy: A Violin Played with a Crank	Grade 6	hurdy-gurdy instrument, nonfiction	214	● ▲ ■ three copies (PDF)
The Lake in Cambodia That Swells and Shrinks	Grade 6	a lake that changes with seasons, nonfiction	222	● ▲ ■ three copies (PDF)
The Law That Expires Unless Renewed	Grade 6	laws with end dates, nonfiction	230	● ▲ ■ three copies (PDF)
The Layers of the Earth	Grade 6	earth science, nonfiction	224	● ▲ ■ three copies (PDF)
The Little Tube Behind Your Ear Pops	Grade 6	why ears pop, nonfiction	273	● ▲ ■ three copies (PDF)
The Loudest Whisper in Dunmore	Grade 6	a tall tale about a booming whisper, fiction	226	● ▲ ■ three copies (PDF)
The Milky Sap Behind Rubber Bands	Grade 6	natural rubber from trees, nonfiction	213	● ▲ ■ three copies (PDF)
The Mirror Maker Who Waits for Glass to Cool	Grade 6	telescope mirror maker, nonfiction	237	● ▲ ■ three copies (PDF)
The Moss Observatory and the Watering Comet	Grade 6	tiny astronomers in a flowerpot, fiction	239	● ▲ ■ three copies (PDF)
The Mule at the Flooded Ford	Grade 6	a mule who will not cross, fiction	220	● ▲ ■ three copies (PDF)
The Night the Power Went Out	Grade 6	family and community, fiction	282	● ▲ ■ three copies (PDF)
The Nile, a River in the Desert	Grade 6	geography and history, nonfiction	269	● ▲ ■ three copies (PDF)
The Pantheon's Dome of Roman Concrete	Grade 6	roman concrete and the pantheon, nonfiction	217	● ▲ ■ three copies (PDF)
The Pinhole Camera	Grade 6	light and cameras, nonfiction	237	● ▲ ■ three copies (PDF)
The Pretzel Cart Break-Even Day	Grade 6	break-even and profit, nonfiction	202	● ▲ ■ three copies (PDF)
The Pudding Mix-Up on Elm Street	Grade 6	swapped dishes at a block party, fiction	244	● ▲ ■ three copies (PDF)
The Red Glow Inside Your Eyes in Flash Photos	Grade 6	red eye in photographs, nonfiction	269	● ▲ ■ three copies (PDF)
The Salmon Counter at the Viewing Window	Grade 6	fish counter at a dam, nonfiction	221	● ▲ ■ three copies (PDF)
The Scarf Map That Unraveled Toward Home	Grade 6	a knitted scarf that guides you, fiction	234	● ▲ ■ three copies (PDF)
The Sensitive Plant That Folds Its Leaves	Grade 6	plants that move when touched, nonfiction	228	● ▲ ■ three copies (PDF)
The Serving Size Trap on the Snack Bag	Grade 6	reading food labels, nonfiction	263	● ▲ ■ three copies (PDF)
The Small Moon That Sprays Ice Into Space	Grade 6	icy jets on saturn's moon enceladus, nonfiction	244	● ▲ ■ three copies (PDF)
The Snapped String	Grade 6	a recital problem, fiction	277	● ▲ ■ three copies (PDF)
The Snow Route Planner Ranks the Roads	Grade 6	snow plow route planner, nonfiction	231	● ▲ ■ three copies (PDF)
The Substitute Goalie	Grade 6	a soccer game, fiction	287	● ▲ ■ three copies (PDF)
The Subtitler Who Fits Words Into Seconds	Grade 6	subtitle writer, nonfiction	230	● ▲ ■ three copies (PDF)
The Sugar That Grows Underground	Grade 6	where sugar comes from, nonfiction	222	● ▲ ■ three copies (PDF)
The Tide Clock of Sandpiper Wharf	Grade 6	a clock that runs on the sea, fiction	261	● ▲ ■ three copies (PDF)
The Tortoise Who Kept the Market Clock	Grade 6	a slow tortoise with a big job, fiction	228	● ▲ ■ three copies (PDF)
The Treaty Signed on a Thimble	Grade 6	tiny neighbors under the floor, fiction	233	● ▲ ■ three copies (PDF)
The Village That Lost Its Wednesdays	Grade 6	a day of the week that goes missing, fiction	229	● ▲ ■ three copies (PDF)
The Water That Is Neither Fresh Nor Salty	Grade 6	estuaries and brackish water, nonfiction	242	● ▲ ■ three copies (PDF)
The Weaverbird's Crooked Nest	Grade 6	a bird's imperfect nest, fiction	232	● ▲ ■ three copies (PDF)
The Word Theo Said at the Window	Grade 6	a baby brother's first word, fiction	254	● ▲ ■ three copies (PDF)
Three Ideas for One Tide Pool Poster	Grade 6	a group project that stalls, fiction	239	● ▲ ■ three copies (PDF)
Three Parts Inside a Grain of Wheat	Grade 6	whole wheat and white flour, nonfiction	222	● ▲ ■ three copies (PDF)
Three Ways to Count a Club Election	Grade 6	ways of counting votes, nonfiction	217	● ▲ ■ three copies (PDF)
Timbuktu and Its Handwritten Libraries	Grade 6	timbuktu manuscripts, nonfiction	196	● ▲ ■ three copies (PDF)
Tomato Flowers Wait for a Buzz	Grade 6	buzz pollination of tomatoes, nonfiction	217	● ▲ ■ three copies (PDF)
Two Discounts Do Not Make Thirty	Grade 6	stacking percent discounts, nonfiction	213	● ▲ ■ three copies (PDF)
Two Moths and the Porch Lamp	Grade 6	moths and a bright lamp, fiction	224	● ▲ ■ three copies (PDF)
Two Shadows Helped Measure the Whole Earth	Grade 6	measuring earth with shadows, nonfiction	237	● ▲ ■ three copies (PDF)
Two Ways to Build a Mosaic Floor	Grade 6	mosaic artist methods, nonfiction	229	● ▲ ■ three copies (PDF)
Unit Prices and Better Buys	Grade 6	shopping math, nonfiction	217	● ▲ ■ three copies (PDF)
Venus Changed Shape Through Galileo's Telescope	Grade 6	the phases of venus, nonfiction	246	● ▲ ■ three copies (PDF)
Voice Memos From the Bakery Shift	Grade 6	a parent who works at night, fiction	254	● ▲ ■ three copies (PDF)
What Happens When You Sleep	Grade 6	sleep and the brain, nonfiction	229	● ▲ ■ three copies (PDF)
What Really Tells Your Lungs to Speed Up	Grade 6	how breathing is controlled, nonfiction	263	● ▲ ■ three copies (PDF)
Why a Board Replaces Only Some Members at a Time	Grade 6	staggered terms, nonfiction	233	● ▲ ■ three copies (PDF)
Why a Humming Fork Gets Louder on a Table	Grade 6	vibration and loudness, nonfiction	226	● ▲ ■ three copies (PDF)
Why an Auctioneer Talks in a Chant	Grade 6	auctioneer, nonfiction	220	● ▲ ■ three copies (PDF)
Why Astronauts Must Work Out Every Day	Grade 6	exercise in orbit, nonfiction	240	● ▲ ■ three copies (PDF)
Why Bridge Builders Trust Triangles	Grade 6	triangles and strong shapes, nonfiction	215	● ▲ ■ three copies (PDF)
Why Frozen Seawater Is Not Very Salty	Grade 6	salt in sea ice, nonfiction	227	● ▲ ■ three copies (PDF)
Why Greenland Looks So Huge on Flat Maps	Grade 6	map distortion, nonfiction	214	● ▲ ■ three copies (PDF)
Why Guitar Frets Crowd Together Near the Body	Grade 6	guitar fret spacing, nonfiction	224	● ▲ ■ three copies (PDF)
Why Ice Floats	Grade 6	water and ice, nonfiction	215	● ▲ ■ three copies (PDF)
Why Lakes Flip Over Twice a Year	Grade 6	seasonal mixing in lakes, nonfiction	205	● ▲ ■ three copies (PDF)
Why One Bad Bulb Darkens a String of Lights	Grade 6	series circuits, nonfiction	224	● ▲ ■ three copies (PDF)
Why Salad Dressing Separates in the Bottle	Grade 6	mixtures of oil and water, nonfiction	231	● ▲ ■ three copies (PDF)
Why Some Mountain Lakes Glow Turquoise	Grade 6	glacier lakes and their color, nonfiction	224	● ▲ ■ three copies (PDF)
Why the Alarm Feels Worse in the Middle of a Dream	Grade 6	sleep stages and grogginess, nonfiction	253	● ▲ ■ three copies (PDF)
Why the Bicycle Pump Gets Warm as You Pump	Grade 6	gases and heat, nonfiction	215	● ▲ ■ three copies (PDF)
Why the Clock Jumps on a Flight East	Grade 6	time zones and elapsed time, nonfiction	219	● ▲ ■ three copies (PDF)
Why the Date Line Zigzags Across the Pacific	Grade 6	the International Date Line, nonfiction	228	● ▲ ■ three copies (PDF)
Why Two Signatures Guard the Club Treasury	Grade 6	checks and balances with money, nonfiction	227	● ▲ ■ three copies (PDF)
Why Wet Sand Builds Castles and Dry Sand Slumps	Grade 6	sand and water, nonfiction	224	● ▲ ■ three copies (PDF)
Why Your Doctor Says No to Antibiotics for a Cold	Grade 6	germs and medicine, nonfiction	257	● ▲ ■ three copies (PDF)
Why Your Nose Stops Noticing the Smell	Grade 6	smell and getting used to it, nonfiction	254	● ▲ ■ three copies (PDF)
Why Your Recorded Voice Sounds Like a Stranger	Grade 6	hearing your own voice, nonfiction	217	● ▲ ■ three copies (PDF)
Winter Comes When Earth Is Closest to the Sun	Grade 6	why we have seasons, nonfiction	247	● ▲ ■ three copies (PDF)
Winter Rye Covers the Bare Field	Grade 6	cover crops on a farm, nonfiction	223	● ▲ ■ three copies (PDF)
Wires Across the Continent in 1861	Grade 6	the transcontinental telegraph, nonfiction	207	● ▲ ■ three copies (PDF)
Your Sixth Sense Is Hiding in Your Muscles	Grade 6	body position sense, nonfiction	261	● ▲ ■ three copies (PDF)
A Motion on the Floor	Grade 7	rules of order in meetings, nonfiction	266	● ▲ ■ three copies (PDF)
Blustery Hollow Votes Tuesday Off the Calendar	Grade 7	a town cancels a weekday, fiction	274	● ▲ ■ three copies (PDF)
Captain Pennywhistle's Very Short Ocean Voyage	Grade 7	a tall tale sailing a pond, fiction	268	● ▲ ■ three copies (PDF)
Cells, the Building Blocks of Life	Grade 7	life science, nonfiction	273	● ▲ ■ three copies (PDF)
Curds and Whey: How Milk Becomes Cheese	Grade 7	cheesemaking, nonfiction	249	● ▲ ■ three copies (PDF)
Finding Islands Without a Compass: Wayfinding	Grade 7	polynesian ocean navigation, nonfiction	242	● ▲ ■ three copies (PDF)
Foley Artists and the Sound of Footsteps	Grade 7	film sound effects, nonfiction	271	● ▲ ■ three copies (PDF)
From Twenty-Two Signs to the Alphabet: Phoenicians	Grade 7	the phoenician alphabet, nonfiction	242	● ▲ ■ three copies (PDF)
Gus Harrow's Turnip and the Closed Road	Grade 7	a tall tale about a giant turnip, fiction	279	● ▲ ■ three copies (PDF)
Harvesting Winter Ice Before Refrigerators	Grade 7	ice harvesting and iceboxes, nonfiction	239	● ▲ ■ three copies (PDF)
How a Microwave Oven Heats Food	Grade 7	microwave ovens, nonfiction	275	● ▲ ■ three copies (PDF)
How Cacti Survive in the Desert	Grade 7	desert plants, nonfiction	269	● ▲ ■ three copies (PDF)
How Earthquakes Are Measured	Grade 7	earthquakes, nonfiction	271	● ▲ ■ three copies (PDF)
How Hermit Crabs Trade Shells in a Line	Grade 7	hermit crab shell swaps, nonfiction	246	● ▲ ■ three copies (PDF)
How Paper Traveled West from China	Grade 7	the spread of papermaking, nonfiction	239	● ▲ ■ three copies (PDF)
How Salt Keeps Food From Spoiling	Grade 7	salt and food preservation, nonfiction	222	● ▲ ■ three copies (PDF)
How the Erie Canal Changed Life in New York	Grade 7	erie canal and daily life, nonfiction	234	● ▲ ■ three copies (PDF)
Inertia and Seat Belts	Grade 7	motion and forces, nonfiction	315	● ▲ ■ three copies (PDF)
Inside the Hive: Nectar Becomes Honey	Grade 7	how bees make honey, nonfiction	224	● ▲ ■ three copies (PDF)
Measuring a Flagpole with a Pocket Mirror	Grade 7	similar triangles, nonfiction	271	● ▲ ■ three copies (PDF)
Mending a Cracked Bowl with Powdered Gold	Grade 7	japanese pottery repair, nonfiction	269	● ▲ ■ three copies (PDF)
Mountain Staircases: Farming on Terraces	Grade 7	terrace farming, nonfiction	241	● ▲ ■ three copies (PDF)
Mr. Pell, the Substitute Who Only Rhymed	Grade 7	a substitute teacher who rhymes, fiction	311	● ▲ ■ three copies (PDF)
Odalys Takes Every Word Literally for a Day	Grade 7	idioms taken literally, fiction	313	● ▲ ■ three copies (PDF)
Odd on the Left, Even on the Right	Grade 7	street names and house numbers, nonfiction	268	● ▲ ■ three copies (PDF)
Pancakes for the Volunteer Firehouse	Grade 7	volunteer fire departments, nonfiction	276	● ▲ ■ three copies (PDF)
Peas, Beans, and the Nitrogen Trade	Grade 7	legumes and crop rotation, nonfiction	246	● ▲ ■ three copies (PDF)
Pebbles in the Library Book Drop	Grade 7	numbered stones in a book drop, fiction	261	● ▲ ■ three copies (PDF)
Pop Science: Inside a Popcorn Kernel	Grade 7	why popcorn pops, nonfiction	234	● ▲ ■ three copies (PDF)
Quipu: The Inca Records Tied in Knots	Grade 7	inca knotted cord records, nonfiction	257	● ▲ ■ three copies (PDF)
Raking Leaves: By the Hour or by the Job	Grade 7	comparing pay rates, nonfiction	228	● ▲ ■ three copies (PDF)
Reading a Bus Timetable After Midnight	Grade 7	24-hour time and elapsed time, nonfiction	231	● ▲ ■ three copies (PDF)
Reading a Floor Plan to Price Carpet	Grade 7	scale drawings and area, nonfiction	236	● ▲ ■ three copies (PDF)
Sailors, Scurvy, and the Missing Vitamin	Grade 7	vitamin c and scurvy, nonfiction	230	● ▲ ■ three copies (PDF)
Sauerkraut: Cabbage, Salt, and Bacteria	Grade 7	fermented cabbage, nonfiction	238	● ▲ ■ three copies (PDF)
Seven Keys Found on the Ferry Ramp	Grade 7	a ring of unlabeled keys, fiction	272	● ▲ ■ three copies (PDF)
The Archerfish That Shoots Down Its Dinner	Grade 7	archerfish hunting, nonfiction	233	● ▲ ■ three copies (PDF)
The Bakery Receipts With Circled Letters	Grade 7	a hidden message on receipts, fiction	248	● ▲ ■ three copies (PDF)
The Bakery Where the Average Misleads	Grade 7	mean and median, nonfiction	226	● ▲ ■ three copies (PDF)
The Beep From the Old Water Tower	Grade 7	tracing a radio signal, fiction	254	● ▲ ■ three copies (PDF)
The Blue That Once Cost More Than Gold	Grade 7	ultramarine pigment history, nonfiction	263	● ▲ ■ three copies (PDF)
The Bowerbird's Stage Made of Sticks and Berries	Grade 7	bowerbirds and courtship, nonfiction	234	● ▲ ■ three copies (PDF)
The Census Taker at the Door	Grade 7	the census and fair representation, nonfiction	264	● ▲ ■ three copies (PDF)
The Clever Octopus	Grade 7	animals, nonfiction	275	● ▲ ■ three copies (PDF)
The Clock That Solved the Longitude Puzzle	Grade 7	marine clocks and longitude, nonfiction	243	● ▲ ■ three copies (PDF)
The Cuckoo That Hands Off Its Parenting	Grade 7	cuckoos and borrowed nests, nonfiction	238	● ▲ ■ three copies (PDF)
The Deli Where Every Order Had to Be a Pun	Grade 7	a sandwich shop with a pun rule, fiction	257	● ▲ ■ three copies (PDF)
The Dome Roman Builders Poured in Concrete	Grade 7	roman concrete and the pantheon, nonfiction	241	● ▲ ■ three copies (PDF)
The Echo That Talked Back at Gull Point	Grade 7	a lighthouse echo mystery, fiction	272	● ▲ ■ three copies (PDF)
The Extra Nine-Tenths of a Cent at the Pump	Grade 7	rounding gas prices, nonfiction	241	● ▲ ■ three copies (PDF)
The Flour and Flower Bake Sale Disaster	Grade 7	homophone mix-up at a bake sale, fiction	286	● ▲ ■ three copies (PDF)
The Garden Plot Swap	Grade 7	friendship and gardens, fiction	290	● ▲ ■ three copies (PDF)
The Green Garden Growing in a Sloth's Fur	Grade 7	sloths and their fur, nonfiction	253	● ▲ ■ three copies (PDF)
The Instrument You Play Without Touching	Grade 7	the theremin, nonfiction	270	● ▲ ■ three copies (PDF)
The Kangaroo Rat Who Never Needs a Drink	Grade 7	desert water survival, nonfiction	235	● ▲ ■ three copies (PDF)
The Library Your Taxes Built	Grade 7	public libraries and local taxes, nonfiction	283	● ▲ ■ three copies (PDF)
The Map Written in Mirror Letters	Grade 7	a backward map in a sketchbook, fiction	266	● ▲ ■ three copies (PDF)
The Mudskipper Fish Out of Water	Grade 7	mudskippers on tidal flats, nonfiction	242	● ▲ ■ three copies (PDF)
The Mural	Grade 7	friendship and community, fiction	331	● ▲ ■ three copies (PDF)
The Nine-Inch Pan Problem	Grade 7	area of circles in baking, nonfiction	246	● ▲ ■ three copies (PDF)
The Pickle Jam Switcheroo at the County Fair	Grade 7	a mixed-up fair contest, fiction	302	● ▲ ■ three copies (PDF)
The Pigeon With a Code on Its Leg	Grade 7	a stray racing pigeon, fiction	286	● ▲ ■ three copies (PDF)
The Pika Who Makes Hay While the Sun Shines	Grade 7	pikas on mountain slopes, nonfiction	242	● ▲ ■ three copies (PDF)
The Robot That Rolled Sideways	Grade 7	robots and teamwork, fiction	289	● ▲ ■ three copies (PDF)
The Rule of 72 for Doubling Savings	Grade 7	how fast savings double, nonfiction	229	● ▲ ■ three copies (PDF)
The Shed Code Hidden in the Sundial	Grade 7	a shadow puzzle at a school garden, fiction	249	● ▲ ■ three copies (PDF)
The Shrimp and the Goby Who Share a Burrow	Grade 7	partners on the sea floor, nonfiction	228	● ▲ ■ three copies (PDF)
The Silk Road	Grade 7	world history and trade, nonfiction	253	● ▲ ■ three copies (PDF)
The Sleeping Exhibit at the Mattress Museum	Grade 7	a mix-up at a museum, fiction	287	● ▲ ■ three copies (PDF)
The Story of Zero	Grade 7	history of numbers, nonfiction	241	● ▲ ■ three copies (PDF)
The Substitute and the Silent Bell	Grade 7	school and kindness, fiction	290	● ▲ ■ three copies (PDF)
The Thin Piece of Cane Inside a Clarinet	Grade 7	how a clarinet reed works, nonfiction	261	● ▲ ■ three copies (PDF)
The Tuba Case That Would Not Stop Rattling	Grade 7	a rattle in an instrument case, fiction	252	● ▲ ■ three copies (PDF)
The Wood Frog That Freezes Solid Each Winter	Grade 7	wood frogs and winter, nonfiction	227	● ▲ ■ three copies (PDF)
The Wrong Suitcase Full of Spoons	Grade 7	a swapped suitcase at a train station, fiction	245	● ▲ ■ three copies (PDF)
Three Minutes at the Microphone	Grade 7	public comment at city council, nonfiction	268	● ▲ ■ three copies (PDF)
Town Meeting Night in a Small Town	Grade 7	town meetings and direct democracy, nonfiction	273	● ▲ ■ three copies (PDF)
Trail Marker Fourteen Has Vanished	Grade 7	a missing trail sign, fiction	267	● ▲ ■ three copies (PDF)
Twenty-Four Pictures to Make One Second Move	Grade 7	stop-motion animation, nonfiction	245	● ▲ ■ three copies (PDF)
Two Discounts Do Not Make Half Off	Grade 7	stacked percent discounts, nonfiction	223	● ▲ ■ three copies (PDF)
Warp and Weft: The Two Threads of Every Cloth	Grade 7	how a loom weaves cloth, nonfiction	278	● ▲ ■ three copies (PDF)
What Causes the Northern Lights	Grade 7	northern lights, nonfiction	263	● ▲ ■ three copies (PDF)
What Happens to Clay Inside the Kiln	Grade 7	firing pottery in a kiln, nonfiction	288	● ▲ ■ three copies (PDF)
What It Takes to Earn a Stoplight	Grade 7	traffic studies and local decisions, nonfiction	276	● ▲ ■ three copies (PDF)
When Every Town Kept Its Own Time	Grade 7	railroads and standard time, nonfiction	242	● ▲ ■ three copies (PDF)
When Neighbors Raised a Barn in a Day	Grade 7	barn raisings and mutual help, nonfiction	262	● ▲ ■ three copies (PDF)
Why a Concert Hall Is Built Like a Shoebox	Grade 7	concert hall acoustics, nonfiction	275	● ▲ ■ three copies (PDF)
Why a Linocut Print Comes Out Backward	Grade 7	linoleum block printing, nonfiction	279	● ▲ ■ three copies (PDF)
Why a Seared Steak Beats a Boiled One	Grade 7	browning and flavor, nonfiction	246	● ▲ ■ three copies (PDF)
Why Bread Dough Rises	Grade 7	yeast and baking, nonfiction	275	● ▲ ■ three copies (PDF)
Why Chopping an Onion Brings Tears	Grade 7	onion chemistry, nonfiction	238	● ▲ ■ three copies (PDF)
Why Quilters Cut Squares in Half	Grade 7	triangles and area in quilting, nonfiction	245	● ▲ ■ three copies (PDF)
Why Salt Melts Ice	Grade 7	freezing point, nonfiction	260	● ▲ ■ three copies (PDF)
Why the Hanseatic League Linked Northern Ports	Grade 7	medieval northern trading towns, nonfiction	238	● ▲ ■ three copies (PDF)
Why Your Ballot Is a Secret	Grade 7	the secret ballot, nonfiction	259	● ▲ ■ three copies (PDF)
A Court Where You Can Speak for Yourself	Grade 8	small claims court, nonfiction	261	● ▲ ■ three copies (PDF)
A Crushed Hood and Why That Is Good News	Grade 8	crumple zones in cars, nonfiction	279	● ▲ ■ three copies (PDF)
A Piano Tuner Listens for the Wobble	Grade 8	piano tuning, nonfiction	270	● ▲ ■ three copies (PDF)
A Sound Channel Deep Under the Sea	Grade 8	sound in the deep ocean, nonfiction	256	● ▲ ■ three copies (PDF)
Arrows Left of the Gold	Grade 8	learning archery, fiction	314	● ▲ ■ three copies (PDF)
Atoms and the Periodic Table	Grade 8	chemistry, nonfiction	288	● ▲ ■ three copies (PDF)
Aunt Winifred's Weather Knee	Grade 8	a tall tale about a forecasting knee, fiction	275	● ▲ ■ three copies (PDF)
Banking Bone Before Age Thirty	Grade 8	building strong bones in youth, nonfiction	265	● ▲ ■ three copies (PDF)
Blocking Three Escape Routes for Heat in a Flask	Grade 8	heat transfer in a vacuum flask, nonfiction	264	● ▲ ■ three copies (PDF)
Build a Compost Pile in Four Steps	Grade 8	how to make compost, nonfiction	308	● ▲ ■ three copies (PDF)
Burning Food to Count Its Calories	Grade 8	how food energy is measured, nonfiction	267	● ▲ ■ three copies (PDF)
Cold Water Rising Along a Windy Coast	Grade 8	coastal upwelling, nonfiction	258	● ▲ ■ three copies (PDF)
Crop Rotation Saves the Soil	Grade 8	farming and soil, nonfiction	294	● ▲ ■ three copies (PDF)
Dots, Dashes, and the Slow Fourth Week	Grade 8	learning Morse code, fiction	290	● ▲ ■ three copies (PDF)
Egg-Shaped Lobes That Time an Engine's Breathing	Grade 8	the engine camshaft, nonfiction	281	● ▲ ■ three copies (PDF)
Eleven Jars and One Quiet Lid	Grade 8	a pickling chore, fiction	297	● ▲ ■ three copies (PDF)
Flowers Built for Their Visitors	Grade 8	pollination and flower design, nonfiction	290	● ▲ ■ three copies (PDF)
Foreign Coins in the Footbridge Donation Jar	Grade 8	coins from many countries in a jar, fiction	262	● ▲ ■ three copies (PDF)
Forty Dollars for Spirit Week	Grade 8	a student council budget, fiction	273	● ▲ ■ three copies (PDF)
From Wild Grass to Corn on the Cob	Grade 8	how corn was bred from teosinte, nonfiction	269	● ▲ ■ three copies (PDF)
Grandma's Smudged Card	Grade 8	problem solving and family, fiction	291	● ▲ ■ three copies (PDF)
Grandpa Walt and the Stubborn Phone	Grade 8	a phone that changes words in texts, fiction	275	● ▲ ■ three copies (PDF)
Grout Lines in Grandpa's Bathroom	Grade 8	a tiling chore, fiction	302	● ▲ ■ three copies (PDF)
Gutenberg and the Printing Press	Grade 8	inventions and history, nonfiction	304	● ▲ ■ three copies (PDF)
How a Body Learns to Handle Summer Heat	Grade 8	adjusting to hot weather, nonfiction	257	● ▲ ■ three copies (PDF)
How a Copier Paints With Static Electricity	Grade 8	static electricity in copiers, nonfiction	254	● ▲ ■ three copies (PDF)
How a Refrigerator Moves Heat	Grade 8	heat and machines, nonfiction	258	● ▲ ■ three copies (PDF)
How a River Loop Becomes an Oxbow Lake	Grade 8	river meanders and oxbow lakes, nonfiction	278	● ▲ ■ three copies (PDF)
How a Screen Knows Where Your Finger Is	Grade 8	capacitive touchscreens, nonfiction	273	● ▲ ■ three copies (PDF)
How Bats Find Their Way	Grade 8	animals and sound, nonfiction	282	● ▲ ■ three copies (PDF)
How GPS Finds You	Grade 8	satellites and navigation, nonfiction	272	● ▲ ■ three copies (PDF)
How Natural Selection Works	Grade 8	evolution and life science, nonfiction	263	● ▲ ■ three copies (PDF)
How Polarized Sunglasses Tame a Shiny Lake	Grade 8	polarized light and glare, nonfiction	259	● ▲ ■ three copies (PDF)
How Soap Pulls Germs Apart	Grade 8	why soap cleans hands, nonfiction	262	● ▲ ■ three copies (PDF)
How to Ask a Government Office for Its Paperwork	Grade 8	public records requests, nonfiction	266	● ▲ ■ three copies (PDF)
How Water Climbs a Tall Tree	Grade 8	how trees move water, nonfiction	295	● ▲ ■ three copies (PDF)
Index Cards in the Wrong Order	Grade 8	a first debate round, fiction	287	● ▲ ■ three copies (PDF)
Inside the Hive with a Beekeeper	Grade 8	beekeeping, nonfiction	262	● ▲ ■ three copies (PDF)
Interpreting at the Speed of a Speaker	Grade 8	language interpreters, nonfiction	254	● ▲ ■ three copies (PDF)
Knowing Where Your Hand Is in the Dark	Grade 8	the body's position sense, nonfiction	270	● ▲ ■ three copies (PDF)
Live Captioners and the Chord Keyboard	Grade 8	real-time captioning, nonfiction	271	● ▲ ■ three copies (PDF)
Locker 31 and the Cello With No Owner	Grade 8	an unclaimed cello at a bus depot, fiction	256	● ▲ ■ three copies (PDF)
Lost Luggage, Found Llama	Grade 8	an airport baggage mix-up, fiction	269	● ▲ ■ three copies (PDF)
Mail Shot Through Tubes Under the City Streets	Grade 8	pneumatic tube systems, nonfiction	282	● ▲ ■ three copies (PDF)
Mangroves: Trees in Salt Water	Grade 8	mangrove forests, nonfiction	286	● ▲ ■ three copies (PDF)
Mapping the Harbor Floor With Sound	Grade 8	hydrographic surveying, nonfiction	258	● ▲ ■ three copies (PDF)
Marine Snow Falling Into the Dark	Grade 8	marine snow and the deep sea, nonfiction	265	● ▲ ■ three copies (PDF)
Mountain Snowpack, the Slow Water Tank	Grade 8	snowpack and water supply, nonfiction	288	● ▲ ■ three copies (PDF)
Nine Hundred Photographs of a Walking Squirrel	Grade 8	stop-motion animation, fiction	274	● ▲ ■ three copies (PDF)
Open Meeting Laws and the Unlocked Door	Grade 8	open government meetings, nonfiction	257	● ▲ ■ three copies (PDF)
Perspective Comes to the Canvas	Grade 8	art and drawing, nonfiction	262	● ▲ ■ three copies (PDF)
Plants That Catch Insects	Grade 8	carnivorous plants and bogs, nonfiction	288	● ▲ ■ three copies (PDF)
Reading a Nutrition Label	Grade 8	food and health, nonfiction	267	● ▲ ■ three copies (PDF)
Rescuing a Painting Without Making It New	Grade 8	art conservation, nonfiction	261	● ▲ ■ three copies (PDF)
Rue Takes the Straight Line Through the Thicket	Grade 8	first orienteering meet, fiction	296	● ▲ ■ three copies (PDF)
Rules That Protect People Who Help in Emergencies	Grade 8	good samaritan laws, nonfiction	255	● ▲ ■ three copies (PDF)
Salt Squeezed Out of Freezing Seawater	Grade 8	sea ice and brine, nonfiction	250	● ▲ ■ three copies (PDF)
Ships Climb Hills of Water	Grade 8	the Panama Canal, nonfiction	272	● ▲ ■ three copies (PDF)
Sleep and the Teenage Brain	Grade 8	sleep and health, nonfiction	261	● ▲ ■ three copies (PDF)
Snowshoe Tracks to the Closed Weather Station	Grade 8	tracks leading to a mountain hut, fiction	261	● ▲ ■ three copies (PDF)
Spending the Water Under Your Feet	Grade 8	aquifers and groundwater use, nonfiction	287	● ▲ ■ three copies (PDF)
The Arctic Tern Who Took the Long Way	Grade 8	a seabird on a huge journey, fiction	268	● ▲ ■ three copies (PDF)
The Axolotl Who Stayed in the Canal	Grade 8	a water creature that never leaves, fiction	277	● ▲ ■ three copies (PDF)
The Borrowed Violin	Grade 8	kindness and courage, fiction	302	● ▲ ■ three copies (PDF)
The Bridge Test	Grade 8	teamwork, fiction	319	● ▲ ■ three copies (PDF)
The Canyon Echo That Answered Late	Grade 8	a delayed echo that scrambles shouts, fiction	273	● ▲ ■ three copies (PDF)
The Compromise That Gave Congress Two Chambers	Grade 8	the Connecticut Compromise, nonfiction	253	● ▲ ■ three copies (PDF)
The Correction on Page Two	Grade 8	a school newspaper mistake, fiction	288	● ▲ ■ three copies (PDF)
The Cuttlefish Who Could Not Hide His Mood	Grade 8	a color-changing sea animal, fiction	270	● ▲ ■ three copies (PDF)
The Fist-Sized Filters Beside Your Spine	Grade 8	how the kidneys clean blood, nonfiction	255	● ▲ ■ three copies (PDF)
The Foley Artist's Studio of Odd Props	Grade 8	film sound jobs, nonfiction	271	● ▲ ■ three copies (PDF)
The Fossil That Was Really Fruitcake	Grade 8	a science club's mistaken discovery, fiction	272	● ▲ ■ three copies (PDF)
The Fungus Partners Beneath a Forest	Grade 8	fungi and tree roots, nonfiction	280	● ▲ ■ three copies (PDF)
The Gaps That Keep Bridges From Buckling	Grade 8	heat and expansion, nonfiction	261	● ▲ ■ three copies (PDF)
The Glass Float Washed Up With a Return Address	Grade 8	a glass fishing float on a beach, fiction	250	● ▲ ■ three copies (PDF)
The Great Sneeze of Hollow Creek	Grade 8	a tall tale about a mighty sneeze, fiction	283	● ▲ ■ three copies (PDF)
The Greek Gear Box Pulled from a Shipwreck	Grade 8	the Antikythera mechanism, nonfiction	272	● ▲ ■ three copies (PDF)
The Headset Voice Behind Every Stage Cue	Grade 8	theater stage managers, nonfiction	263	● ▲ ■ three copies (PDF)
The Hidden Water Inside a Cotton Shirt	Grade 8	virtual water in products, nonfiction	259	● ▲ ■ three copies (PDF)
The Honeyguide Who Waited for a Partner	Grade 8	a bird that leads to honey, fiction	260	● ▲ ■ three copies (PDF)
The Hornbill Who Brought Figs to a Sealed Tree	Grade 8	a hornbill feeding a nesting mate, fiction	262	● ▲ ■ three copies (PDF)
The Jam Jar Label Mix-Up on Marlow Street	Grade 8	a label mix-up at a market, fiction	266	● ▲ ■ three copies (PDF)
The Last Pitch	Grade 8	sports and friendship, fiction	343	● ▲ ■ three copies (PDF)
The Lens That Changed Lighthouses	Grade 8	light and technology, nonfiction	286	● ▲ ■ three copies (PDF)
The Lyrebird and the Honest Warning	Grade 8	a mimic who loses trust, fiction	271	● ▲ ■ three copies (PDF)
The Night Market Stall With No Number	Grade 8	an unnumbered stall at a night market, fiction	289	● ▲ ■ three copies (PDF)
The Nutcracker Who Forgot Her Pines	Grade 8	a bird that buries seeds, fiction	274	● ▲ ■ three copies (PDF)
The Odd Water That Saves Pond Fish	Grade 8	why ice floats, nonfiction	254	● ▲ ■ three copies (PDF)
The Okapi Calf and the Striped Legs	Grade 8	a calf lost in dim forest, fiction	280	● ▲ ■ three copies (PDF)
The Orb Weaver's Morning Repairs	Grade 8	a spider who rebuilds her web, fiction	259	● ▲ ■ three copies (PDF)
The Path Across Your Yard: How Easements Work	Grade 8	land easements and shared use, nonfiction	259	● ▲ ■ three copies (PDF)
The Planetarium Sky Skipped Cassiopeia	Grade 8	a planetarium show with a gap, fiction	275	● ▲ ■ three copies (PDF)
The Pronghorn and the Ranch Fence	Grade 8	a fast runner stopped by a fence, fiction	277	● ▲ ■ three copies (PDF)
The Purple Route on the Slanted Wall	Grade 8	a bouldering problem, fiction	289	● ▲ ■ three copies (PDF)
The Quiet Float That Refills the Toilet Tank	Grade 8	the toilet tank float valve, nonfiction	299	● ▲ ■ three copies (PDF)
The Seed Packet Labeled in Two Handwritings	Grade 8	a mislabeled community seed library, fiction	259	● ▲ ■ three copies (PDF)
The Shortcut That Took Three Days	Grade 8	a tall tale about a very long shortcut, fiction	290	● ▲ ■ three copies (PDF)
The Spinning Balls That Steered a Steam Engine	Grade 8	the centrifugal governor, nonfiction	268	● ▲ ■ three copies (PDF)
The Substitute Who Could Not Stop Punning	Grade 8	a substitute teacher who loves puns, fiction	292	● ▲ ■ three copies (PDF)
The Summer Dead Zone at a River's Mouth	Grade 8	river runoff and low oxygen, nonfiction	260	● ▲ ■ three copies (PDF)
The Surveyor and the Missing Corner	Grade 8	land surveying, nonfiction	266	● ▲ ■ three copies (PDF)
The Typewriter That Would Not Type an E	Grade 8	a broken attic typewriter, fiction	281	● ▲ ■ three copies (PDF)
Town Rule, State Law or National Law?	Grade 8	layers of government, nonfiction	278	● ▲ ■ three copies (PDF)
Twelve Steps Up the Clock Tower Stairs	Grade 8	a number puzzle on tower stairs, fiction	274	● ▲ ■ three copies (PDF)
Two Dennises, One Pizza Order	Grade 8	a mix-up over two similar names, fiction	262	● ▲ ■ three copies (PDF)
Two Metals That Bend When They Warm Up	Grade 8	the bimetallic strip, nonfiction	268	● ▲ ■ three copies (PDF)
Weaving a Picture with Holes in Cards	Grade 8	the Jacquard loom, nonfiction	255	● ▲ ■ three copies (PDF)
What Really Tells You to Breathe	Grade 8	how the body controls breathing, nonfiction	258	● ▲ ■ three copies (PDF)
When a Sugar Pill Soothes Pain	Grade 8	the placebo effect, nonfiction	285	● ▲ ■ three copies (PDF)
When Voters Write the Law Themselves	Grade 8	ballot initiatives and referendums, nonfiction	279	● ▲ ■ three copies (PDF)
Who Moved the Smoker Behind the Beehives?	Grade 8	a beekeeper's missing tool, fiction	269	● ▲ ■ three copies (PDF)
Why a Falling Raindrop Stops Speeding Up	Grade 8	air resistance and terminal speed, nonfiction	255	● ▲ ■ three copies (PDF)
Why a Guitar Needs an Empty Box	Grade 8	resonance and sound boxes, nonfiction	270	● ▲ ■ three copies (PDF)
Why a Lake Turns Over Twice a Year	Grade 8	lake layers and turnover, nonfiction	278	● ▲ ■ three copies (PDF)
Why a Type Designer Draws the O Too Tall	Grade 8	type design, nonfiction	276	● ▲ ■ three copies (PDF)
Why a Wet Finger Makes a Glass Sing	Grade 8	friction and resonance, nonfiction	256	● ▲ ■ three copies (PDF)
Why Changing the Constitution Is Hard on Purpose	Grade 8	amending the Constitution, nonfiction	256	● ▲ ■ three copies (PDF)
Why Leaves Turn Colors in Autumn	Grade 8	autumn leaf color, nonfiction	292	● ▲ ■ three copies (PDF)
Why Nobody Sells Streetlights Door to Door	Grade 8	public goods and taxes, nonfiction	262	● ▲ ■ three copies (PDF)
Why Teen Sleep Clocks Run Late	Grade 8	teenagers and sleep timing, nonfiction	268	● ▲ ■ three copies (PDF)
Why Water Stays in a Spinning Salad Spinner	Grade 8	inertia and circular motion, nonfiction	258	● ▲ ■ three copies (PDF)
Why Wet Skin Feels Colder Than the Air	Grade 8	evaporation and cooling, nonfiction	257	● ▲ ■ three copies (PDF)
Why You Stop Smelling Your Own House	Grade 8	sensory adaptation and smell, nonfiction	269	● ▲ ■ three copies (PDF)
Why Your Car Wheels Need to Disagree in a Turn	Grade 8	the car differential, nonfiction	275	● ▲ ■ three copies (PDF)
Yeast: The Fungus in the Bread	Grade 8	yeast and bread dough, nonfiction	269	● ▲ ■ three copies (PDF)

Which copy does this child get?

Have the child read a grade-level passage aloud for about a minute (the level finder has the full steps). Count the words they read and the mistakes. Nothing you type here is saved.

Words read Mistakes

Type both numbers to see the copy.

True books at more levels

African Wild Dogs

How do African wild dogs hunt as a team?

Look at the Wild Dog, written for Pre-K and kindergarten (teacher key)
Pack of Big Ears, written for 1st grade (teacher key)
Dogs That Hunt Together, written for 2nd grade (teacher key)
Life in the Pack, written for 3rd grade (teacher key)
The Pack Across the Grass, written for 4th grade (teacher key)
Measured on the Run, written for 5th grade (teacher key)
A Pack's Home Range, written for 6th grade (teacher key)
Hunting by Sight, written for 7th grade (teacher key)
Collars, Calls and a Comeback, written for 8th grade (teacher key)
Fitted with Collars, written for 9th grade (teacher key)
The Sneeze Vote, written for 10th grade (teacher key)
Three Brothers and a Quorum, written for 11th grade (teacher key)
What Collars Cannot Tell Us, written for 12th grade and up (teacher key)

Airplanes

How do airplanes fly?

Wings Up, written for Pre-K and kindergarten (teacher key)
Up in the Sky, written for 1st grade (teacher key)
Four Pushes and Pulls, written for 2nd grade (teacher key)
Wings, Tails and Flaps, written for 3rd grade (teacher key)
How a Plane Gets Off the Ground, written for 4th grade (teacher key)
Air Pushes Back, written for 5th grade (teacher key)
Inside a Jet Engine, written for 6th grade (teacher key)
The Lift Myth, written for 7th grade (teacher key)
Steering in Three Turns, written for 8th grade (teacher key)
How Engineers Know, written for 9th grade (teacher key)
Stages, Stalls and Jumbo Jets, written for 10th grade (teacher key)
Instruments, Metals and the Concorde, written for 11th grade (teacher key)
Two Ways to Describe Lift, written for 12th grade and up (teacher key)

Albert Einstein

Who was Albert Einstein?

Albert the Physicist, written for Pre-K and kindergarten (teacher key)
Albert and the Compass, written for 1st grade (teacher key)
A Needle That Moved, written for 2nd grade (teacher key)
The Path to Fame, written for 3rd grade (teacher key)
The Patent Office Physicist, written for 4th grade (teacher key)
A Boy, a Compass and a Theory, written for 5th grade (teacher key)
Light, Gravity and Time, written for 6th grade (teacher key)
From a Compass to a Patent Desk, written for 7th grade (teacher key)
Light, Time and Special Relativity, written for 8th grade (teacher key)
When Time Runs Slow, written for 9th grade (teacher key)
Testing General Relativity, written for 10th grade (teacher key)
Doubts, Tests and Acceptance, written for 11th grade (teacher key)
From Light Beams to Open Questions, written for 12th grade and up (teacher key)

Aliens and UFOs

Is there life on other planets?

Look and See, written for Pre-K and kindergarten (teacher key)
Far Away Worlds, written for 1st grade (teacher key)
Robots on a Red Planet, written for 2nd grade (teacher key)
Strange Lights, Far Planets, written for 3rd grade (teacher key)
Clues From Sky and Ground, written for 4th grade (teacher key)
Finding a Faraway Planet, written for 5th grade (teacher key)
Reports, Evidence and Planets, written for 6th grade (teacher key)
How Scientists Look, written for 7th grade (teacher key)
Worlds Around Other Stars, written for 8th grade (teacher key)
What the Investigators Found, written for 9th grade (teacher key)
The Numbers Behind the Search, written for 10th grade (teacher key)
Counting Civilizations, written for 11th grade (teacher key)
Sky Reports and Distant Worlds, written for 12th grade and up (teacher key)

Alligator Snapping Turtles

How does an alligator snapping turtle catch fish?

Look at the Turtle, written for Pre-K and kindergarten (teacher key)
The Dinosaur of Turtles, written for 1st grade (teacher key)
A Giant in the Water, written for 2nd grade (teacher key)
The Worm Trick, written for 3rd grade (teacher key)
Lurking on the Riverbed, written for 4th grade (teacher key)
Patient as a Riverbed Rock, written for 5th grade (teacher key)
The Patient Hunter of the Gulf Rivers, written for 6th grade (teacher key)
Still on the River Bottom, written for 7th grade (teacher key)
Reading the Water, written for 8th grade (teacher key)
Turtles of the Gulf Rivers, written for 9th grade (teacher key)
Following the River Turtles, written for 10th grade (teacher key)
Family Trees of the Gulf, written for 11th grade (teacher key)
The Turtle with a Lure in Its Mouth, written for 12th grade and up (teacher key)

Amelia Earhart

Who was Amelia Earhart?

Amelia Flies, written for Pre-K and kindergarten (teacher key)
Learning to Fly, written for 1st grade (teacher key)
Records in the Sky, written for 2nd grade (teacher key)
Passenger, Then Pilot, written for 3rd grade (teacher key)
The Flight Over the Ocean, written for 4th grade (teacher key)
An International Hero, written for 5th grade (teacher key)
Flights, Records and a Question, written for 6th grade (teacher key)
Paying for the Sky, written for 7th grade (teacher key)
The Little Red Bus and Beyond, written for 8th grade (teacher key)
Fourteen Hours Over the Atlantic, written for 9th grade (teacher key)
Racing for the Record Books, written for 10th grade (teacher key)
A Flying Laboratory, written for 11th grade (teacher key)
The Woman Who Chased the Horizon, written for 12th grade and up (teacher key)

American Alligators

How is an alligator different from a crocodile?

A Wide, Round Snout, written for Pre-K and kindergarten (teacher key)
Hidden Teeth, Big Teeth, written for 1st grade (teacher key)
Alligator Snouts and Teeth, written for 2nd grade (teacher key)
A Big Reptile of the Swamps, written for 3rd grade (teacher key)
Alligators of the Slow Rivers, written for 4th grade (teacher key)
Crocodilians Close Up, written for 5th grade (teacher key)
Listed, Then Removed, written for 6th grade (teacher key)
Inside an Alligator's Body, written for 7th grade (teacher key)
Alligator Records and Lifespans, written for 8th grade (teacher key)
Sensing the Water, written for 9th grade (teacher key)
An Old Kind of Animal, written for 10th grade (teacher key)
Counting Alligators, written for 11th grade (teacher key)
What the Genomes Show, written for 12th grade and up (teacher key)

Ancient Egypt

Who built the pyramids?

Stone Homes for Kings, written for Pre-K and kindergarten (teacher key)
Land of the Nile, written for 1st grade (teacher key)
Stone, Sand and Sphinx, written for 2nd grade (teacher key)
Who Built the Pyramids?, written for 3rd grade (teacher key)
Egypt on the Nile, written for 4th grade (teacher key)
Pyramid Puzzles, written for 5th grade (teacher key)
Kings and Queens of the Nile, written for 6th grade (teacher key)
Voices on Papyrus, written for 7th grade (teacher key)
The People Behind the Pyramids, written for 8th grade (teacher key)
Tombs, Treasure and a Boy King, written for 9th grade (teacher key)
Reading the Evidence at Giza, written for 10th grade (teacher key)
First Kings to Rome, written for 11th grade (teacher key)
What the Evidence Says About Egypt, written for 12th grade and up (teacher key)

Ancient Greece

What did the ancient Greeks give us?

A Land by the Sea, written for Pre-K and kindergarten (teacher key)
Greece, Games and Tales, written for 1st grade (teacher key)
Gifts from Greece, written for 2nd grade (teacher key)
What the Greeks Gave Us, written for 3rd grade (teacher key)
Ideas Born in Greece, written for 4th grade (teacher key)
A City That Voted, written for 5th grade (teacher key)
Teachers, Thinkers, Tinkerers, written for 6th grade (teacher key)
Stage, Song and Story, written for 7th grade (teacher key)
Ways of Working It Out, written for 8th grade (teacher key)
How We Know About the Greeks, written for 9th grade (teacher key)
Voting, Stages and Doubts, written for 10th grade (teacher key)
Disputed Pasts, written for 11th grade (teacher key)
What Greece Left Behind, written for 12th grade and up (teacher key)

Andean Condors

How does an Andean condor fly without flapping?

Look at the Big Bird, written for Pre-K and kindergarten (teacher key)
The Bird Above the Andes, written for 1st grade (teacher key)
Condor of the High Mountains, written for 2nd grade (teacher key)
Flying Without Flapping, written for 3rd grade (teacher key)
A Wingspan Over the Andes, written for 4th grade (teacher key)
Life on Rising Air, written for 5th grade (teacher key)
Giants of the Andes Sky, written for 6th grade (teacher key)
Built to Scavenge, written for 7th grade (teacher key)
Tracking the Condors, written for 8th grade (teacher key)
Where the Flapping Happens, written for 9th grade (teacher key)
Numbers From the Condor Tags, written for 10th grade (teacher key)
Reading a Condor's Feathers, written for 11th grade (teacher key)
The Cost of Getting Airborne, written for 12th grade and up (teacher key)

Animal Families

Do animals have families?

Who Is in the Family?, written for Pre-K and kindergarten (teacher key)
Who Looks After the Babies?, written for 1st grade (teacher key)
Packs, Prides and Troops, written for 2nd grade (teacher key)
Staying Together, Moving On, written for 3rd grade (teacher key)
A Family Is a Team, written for 4th grade (teacher key)
Who Stays and Who Goes, written for 5th grade (teacher key)
School at Home, written for 6th grade (teacher key)
Watching Families for Decades, written for 7th grade (teacher key)
Knowing Your Own, written for 8th grade (teacher key)
Raising Someone Else's Young, written for 9th grade (teacher key)
The Evidence for Helpers, written for 10th grade (teacher key)
Kin, Helpers and Long Studies, written for 11th grade (teacher key)
Why Animals Cooperate, written for 12th grade and up (teacher key)

The Arctic and Antarctica

What are the Arctic and Antarctica like, and how are they different?

Ice at the Top and Bottom, written for Pre-K and kindergarten (teacher key)
Bears and Penguins on Ice, written for 1st grade (teacher key)
Cold Lands and Icy Seas, written for 2nd grade (teacher key)
Staying Warm in the Ice, written for 3rd grade (teacher key)
An Ocean and a Continent, written for 4th grade (teacher key)
Ice, Treaties and Survivors, written for 5th grade (teacher key)
Dark Winters, Fierce Winds, written for 6th grade (teacher key)
Drawing the Polar Lines, written for 7th grade (teacher key)
Ice by the Numbers, written for 8th grade (teacher key)
Reading the Ice, written for 9th grade (teacher key)
Rules and Research at the Bottom of the World, written for 10th grade (teacher key)
Measuring the Extremes, written for 11th grade (teacher key)
What the Poles Hold, written for 12th grade and up (teacher key)

Arguing and Making Up

How do you make up after a fight?

Pals Make Up, written for Pre-K and kindergarten (teacher key)
Say Sorry, Be Kind, written for 1st grade (teacher key)
After the Fight, written for 2nd grade (teacher key)
How to Make Up, written for 3rd grade (teacher key)
Fights and Fixes, written for 4th grade (teacher key)
Cooling Down, Starting Over, written for 5th grade (teacher key)
The Power of Sorry, written for 6th grade (teacher key)
Friction Between Friends, written for 7th grade (teacher key)
The Repair Work, written for 8th grade (teacher key)
The Parts of an Apology, written for 9th grade (teacher key)
Why Friends Fight, written for 10th grade (teacher key)
Listening Before Answering, written for 11th grade (teacher key)
The Research on Repair, written for 12th grade and up (teacher key)

Artificial Intelligence

What is AI?

What Is AI?, written for Pre-K and kindergarten (teacher key)
Computers That Learn, written for 1st grade (teacher key)
Smart Machines, written for 2nd grade (teacher key)
How AI Learns, written for 3rd grade (teacher key)
AI Learns from Examples, written for 4th grade (teacher key)
Can Machines Think?, written for 5th grade (teacher key)
Smart, but Not Always Right, written for 6th grade (teacher key)
Recipes and Learning Machines, written for 7th grade (teacher key)
What Counts as AI?, written for 8th grade (teacher key)
Testing Machines, Trusting Machines, written for 9th grade (teacher key)
What Researchers Argue About, written for 10th grade (teacher key)
How Good Is AI, Really?, written for 11th grade (teacher key)
Open Questions in AI, written for 12th grade and up (teacher key)

Astronauts and Space Travel

How do astronauts live in space?

Floating Up High, written for Pre-K and kindergarten (teacher key)
Life Up on the Station, written for 1st grade (teacher key)
Home Above the Sky, written for 2nd grade (teacher key)
A Home Above Earth, written for 3rd grade (teacher key)
Rockets, Rules and Routines, written for 4th grade (teacher key)
A Day on the Station, written for 5th grade (teacher key)
Liftoff, Suits and Firsts, written for 6th grade (teacher key)
The Station, Rockets and Beyond, written for 7th grade (teacher key)
People, Suits and the Road to Mars, written for 8th grade (teacher key)
Falling Around Earth, written for 9th grade (teacher key)
Training, Tracking and Treaty, written for 10th grade (teacher key)
Living Beyond Earth, written for 11th grade (teacher key)
Rockets, Suits and the Moon, written for 12th grade and up (teacher key)

Baby Animals

How do baby animals grow up?

Little Ones Grow, written for Pre-K and kindergarten (teacher key)
Small Starts, written for 1st grade (teacher key)
Ready or Helpless?, written for 2nd grade (teacher key)
Who Looks After the Babies?, written for 3rd grade (teacher key)
Growing Up in Stages, written for 4th grade (teacher key)
The First Steps Away, written for 5th grade (teacher key)
Built for the First Days, written for 6th grade (teacher key)
Born Ready, Born Helpless, written for 7th grade (teacher key)
From Helpless to Ready, written for 8th grade (teacher key)
How Scientists Watch the Young, written for 9th grade (teacher key)
What the Long Studies Show, written for 10th grade (teacher key)
How We Know How Babies Grow, written for 11th grade (teacher key)
The Long Work of Raising Young, written for 12th grade and up (teacher key)

Bald Eagles

How do bald eagles hunt and build their nests?

Look at the Eagle, written for Pre-K and kindergarten (teacher key)
A Bird With a White Head, written for 1st grade (teacher key)
Fish Eagle Days, written for 2nd grade (teacher key)
Sticks, Fish and Sharp Eyes, written for 3rd grade (teacher key)
Wings Over Water, written for 4th grade (teacher key)
The Eagle's Year, written for 5th grade (teacher key)
Meet the Bald Eagle, written for 6th grade (teacher key)
Built for the Sky, written for 7th grade (teacher key)
Built to Hunt and Nest, written for 8th grade (teacher key)
Ranges, Routes and Roosts, written for 9th grade (teacher key)
A Poison, a Ban and a Comeback, written for 10th grade (teacher key)
Eagles, Laws and a Comeback, written for 11th grade (teacher key)
A Closer Look at Bald Eagles, written for 12th grade and up (teacher key)

Barracudas

How does a barracuda hunt?

Look at the Barracuda, written for Pre-K and kindergarten (teacher key)
A Fish With Big Teeth, written for 1st grade (teacher key)
Long, Slim and Silver, written for 2nd grade (teacher key)
A Torpedo in Warm Seas, written for 3rd grade (teacher key)
The Ambush Fish, written for 4th grade (teacher key)
Eyes on the Reef, written for 5th grade (teacher key)
From Nursery to Reef, written for 6th grade (teacher key)
A Name With a Pike in It, written for 7th grade (teacher key)
Kaku and the Fishermen, written for 8th grade (teacher key)
Slow Motion Strike, written for 9th grade (teacher key)
Ram-Biting, written for 10th grade (teacher key)
Reading a Reef Fish, written for 11th grade (teacher key)
Counting the Years of a Barracuda, written for 12th grade and up (teacher key)

Basketball

How did basketball begin, and how is it played?

Hoops High Up, written for Pre-K and kindergarten (teacher key)
A Game Made in 1891, written for 1st grade (teacher key)
Hoops, Points and Peach Baskets, written for 2nd grade (teacher key)
Hoops, Boards and Clocks, written for 3rd grade (teacher key)
From a School Gym to the NBA, written for 4th grade (teacher key)
Then and Now on the Court, written for 5th grade (teacher key)
From Peach Baskets to the Olympics, written for 6th grade (teacher key)
The Rules Naismith Wrote, written for 7th grade (teacher key)
Rain, Ladders and Rule Changes, written for 8th grade (teacher key)
Typed Rules and New Leagues, written for 9th grade (teacher key)
Clocks, Courts and Cups, written for 10th grade (teacher key)
Twenty-Four Seconds and a Line, written for 11th grade (teacher key)
What Basketball Records Remember, written for 12th grade and up (teacher key)

Bearded Vultures

Why does a bearded vulture eat bones?

Look at the Big Bird, written for Pre-K and kindergarten (teacher key)
A Bird With a Beard, written for 1st grade (teacher key)
Bone Eater of the Peaks, written for 2nd grade (teacher key)
Bones, Rocks and Sky, written for 3rd grade (teacher key)
The Bone Breaker, written for 4th grade (teacher key)
Orange Feathers, White Feathers, written for 5th grade (teacher key)
A Name That Got It Wrong, written for 6th grade (teacher key)
Lonely Cliffs, Large Bones, written for 7th grade (teacher key)
Two Counts of a Bone Diet, written for 8th grade (teacher key)
What Nobody Has Settled, written for 9th grade (teacher key)
Marrow and Distance, written for 10th grade (teacher key)
Slow Years in the Cliffs, written for 11th grade (teacher key)
Bringing Birds Back, written for 12th grade and up (teacher key)

Bees

How do bees make honey?

Bees and Their Honey, written for 1st grade (teacher key)
Life in the Hive, written for 2nd grade (teacher key)
Where Honey Comes From, written for 3rd grade (teacher key)
Inside a Honey Bee Colony, written for 4th grade (teacher key)
Bees, Honey and Pollination, written for 5th grade (teacher key)

Being Different

Is it okay to be different?

Same and Not the Same, written for Pre-K and kindergarten (teacher key)
Look, We Are Not the Same, written for 1st grade (teacher key)
All Kinds of Kids, written for 2nd grade (teacher key)
Different Is Part of Being People, written for 3rd grade (teacher key)
Everyone Is Different, written for 4th grade (teacher key)
Same Planet, Different People, written for 5th grade (teacher key)
Some Differences Hide, written for 6th grade (teacher key)
Alike in Almost Every Letter, written for 7th grade (teacher key)
Making Room for Differences, written for 8th grade (teacher key)
The Many Ways People Differ, written for 9th grade (teacher key)
Rules and Ramps for Difference, written for 10th grade (teacher key)
Sameness in the Genome, Difference in Daily Life, written for 11th grade (teacher key)
Variation Is the Human Norm, written for 12th grade and up (teacher key)

Belly Buttons

Why do we have belly buttons?

My First Scar, written for Pre-K and kindergarten (teacher key)
The Dent in the Middle, written for 1st grade (teacher key)
A Secret Scar, written for 2nd grade (teacher key)
The Cord That Fed You, written for 3rd grade (teacher key)
From Stump to Navel, written for 4th grade (teacher key)
The Cord and the Scar, written for 5th grade (teacher key)
The Navel Explained, written for 6th grade (teacher key)
The Scar Everyone Wears, written for 7th grade (teacher key)
The Switch at Birth, written for 8th grade (teacher key)
When to Cut the Cord, written for 9th grade (teacher key)
Old Plumbing in the Body, written for 10th grade (teacher key)
Anatomy of a Lifeline, written for 11th grade (teacher key)
What the Navel Remembers, written for 12th grade and up (teacher key)

Bigfoot and the Loch Ness Monster

Is Bigfoot real?

Big Foot, Big Lake, written for Pre-K and kindergarten (teacher key)
Big Feet and a Long Neck, written for 1st grade (teacher key)
Two Mystery Stories, written for 2nd grade (teacher key)
Tracks, Photos and Tests, written for 3rd grade (teacher key)
How Scientists Check a Monster, written for 4th grade (teacher key)
The Evidence on the Table, written for 5th grade (teacher key)
What a Search Can and Cannot Show, written for 6th grade (teacher key)
Following the Footprints, written for 7th grade (teacher key)
Photos That Fooled Us, written for 8th grade (teacher key)
Hair, Teeth and Water, written for 9th grade (teacher key)
Sound Under the Loch, written for 10th grade (teacher key)
The Animals Nobody Had Seen, written for 11th grade (teacher key)
The Case Against Certainty, written for 12th grade and up (teacher key)

The Biggest Animals

What is the biggest animal ever?

Big, Big, Big, written for Pre-K and kindergarten (teacher key)
Who Is Biggest?, written for 1st grade (teacher key)
Giants Big and Small, written for 2nd grade (teacher key)
Heavier Than Dinosaurs, written for 3rd grade (teacher key)
Giants of Land and Deep, written for 4th grade (teacher key)
Bigger Than a Dinosaur, written for 5th grade (teacher key)
When Giants Were Hunted, written for 6th grade (teacher key)
Measuring Giants, written for 7th grade (teacher key)
Weighing a Whale, written for 8th grade (teacher key)
Bones, Dives and Doubts, written for 9th grade (teacher key)
The Argument Over Size, written for 10th grade (teacher key)
How Do You Weigh a Giant?, written for 11th grade (teacher key)
What Counts as Biggest, written for 12th grade and up (teacher key)

Black Bears

How do black bears live in the forest?

Look at the Black Bear, written for Pre-K and kindergarten (teacher key)
A Bear in the Trees, written for 1st grade (teacher key)
Bears of the Forest, written for 2nd grade (teacher key)
A Year in the Life of a Bear, written for 3rd grade (teacher key)
The Forest's Smallest Bear, written for 4th grade (teacher key)
Smart and Curious Bears, written for 5th grade (teacher key)
How a Black Bear Gets Through the Year, written for 6th grade (teacher key)
Numbers on a Bear, written for 7th grade (teacher key)
Counting the Bears, written for 8th grade (teacher key)
Bear Numbers and Bear Types, written for 9th grade (teacher key)
A Bear Family Tree and a Winter Sleep, written for 10th grade (teacher key)
What Bears Tell Us, written for 11th grade (teacher key)
Questions Still Open About Bears, written for 12th grade and up (teacher key)

Black Caimans

What is a black caiman?

The Dark Caiman, written for Pre-K and kindergarten (teacher key)
Big and Dark in the Amazon, written for 1st grade (teacher key)
What a Black Caiman Eats and Where It Nests, written for 2nd grade (teacher key)
Big Old Males of the Amazon, written for 3rd grade (teacher key)
Nests, Voices and Skins, written for 4th grade (teacher key)
Hunted, Then Protected, written for 5th grade (teacher key)
What We Know About a Giant, written for 6th grade (teacher key)
Built to Hunt in the Dark, written for 7th grade (teacher key)
Measuring a Giant, written for 8th grade (teacher key)
Tracking Caimans at Agami Pond, written for 9th grade (teacher key)
Counting Caimans in a Drought, written for 10th grade (teacher key)
Surveys, Nests and Neighbours, written for 11th grade (teacher key)
After the Skin Trade, written for 12th grade and up (teacher key)

Black Holes

What is a black hole?

What Is a Black Hole?, written for 1st grade (teacher key)
Black Holes, written for 2nd grade (teacher key)
All About Black Holes, written for 3rd grade (teacher key)
Inside the Black Hole Story, written for 4th grade (teacher key)
Black Holes Explained, written for 5th grade (teacher key)
Where Light Cannot Escape, written for 6th grade (teacher key)
From Dark Stars to Pictures, written for 7th grade (teacher key)
Orbiting a Giant, written for 8th grade (teacher key)
Weighing the Unseen, written for 9th grade (teacher key)
Hard Questions at the Edge, written for 10th grade (teacher key)
What Nobody Can See, written for 11th grade (teacher key)

Black Mambas

How fast is a black mamba?

The Snake That Is Not Black, written for Pre-K and kindergarten (teacher key)
The Mamba With a Blue-Black Mouth, written for 1st grade (teacher key)
A Snake Called Black, written for 2nd grade (teacher key)
A Snake With a Blue-Black Mouth, written for 3rd grade (teacher key)
Blue-Black Mouth, Gray Body, written for 4th grade (teacher key)
Across Sub-Saharan Africa, written for 5th grade (teacher key)
Smooth Scales and a Coffin-Shaped Head, written for 6th grade (teacher key)
Fast on the Ground, Gray in Colour, written for 7th grade (teacher key)
Gray Snake, Blue-Black Mouth, written for 8th grade (teacher key)
How the Black Mamba Got Its Names, written for 9th grade (teacher key)
Ground-Living Mamba, Tree-Living Cousins, written for 10th grade (teacher key)
A Mamba Family Tree, written for 11th grade (teacher key)
Mambas, Venom and the Evidence, written for 12th grade and up (teacher key)

Bobcats

What is a bobcat, and where does it live?

Tufts and a Tail, written for Pre-K and kindergarten (teacher key)
The Cat with the Short Tail, written for 1st grade (teacher key)
A Cat Named for Its Tail, written for 2nd grade (teacher key)
Tails, Tufts and Twilight, written for 3rd grade (teacher key)
The Patient Cat of the Brush, written for 4th grade (teacher key)
Scent Marks and Stub Tails, written for 5th grade (teacher key)
A Wild Cat From Canada to Mexico, written for 6th grade (teacher key)
Quiet Feet and Tufted Ears, written for 7th grade (teacher key)
How Far a Bobcat Roams, written for 8th grade (teacher key)
Measuring a Bobcat's Ground, written for 9th grade (teacher key)
A Wild Cat in the Numbers, written for 10th grade (teacher key)
Rocky Canyons and Rabbit Country, written for 11th grade (teacher key)
One Cat, Many Landscapes, written for 12th grade and up (teacher key)

Boogers and Snot

What are boogers made of?

Boogers Are Dry Snot, written for Pre-K and kindergarten (teacher key)
The Nose Has a Job, written for 1st grade (teacher key)
Where the Snot Goes, written for 2nd grade (teacher key)
When the Nose Runs, written for 3rd grade (teacher key)
The Mucus Escalator, written for 4th grade (teacher key)
The Sticky Shield, written for 5th grade (teacher key)
One Nostril at a Time, written for 6th grade (teacher key)
The Nose, by the Numbers, written for 7th grade (teacher key)
Front Line of Defense, written for 8th grade (teacher key)
The Slippery Shield, written for 9th grade (teacher key)
Your Nose Takes Turns, written for 10th grade (teacher key)
What We Do Not Know About Mucus, written for 11th grade (teacher key)
Disarm, Do Not Destroy, written for 12th grade and up (teacher key)

Bugs That Clean Up

Which bugs eat dead things?

Dung, Wood and Leaves, written for Pre-K and kindergarten (teacher key)
Under the Leaves, written for 1st grade (teacher key)
Nature's Clean-Up Crew, written for 2nd grade (teacher key)
Helpers in the Dirt, written for 3rd grade (teacher key)
Recycling in the Soil, written for 4th grade (teacher key)
Nature's Clean-Up Crew, written for 5th grade (teacher key)
Farmers, Pests and Helpers, written for 6th grade (teacher key)
Counting the Clean-Up Crew, written for 7th grade (teacher key)
Partners in Decay, written for 8th grade (teacher key)
The Pasture Crew, written for 9th grade (teacher key)
Gardens Below the Leaves, written for 10th grade (teacher key)
Evidence From the Soil, written for 11th grade (teacher key)
Open Questions Underfoot, written for 12th grade and up (teacher key)

Bull Sharks

How can a bull shark live in rivers?

Shark in the River, written for Pre-K and kindergarten (teacher key)
Where River Meets Sea, written for 1st grade (teacher key)
River Sharks, written for 2nd grade (teacher key)
Up the River, written for 3rd grade (teacher key)
A Shark at Home in Rivers, written for 4th grade (teacher key)
Far From the Sea, written for 5th grade (teacher key)
Salt, Fresh and Between, written for 6th grade (teacher key)
Two Kinds of Water, written for 7th grade (teacher key)
Where a Bull Shark Goes, written for 8th grade (teacher key)
Following Bull Sharks, written for 9th grade (teacher key)
Following the Tags, written for 10th grade (teacher key)
Salt, Fresh and the Journey Up, written for 11th grade (teacher key)
What Is Still Being Measured, written for 12th grade and up (teacher key)

Burps and Farts

Why do we burp and fart?

Up and Out, written for Pre-K and kindergarten (teacher key)
Two Ways Out, written for 1st grade (teacher key)
A Day of Gas, written for 2nd grade (teacher key)
What Is in a Fart?, written for 3rd grade (teacher key)
The Gas Makers Inside You, written for 4th grade (teacher key)
Where the Gas Comes From, written for 5th grade (teacher key)
The Daily Gas Budget, written for 6th grade (teacher key)
Counting and Habits, written for 7th grade (teacher key)
Upper Exit, Lower Exit, written for 8th grade (teacher key)
The Gas Inside You, written for 9th grade (teacher key)
The Gut's Gas Ledger, written for 10th grade (teacher key)
Reading the Gut by Its Gas, written for 11th grade (teacher key)
Gas and the Limits of Measurement, written for 12th grade and up (teacher key)

Butterflies

How does a caterpillar become a butterfly?

Egg to Butterfly, written for Pre-K and kindergarten (teacher key)
Butterflies Have Six Legs, written for 1st grade (teacher key)
How a Butterfly Grows, written for 2nd grade (teacher key)
The Monarch's Big Trip, written for 3rd grade (teacher key)
The Life of a Butterfly, written for 4th grade (teacher key)
Rebuilt Inside a Chrysalis, written for 5th grade (teacher key)
How a Butterfly Grows, written for 6th grade (teacher key)
Inside the Chrysalis, written for 7th grade (teacher key)
Counting Monarchs, written for 8th grade (teacher key)
Monarch Numbers and Compass, written for 9th grade (teacher key)
Clocks and Compasses, written for 10th grade (teacher key)
What Carries On, written for 11th grade (teacher key)
Rebuilt in the Chrysalis, written for 12th grade and up (teacher key)

Cats

Why do cats purr?

Why Does a Cat Purr?, written for Pre-K and kindergarten (teacher key)
A Cat Hums, written for 1st grade (teacher key)
Reading a Cat, written for 2nd grade (teacher key)
Cats and Their People, written for 3rd grade (teacher key)
Cats Up Close, written for 4th grade (teacher key)
Cats Join the Village, written for 5th grade (teacher key)
Pets, Hunters and Breeds, written for 6th grade (teacher key)
Inside a Cat's Body, written for 7th grade (teacher key)
The Purr Puzzle, written for 8th grade (teacher key)
How Cats Moved In, written for 9th grade (teacher key)
What the Studies Say, written for 10th grade (teacher key)
Roar, Rumble or Purr?, written for 11th grade (teacher key)
Tame, but How Tame?, written for 12th grade and up (teacher key)

How to Check If Something Is True

How can you tell if something is true?

Is It True?, written for Pre-K and kindergarten (teacher key)
Look and Ask, written for 1st grade (teacher key)
Two Places, written for 2nd grade (teacher key)
Check It Twice, written for 3rd grade (teacher key)
Proof, written for 4th grade (teacher key)
Fact or Opinion?, written for 5th grade (teacher key)
Hoaxes and Myths, written for 6th grade (teacher key)
How Scientists Check, written for 7th grade (teacher key)
Famous Mistakes, written for 8th grade (teacher key)
Evidence, written for 9th grade (teacher key)
How Hoaxes Spread, written for 10th grade (teacher key)
The Method, written for 11th grade (teacher key)
Knowing How You Know, written for 12th grade and up (teacher key)

Cheetahs

How does a cheetah run so fast?

Spots and Speed, written for Pre-K and kindergarten (teacher key)
A Spotted Sprinter, written for 1st grade (teacher key)
Built to Run, written for 2nd grade (teacher key)
Sprinter of the Plains, written for 3rd grade (teacher key)
Tails, Strides and Spots, written for 4th grade (teacher key)
A Body Built for Speed, written for 5th grade (teacher key)
Fast, but Not for Long, written for 6th grade (teacher key)
Zero to 45 in 2.5 Seconds, written for 7th grade (teacher key)
Measuring the Fastest Runner, written for 8th grade (teacher key)
Collars, Cameras and Cheetah DNA, written for 9th grade (teacher key)
A Species With Little Variety, written for 10th grade (teacher key)
Evidence on the Open Plains, written for 11th grade (teacher key)
Reading the Cheetah Genome, written for 12th grade and up (teacher key)

Chess

How do you play chess?

Sit and Play, written for Pre-K and kindergarten (teacher key)
Kings, Queens and Knights, written for 1st grade (teacher key)
Setting Up the Board, written for 2nd grade (teacher key)
Tricks of the Board, written for 3rd grade (teacher key)
Kings of the Board, written for 4th grade (teacher key)
The Champions Table, written for 5th grade (teacher key)
When the Queen Took Over, written for 6th grade (teacher key)
From Chaturanga to Today, written for 7th grade (teacher key)
How Players Think, written for 8th grade (teacher key)
Machines at the Board, written for 9th grade (teacher key)
Rivals and Ratings, written for 10th grade (teacher key)
Unsolved, written for 11th grade (teacher key)
Sixty-Four Squares, Fifteen Centuries, written for 12th grade and up (teacher key)

Cougars

Where do cougars live, and what are their other names?

Hello, Cougar, written for Pre-K and kindergarten (teacher key)
A Cat With Many Names, written for 1st grade (teacher key)
Hunts Alone, Leaps High, written for 2nd grade (teacher key)
From Canada to Chile, written for 3rd grade (teacher key)
Names, Size and Kittens, written for 4th grade (teacher key)
A Territory of Their Own, written for 5th grade (teacher key)
The Cat of Forty Names, written for 6th grade (teacher key)
The Cougar Up Close, written for 7th grade (teacher key)
Cougar Country, written for 8th grade (teacher key)
One Cat Across the Americas, written for 9th grade (teacher key)
How Scientists Know Cougars, written for 10th grade (teacher key)
From Chile to Connecticut, written for 11th grade (teacher key)
What We Know About Pumas, written for 12th grade and up (teacher key)

Coyotes

How do coyotes live so close to people?

Coyotes Near and Far, written for Pre-K and kindergarten (teacher key)
A Coyote in Los Angeles, written for 1st grade (teacher key)
Meet the Coyote, written for 2nd grade (teacher key)
The Take-What-You-Find Animal, written for 3rd grade (teacher key)
How Coyotes Fit In, written for 4th grade (teacher key)
Coyotes Close to Home, written for 5th grade (teacher key)
Yips at Dusk, written for 6th grade (teacher key)
How Far a Coyote Roams, written for 7th grade (teacher key)
Cook County's Coyote Count, written for 8th grade (teacher key)
Watching City Coyotes, written for 9th grade (teacher key)
The City Coyote Study, written for 10th grade (teacher key)
Learning From City Coyotes, written for 11th grade (teacher key)
Coyote Neighbors, written for 12th grade and up (teacher key)

Day and Night

Why do we have day and night?

Why Is It Dark Now?, written for Pre-K and kindergarten (teacher key)
The Spinning Earth, written for 1st grade (teacher key)
A Day Is One Turn, written for 2nd grade (teacher key)
Sunrise, Sunset and Beyond, written for 3rd grade (teacher key)
Turning Toward the Light, written for 4th grade (teacher key)
Light, Dark and the Body Clock, written for 5th grade (teacher key)
The Clock Set by the Sun, written for 6th grade (teacher key)
The Ground Under You Is Turning, written for 7th grade (teacher key)
Days That Keep Getting Longer, written for 8th grade (teacher key)
Proof That Earth Turns, written for 9th grade (teacher key)
Where a Day Begins, written for 10th grade (teacher key)
Two Clocks, One Planet, written for 11th grade (teacher key)
Earth Is an Uneven Clock, written for 12th grade and up (teacher key)

Dinosaurs

When did dinosaurs live, and why did they die out?

Big and Small Dinos, written for Pre-K and kindergarten (teacher key)
Dinosaurs Big and Small, written for 1st grade (teacher key)
Giants, Horns and Feathers, written for 2nd grade (teacher key)
A Long Age of Dinosaurs, written for 3rd grade (teacher key)
Reading the Age of Dinosaurs, written for 4th grade (teacher key)
What Fossils Can and Cannot Tell Us, written for 5th grade (teacher key)
Naming the Dinosaurs, written for 6th grade (teacher key)
Clues in the Clay, written for 7th grade (teacher key)
Feathers Before Flight, written for 8th grade (teacher key)
Reading the Rocks, written for 9th grade (teacher key)
Weighing the Evidence, written for 10th grade (teacher key)
What We Still Do Not Know, written for 11th grade (teacher key)

Dogs

How did dogs become our pets?

Dogs Are Our Friends, written for Pre-K and kindergarten (teacher key)
How Dogs Joined Us, written for 1st grade (teacher key)
Dogs and Their People, written for 2nd grade (teacher key)
A Long Friendship, written for 3rd grade (teacher key)
From Wolf to Best Friend, written for 4th grade (teacher key)
Built to Sniff, Built to Cool, written for 5th grade (teacher key)
Ears, Noses and Old Wolves, written for 6th grade (teacher key)
The Animal We Cannot Date, written for 7th grade (teacher key)
Hunting for the First Dog, written for 8th grade (teacher key)
The Tamest Foxes and the First Dogs, written for 9th grade (teacher key)
Reading the Genes of Dogs, written for 10th grade (teacher key)
Why Dogs Still Surprise Scientists, written for 11th grade (teacher key)
Dogs and People: Working, Bonding, Breeding, written for 12th grade and up (teacher key)

Dragons and Mythical Creatures

Where did stories of dragons come from?

Big Lizard, written for Pre-K and kindergarten (teacher key)
Real Dragons, Told Dragons, written for 1st grade (teacher key)
Animals Behind Old Tales, written for 2nd grade (teacher key)
Dragons Told and Found, written for 3rd grade (teacher key)
Lizards Called Dragons, written for 4th grade (teacher key)
Real Animals Behind Monsters, written for 5th grade (teacher key)
Dragons East and West, written for 6th grade (teacher key)
Mythic Beasts and Real Ones, written for 7th grade (teacher key)
Dragons East and West, written for 8th grade (teacher key)
Bones, Tusks and Monsters, written for 9th grade (teacher key)
Testing Theories About Monsters, written for 10th grade (teacher key)
The Dragon Gets Its Fire, written for 11th grade (teacher key)
Testing the Monster Theories, written for 12th grade and up (teacher key)

Earthquakes

What causes earthquakes?

When the Earth Shakes, written for Pre-K and kindergarten (teacher key)
The Moving Ground, written for 1st grade (teacher key)
Rocks on the Move, written for 2nd grade (teacher key)
Shake, Rattle, and Ready, written for 3rd grade (teacher key)
Why the Ground Shakes, written for 4th grade (teacher key)
Ready Before It Shakes, written for 5th grade (teacher key)
Strain, Slip and Chance, written for 6th grade (teacher key)
Reading the Ground's Signal, written for 7th grade (teacher key)
Elastic Rebound and Waves, written for 8th grade (teacher key)
The Slip Beneath Us, written for 9th grade (teacher key)
Waves and Warnings, written for 10th grade (teacher key)
Mapping the Hidden Plate, written for 11th grade (teacher key)
The Odds Under Our Feet, written for 12th grade and up (teacher key)

Electric Eels

How does an electric eel make electricity?

An Eel That Is a Fish, written for Pre-K and kindergarten (teacher key)
Long Fish, Dark Water, written for 1st grade (teacher key)
The Fish That Is Not an Eel, written for 2nd grade (teacher key)
Swimming in Muddy Rivers, written for 3rd grade (teacher key)
A Fish Full of Batteries, written for 4th grade (teacher key)
Stacks of Tiny Batteries, written for 5th grade (teacher key)
Not Just One Kind, written for 6th grade (teacher key)
Counting Electric Eels, written for 7th grade (teacher key)
Eels That Hunt Together, written for 8th grade (teacher key)
Three Species, Three Homes, written for 9th grade (teacher key)
How an Electric Eel Works, written for 10th grade (teacher key)
What Scientists Still Argue About, written for 11th grade (teacher key)
The Electric Eel, Measured, written for 12th grade and up (teacher key)

Eurasian Eagle-Owls

How big is a Eurasian eagle-owl?

Look at the Eagle-Owl, written for Pre-K and kindergarten (teacher key)
A Big Owl with Orange Eyes, written for 1st grade (teacher key)
The Eagle-Owl at Night, written for 2nd grade (teacher key)
How Big Is an Eagle-Owl?, written for 3rd grade (teacher key)
Hunters of the Night Cliffs, written for 4th grade (teacher key)
Life on the Rocky Ledges, written for 5th grade (teacher key)
Ravines, Deserts and Towns, written for 6th grade (teacher key)
Reading the Owl Pellets, written for 7th grade (teacher key)
Superspecies of the Owls, written for 8th grade (teacher key)
Counting Territories, written for 9th grade (teacher key)
What Rabbits Do for Owls, written for 10th grade (teacher key)
Rabbits, Pellets and Recovery, written for 11th grade (teacher key)
Reading a Hidden Species, written for 12th grade and up (teacher key)

Factories

What happens inside a factory?

What a Factory Does, written for Pre-K and kindergarten (teacher key)
Inside a Factory, written for 1st grade (teacher key)
Step by Step, written for 2nd grade (teacher key)
From Workshops to Assembly Lines, written for 3rd grade (teacher key)
Mass Production, written for 4th grade (teacher key)
Parts That Fit Anywhere, written for 5th grade (teacher key)
Mill Girls and Machines, written for 6th grade (teacher key)
The Mill That Never Slept, written for 7th grade (teacher key)
Before Ford, written for 8th grade (teacher key)
Division of Labor, written for 9th grade (teacher key)
Three Minutes a Car, written for 10th grade (teacher key)
Counting Robots, written for 11th grade (teacher key)
Smart Factories and Supply Chains, written for 12th grade and up (teacher key)

The Fastest Animals

What is the fastest animal?

Fast, Fast, Fast, written for Pre-K and kindergarten (teacher key)
Who Is Fast?, written for 1st grade (teacher key)
Fast and Faster, written for 2nd grade (teacher key)
Built to Go Fast, written for 3rd grade (teacher key)
Fast Is Not One Thing, written for 4th grade (teacher key)
Records and Rumors, written for 5th grade (teacher key)
Strapped With Sensors, written for 6th grade (teacher key)
The 70 mph Question, written for 7th grade (teacher key)
What Frightful Proved, written for 8th grade (teacher key)
A Fish With a Speed Limit, written for 9th grade (teacher key)
How Fast Is Too Fast to Measure?, written for 10th grade (teacher key)
Back From the Brink, written for 11th grade (teacher key)
One Race, Many Rules, written for 12th grade and up (teacher key)

Feeling Good About Yourself

How can you feel good about yourself?

Good About You, written for Pre-K and kindergarten (teacher key)
Feeling Good Starts Here, written for 1st grade (teacher key)
Ways to Feel Good, written for 2nd grade (teacher key)
Kind to Yourself, written for 3rd grade (teacher key)
Small Ways to Feel Good, written for 4th grade (teacher key)
The Voice Inside Your Head, written for 5th grade (teacher key)
Good Enough Is Enough, written for 6th grade (teacher key)
Where Self-Esteem Comes From, written for 7th grade (teacher key)
What the Studies Found, written for 8th grade (teacher key)
Where Self-Esteem Comes From, written for 9th grade (teacher key)
The Voice in Your Head, written for 10th grade (teacher key)
What the Research Says About Confidence, written for 11th grade (teacher key)
The Evidence on Feeling Good, written for 12th grade and up (teacher key)

Feelings

What are feelings, and why do we have them?

Sad, Mad and Glad, written for Pre-K and kindergarten (teacher key)
Feelings Come and Go, written for 1st grade (teacher key)
Inside a Feeling, written for 2nd grade (teacher key)
Good or Bad?, written for 3rd grade (teacher key)
Why We Have Emotions, written for 4th grade (teacher key)
The Brain's Alarm, written for 5th grade (teacher key)
Thoughts Behind Feelings, written for 6th grade (teacher key)
What a Feeling Is Made Of, written for 7th grade (teacher key)
The Brain and the Body Alarm, written for 8th grade (teacher key)
Faster Than Thinking, written for 9th grade (teacher key)
Putting Emotions on Trial, written for 10th grade (teacher key)
Where Scientists Disagree and Test, written for 11th grade (teacher key)
Unsettled Questions About Emotion, written for 12th grade and up (teacher key)

Fossils

How do fossils form?

Fossils Under Our Feet, written for 1st grade (teacher key)
What Fossils Are Made Of, written for 2nd grade (teacher key)
Rocks That Remember, written for 3rd grade (teacher key)
How a Fossil Forms, written for 4th grade (teacher key)
Clues in the Rock, written for 5th grade (teacher key)
What the Rocks Kept, written for 6th grade (teacher key)
Buried Deep and Fast, written for 7th grade (teacher key)
Reading the Layers, written for 8th grade (teacher key)
Matching Rocks by Their Fossils, written for 9th grade (teacher key)
Tests, Estimates and Old Arguments, written for 10th grade (teacher key)

Friendship

How do friendships work?

Who Is My Pal?, written for Pre-K and kindergarten (teacher key)
Pals Like Pals, written for 1st grade (teacher key)
Who Plays With Whom, written for 2nd grade (teacher key)
Fifty Hours to a Casual Friend, written for 3rd grade (teacher key)
How Many Hours?, written for 4th grade (teacher key)
More Than Time, written for 5th grade (teacher key)
Circles of Friends, written for 6th grade (teacher key)
A Sticker for a Friend, written for 7th grade (teacher key)
How Scientists Spot a Friend, written for 8th grade (teacher key)
The Arithmetic of Friendship, written for 9th grade (teacher key)
Two Brains, One Movie, written for 10th grade (teacher key)
What Counts as a Friend, written for 11th grade (teacher key)
Layers of Friends, written for 12th grade and up (teacher key)

Gas and Electric Cars

How are gas cars and electric cars different inside?

Two Kinds of Cars, written for Pre-K and kindergarten (teacher key)
Inside the Car, written for 1st grade (teacher key)
Pistons and Plugs, written for 2nd grade (teacher key)
Four Strokes and a Spark, written for 3rd grade (teacher key)
Inside Two Kinds of Cars, written for 4th grade (teacher key)
Brakes, Exhaust and Idling, written for 5th grade (teacher key)
Gears and Power, written for 6th grade (teacher key)
Filling Up and Plugging In, written for 7th grade (teacher key)
Old Idea, New Parts, written for 8th grade (teacher key)
Compression, Differentials and Converters, written for 9th grade (teacher key)
Where the Energy Goes, written for 10th grade (teacher key)
Knock, Torque and Timing, written for 11th grade (teacher key)
The Engineering of Motion, written for 12th grade and up (teacher key)

Germs

What are germs, and how do they make us sick?

Little Things I Can Not See, written for Pre-K and kindergarten (teacher key)
Little Things, Big Job, written for 1st grade (teacher key)
The Tiny Troublemakers, written for 2nd grade (teacher key)
Hiding in Plain Sight, written for 3rd grade (teacher key)
Why Germs Make You Sick, written for 4th grade (teacher key)
The Invisible Army, written for 5th grade (teacher key)
A War You Cannot See, written for 6th grade (teacher key)
The Cloth Merchant's Lens, written for 7th grade (teacher key)
Breaking the Chain, written for 8th grade (teacher key)
Hunting the Invisible, written for 9th grade (teacher key)
The Crowd You Carry, written for 10th grade (teacher key)
Proof, Step by Step, written for 11th grade (teacher key)
Counting the Unseen, written for 12th grade and up (teacher key)

Ghosts

Are ghosts real?

The House Goes Creak, written for Pre-K and kindergarten (teacher key)
Who Made That Noise?, written for 1st grade (teacher key)
Faces in the Clouds, written for 2nd grade (teacher key)
Tricks of Light and Shadow, written for 3rd grade (teacher key)
The Ghost Made of Glass, written for 4th grade (teacher key)
Why the House Pops at Night, written for 5th grade (teacher key)
The Lab and the Fan, written for 6th grade (teacher key)
Creaks, Faces and Glass, written for 7th grade (teacher key)
Counting Spooky Stories, written for 8th grade (teacher key)
The Hum Below Hearing, written for 9th grade (teacher key)
Haunted Rooms Under Test, written for 10th grade (teacher key)
What We Expect to See, written for 11th grade (teacher key)
Where Spooky Feelings Come From, written for 12th grade and up (teacher key)

Giant Pacific Octopuses

How smart is a giant Pacific octopus?

The Big Octopus, written for Pre-K and kindergarten (teacher key)
Eight Arms in the Sea, written for 1st grade (teacher key)
Big Octopus, Small Hiding Places, written for 2nd grade (teacher key)
Eight Arms, Three Hearts, written for 3rd grade (teacher key)
An Octopus With Eight Clever Arms, written for 4th grade (teacher key)
Eight Arms, Clever Skin, written for 5th grade (teacher key)
Skin That Changes, written for 6th grade (teacher key)
How Big Can an Octopus Get?, written for 7th grade (teacher key)
Measuring a Clever Octopus, written for 8th grade (teacher key)
Smarter Than a Fish, written for 9th grade (teacher key)
Evidence for an Octopus Mind, written for 10th grade (teacher key)
One Brain and Eight Clever Arms, written for 11th grade (teacher key)
The Octopus Mind, Still Unsolved, written for 12th grade and up (teacher key)

Giant Squid

How big is a giant squid, and has anyone seen one alive?

Big Eyes in the Sea, written for Pre-K and kindergarten (teacher key)
A Squid in the Dark Sea, written for 1st grade (teacher key)
Home of the Giant Squid, written for 2nd grade (teacher key)
The Biggest Eyes, written for 3rd grade (teacher key)
Has Anyone Seen One Alive?, written for 4th grade (teacher key)
Squid of Three Sizes, written for 5th grade (teacher key)
Giant Squid, Up Close, written for 6th grade (teacher key)
How Big Is Big?, written for 7th grade (teacher key)
From Kraken to Camera, written for 8th grade (teacher key)
The Proof Problem, written for 9th grade (teacher key)
Eyes in the Dark, written for 10th grade (teacher key)
One Squid, One Ocean, written for 11th grade (teacher key)
What We Still Argue About, written for 12th grade and up (teacher key)

Golden Eagles

How does a golden eagle hunt?

Look at the Eagle, written for Pre-K and kindergarten (teacher key)
Gold on the Neck, written for 1st grade (teacher key)
Sharp Eyes, Fast Dive, written for 2nd grade (teacher key)
Three Ways to Hunt, written for 3rd grade (teacher key)
The Eagle of Open Country, written for 4th grade (teacher key)
Hunting From Above, written for 5th grade (teacher key)
Meet the Golden Eagle, written for 6th grade (teacher key)
Built to Soar, written for 7th grade (teacher key)
Golden Eagles Up Close, written for 8th grade (teacher key)
Following Wings, written for 9th grade (teacher key)
Reading the Wind, written for 10th grade (teacher key)
Counting Golden Eagles, written for 11th grade (teacher key)
Wings Over Wide Country, written for 12th grade and up (teacher key)

Gravity

What is gravity?

Down, Down, Down, written for Pre-K and kindergarten (teacher key)
What Pulls Us Down, written for 1st grade (teacher key)
Fall Fast, Weigh Less, written for 2nd grade (teacher key)
Galileo, Newton and the Falling Apple, written for 3rd grade (teacher key)
Gravity Reaches Into Space, written for 4th grade (teacher key)
Pulls, Curves and Ripples, written for 5th grade (teacher key)
How Fast Things Fall and Why Light Bends, written for 6th grade (teacher key)
The Law Behind Weight and Tides, written for 7th grade (teacher key)
Weighing the Earth, written for 8th grade (teacher key)
Testing Gravity, written for 9th grade (teacher key)
Gravity on Trial, written for 10th grade (teacher key)
Catching the Shake of Space, written for 11th grade (teacher key)
What Gravity Still Hides, written for 12th grade and up (teacher key)

Great Horned Owls

How does a great horned owl hunt in the dark?

Owl Eyes at Night, written for Pre-K and kindergarten (teacher key)
Up Late with the Owl, written for 1st grade (teacher key)
Big Eyes, Quiet Night, written for 2nd grade (teacher key)
The Owl with Horns, written for 3rd grade (teacher key)
Horns Made of Feathers, written for 4th grade (teacher key)
A Year with the Owl, written for 5th grade (teacher key)
Finding Food in the Dark, written for 6th grade (teacher key)
Measuring a Night Owl, written for 7th grade (teacher key)
Built for the Dark, written for 8th grade (teacher key)
What the Pellets Show, written for 9th grade (teacher key)
Silent Wings, Banded Owls, written for 10th grade (teacher key)
What the Evidence Can and Cannot Say, written for 11th grade (teacher key)
Reading an Owl's Record, written for 12th grade and up (teacher key)

Green Anacondas

How big can a green anaconda grow?

Big Green Snake, written for Pre-K and kindergarten (teacher key)
Look at the Anaconda, written for 1st grade (teacher key)
Anaconda in the Swamp, written for 2nd grade (teacher key)
The Heaviest Snake, written for 3rd grade (teacher key)
Life in Slow Water, written for 4th grade (teacher key)
Big Snake, Wet World, written for 5th grade (teacher key)
Sizing Up the Anaconda, written for 6th grade (teacher key)
Female Giants of the Amazon, written for 7th grade (teacher key)
Inside the Giant Snake, written for 8th grade (teacher key)
Measuring a Giant, written for 9th grade (teacher key)
Giants and Guesses, written for 10th grade (teacher key)
One Snake or Two?, written for 11th grade (teacher key)
How Big, How Many Kinds?, written for 12th grade and up (teacher key)

Grizzly Bears

What do grizzly bears eat, and how do they get through winter?

Look at the Big Bear, written for Pre-K and kindergarten (teacher key)
What Grizzlies Eat, written for 1st grade (teacher key)
Sniff, Dig, Eat, Sleep, written for 2nd grade (teacher key)
The Bear's Long Sleep, written for 3rd grade (teacher key)
Eat Big, Sleep Long, written for 4th grade (teacher key)
260 Kinds of Food, written for 5th grade (teacher key)
One Bear, Many Places, written for 6th grade (teacher key)
A Menu That Changes, written for 7th grade (teacher key)
Moths on the Mountain, written for 8th grade (teacher key)
Inside the Winter Den, written for 9th grade (teacher key)
Numbers From the Den, written for 10th grade (teacher key)
Written in a Bear's Hair, written for 11th grade (teacher key)
Open Questions About Grizzlies, written for 12th grade and up (teacher key)

Gyrfalcons

How does a gyrfalcon live in the far north?

Look at the Big Bird, written for Pre-K and kindergarten (teacher key)
A Falcon of the Far North, written for 1st grade (teacher key)
The Biggest Falcon, written for 2nd grade (teacher key)
Fast and Low, written for 3rd grade (teacher key)
Top Bird of the Arctic, written for 4th grade (teacher key)
Falco rusticolus, written for 5th grade (teacher key)
Largest of All Falcons, written for 6th grade (teacher key)
Eyes on the Hunt, written for 7th grade (teacher key)
Gyrkins and Kings, written for 8th grade (teacher key)
Cameras at the Cliff, written for 9th grade (teacher key)
What the Feathers Tell, written for 10th grade (teacher key)
Ranges and Routes, written for 11th grade (teacher key)
A Falcon Out on the Ice, written for 12th grade and up (teacher key)

Hammerhead Sharks

Why does a hammerhead shark have a head like a hammer?

A Shark With a Wide Head, written for Pre-K and kindergarten (teacher key)
Eyes at the Ends, written for 1st grade (teacher key)
Shaped Like a Hammer, written for 2nd grade (teacher key)
Seas of the Hammerhead, written for 3rd grade (teacher key)
The Hammer-Shaped Head, written for 4th grade (teacher key)
Reading the Water, written for 5th grade (teacher key)
Great and Scalloped, written for 6th grade (teacher key)
The Wide Head, written for 7th grade (teacher key)
Sensors Under the Snout, written for 8th grade (teacher key)
Two Eyes, One Picture, written for 9th grade (teacher key)
The Wide-Headed Shark, written for 10th grade (teacher key)
A Head With Many Theories, written for 11th grade (teacher key)
Following the Hammerhead, written for 12th grade and up (teacher key)

Harpy Eagles

How big are a harpy eagle's claws?

Big Claws Up High, written for Pre-K and kindergarten (teacher key)
Big Wings, Big Claws, written for 1st grade (teacher key)
Eagle of the Rain Forest, written for 2nd grade (teacher key)
How Big Are Its Claws?, written for 3rd grade (teacher key)
An Eagle of the Tall Trees, written for 4th grade (teacher key)
Claws, Wings and Tall Trees, written for 5th grade (teacher key)
Built for the Forest, written for 6th grade (teacher key)
Numbers From the Canopy, written for 7th grade (teacher key)
What the Reports Say, written for 8th grade (teacher key)
Wings Between the Trees, written for 9th grade (teacher key)
Reading the Evidence, written for 10th grade (teacher key)
Where Harpy Eagles Roam, written for 11th grade (teacher key)
Umbrella Over the Canopy, written for 12th grade and up (teacher key)

Healthy Eating

What does food do for your body?

Food for Your Body, written for Pre-K and kindergarten (teacher key)
What Food Does, written for 1st grade (teacher key)
Vitamins and Digestion, written for 2nd grade (teacher key)
Calcium, Iron and Vitamins, written for 3rd grade (teacher key)
How Food Becomes Nutrients, written for 4th grade (teacher key)
Vitamins, Minerals and Fibre, written for 5th grade (teacher key)
Protein, Minerals and Vitamins, written for 6th grade (teacher key)
Inside the Meal, written for 7th grade (teacher key)
Nutrients That Work Together, written for 8th grade (teacher key)
The Hunt for Vitamins, written for 9th grade (teacher key)
Piecing Together the Vitamins, written for 10th grade (teacher key)
The Machinery of a Meal, written for 11th grade (teacher key)
From First Bite to Blood, written for 12th grade and up (teacher key)

Hiccups, Sneezes and Yawns

Why do we hiccup, sneeze and yawn?

Hic, Puff, Yawn, written for Pre-K and kindergarten (teacher key)
Funny Things Bodies Do, written for 1st grade (teacher key)
Three Body Surprises, written for 2nd grade (teacher key)
Hic, Achoo, Ahh, written for 3rd grade (teacher key)
The 68-Year Hiccup, written for 4th grade (teacher key)
Reflexes and Mysteries, written for 5th grade (teacher key)
Three Theories of a Yawn, written for 6th grade (teacher key)
Hiccups, Sneezes and Yawns Inside You, written for 7th grade (teacher key)
What Sets Off a Hiccup, Sneeze or Yawn, written for 8th grade (teacher key)
Hiccups, Sneezes, Yawns: The Open Questions, written for 9th grade (teacher key)
Why a Yawn Spreads, written for 10th grade (teacher key)
Three Reflexes Side by Side, written for 11th grade (teacher key)
What Scientists Cannot Yet Explain, written for 12th grade and up (teacher key)

Honey Badgers

What makes a honey badger so tough?

The Digger With a Stripe, written for Pre-K and kindergarten (teacher key)
Meet the Honey Badger, written for 1st grade (teacher key)
Stripe, Claws and Honey, written for 2nd grade (teacher key)
A Digger With a Big Menu, written for 3rd grade (teacher key)
Built to Dig, written for 4th grade (teacher key)
A Nose for Dinner, written for 5th grade (teacher key)
Living Alone, Sharing Ground, written for 6th grade (teacher key)
Tunnels, Names and Tumbling, written for 7th grade (teacher key)
A Day in the Life of a Ratel, written for 8th grade (teacher key)
Stories Versus Evidence, written for 9th grade (teacher key)
Counting the Uncountable, written for 10th grade (teacher key)
Receptors, Rocks and Returns, written for 11th grade (teacher key)
An Early Branch of the Weasel Family, written for 12th grade and up (teacher key)

How Animals Sleep

Do animals sleep?

Do Animals Nap?, written for Pre-K and kindergarten (teacher key)
Who Takes a Nap?, written for 1st grade (teacher key)
Sleepers Big and Small, written for 2nd grade (teacher key)
Asleep in Strange Places, written for 3rd grade (teacher key)
Hanging, Standing, Floating, written for 4th grade (teacher key)
Half Awake, All the Time, written for 5th grade (teacher key)
Is It Really Asleep?, written for 6th grade (teacher key)
Sleeping on the Job, written for 7th grade (teacher key)
The Sleep Test, written for 8th grade (teacher key)
One Eye Open, written for 9th grade (teacher key)
The Price of Sleep, written for 10th grade (teacher key)
Can Sleep Be Cheated?, written for 11th grade (teacher key)
Where Sleep Came From, written for 12th grade and up (teacher key)

How Apps Work

How does an app work?

What Is an App?, written for Pre-K and kindergarten (teacher key)
All About Apps, written for 1st grade (teacher key)
Apps on a Phone, written for 2nd grade (teacher key)
Software in Your Pocket, written for 3rd grade (teacher key)
Apps, Updates and Parents, written for 4th grade (teacher key)
Inside Your Apps, written for 5th grade (teacher key)
How an App Works, written for 6th grade (teacher key)
The Chain Behind the Icon, written for 7th grade (teacher key)
What an App Is Made Of, written for 8th grade (teacher key)
What Happens When You Tap, written for 9th grade (teacher key)
Inside the App Sandbox, written for 10th grade (teacher key)
From Code to Your Pocket, written for 11th grade (teacher key)
Apps, Rules and Control, written for 12th grade and up (teacher key)

How Banks Work

What does a bank do with your money?

Where Money Goes, written for Pre-K and kindergarten (teacher key)
Inside a Bank, written for 1st grade (teacher key)
Your Money at the Bank, written for 2nd grade (teacher key)
The Bank's Big Pool of Money, written for 3rd grade (teacher key)
Inside a Bank, written for 4th grade (teacher key)
Banks, Savers and Borrowers, written for 5th grade (teacher key)
Where Savings Go, written for 6th grade (teacher key)
Between Savers and Borrowers, written for 7th grade (teacher key)
Banks Past and Present, written for 8th grade (teacher key)
Inside the Bank's Pool of Money, written for 9th grade (teacher key)
When Banks Closed Their Doors, written for 10th grade (teacher key)
Reserves, Runs and Rate Caps, written for 11th grade (teacher key)
The Business of Lending Money, written for 12th grade and up (teacher key)

How Buildings Stand Up

How do tall buildings stay up?

Up, Up, Up, written for Pre-K and kindergarten (teacher key)
Steel Skeletons, written for 1st grade (teacher key)
Built to Stand, written for 2nd grade (teacher key)
Skyscraper Secrets, written for 3rd grade (teacher key)
Why Towers Don't Topple, written for 4th grade (teacher key)
The Strong Bones of a Skyline, written for 5th grade (teacher key)
Tubes, Towers and Shaking Ground, written for 6th grade (teacher key)
Skeletons in the Sky, written for 7th grade (teacher key)
Fighting the Wind, written for 8th grade (teacher key)
Why the Tower Sways, written for 9th grade (teacher key)
Loads, Tubes and Bolts, written for 10th grade (teacher key)
The Hollow Tube Idea, written for 11th grade (teacher key)
The Margin of Safety, written for 12th grade and up (teacher key)

How Candy Is Made

How is candy made?

Sweet Start, written for Pre-K and kindergarten (teacher key)
Sugar and Beans, written for 1st grade (teacher key)
From Cane to Candy, written for 2nd grade (teacher key)
Candy Makers at Work, written for 3rd grade (teacher key)
The Candy Trail, written for 4th grade (teacher key)
Hot Sugar, Cool Candy, written for 5th grade (teacher key)
Inside the Candy Factory, written for 6th grade (teacher key)
Sweet Science in a Wrapper, written for 7th grade (teacher key)
The Chemistry Behind the Chew, written for 8th grade (teacher key)
Microbes, Crystals and Cocoa, written for 9th grade (teacher key)
Crystal Forms and Factory Floors, written for 10th grade (teacher key)
Shine, Snap and Crystal, written for 11th grade (teacher key)
Glass, Grit and Gloss, written for 12th grade and up (teacher key)

How Cars Are Made

How are cars made?

Car Start, written for Pre-K and kindergarten (teacher key)
Cars on the Line, written for 1st grade (teacher key)
Parts, Paint and a Moving Line, written for 2nd grade (teacher key)
Ford's Moving Line, written for 3rd grade (teacher key)
Who Built the First Line?, written for 4th grade (teacher key)
Colors, Clay and the Toyota Way, written for 5th grade (teacher key)
Marriage, Chips and Robots, written for 6th grade (teacher key)
The Line That Moved, written for 7th grade (teacher key)
Inside a Car Plant, written for 8th grade (teacher key)
Metal, Heat and Pressure, written for 9th grade (teacher key)
Lines, Cards and Castings, written for 10th grade (teacher key)
Engineering the Factory, written for 11th grade (teacher key)
What Historians Still Argue About, written for 12th grade and up (teacher key)

How Computers Work

How does a computer work?

Look at a Computer, written for Pre-K and kindergarten (teacher key)
Look Inside a Computer, written for 1st grade (teacher key)
Parts Inside a Computer, written for 2nd grade (teacher key)
Bits, Chips and Switches, written for 3rd grade (teacher key)
Fetch, Execute, Repeat, written for 4th grade (teacher key)
Numbers Behind the Screen, written for 5th grade (teacher key)
How a Computer Counts, written for 6th grade (teacher key)
Parts, Bits and Switches, written for 7th grade (teacher key)
Parts, Numbers and Pixels, written for 8th grade (teacher key)
The Program That Starts First, written for 9th grade (teacher key)
From Boole's Logic to the Transistor, written for 10th grade (teacher key)
Etching Switches on a Chip, written for 11th grade (teacher key)
Squeezing, Errors and Limits, written for 12th grade and up (teacher key)

How Laws Are Made

How does a law get made?

A Law Is Made, written for Pre-K and kindergarten (teacher key)
Idea to Law, written for 1st grade (teacher key)
Who Makes the Rules, written for 2nd grade (teacher key)
The Path of a Bill, written for 3rd grade (teacher key)
Three Branches, One Bill, written for 4th grade (teacher key)
From Idea to Law, written for 5th grade (teacher key)
The Road to a Law, written for 6th grade (teacher key)
Inside the Lawmaking Machine, written for 7th grade (teacher key)
Bills, Vetoes and Courts, written for 8th grade (teacher key)
The Long Road of a Bill, written for 9th grade (teacher key)
Who Has the Last Word, written for 10th grade (teacher key)
Same Idea, Different Machines, written for 11th grade (teacher key)
Compromise Written Into Law, written for 12th grade and up (teacher key)

How Plastic Toy Bricks Are Made

How are toy bricks made?

Snap! Click!, written for Pre-K and kindergarten (teacher key)
Bumps and Tubes, written for 1st grade (teacher key)
Inside the Brick Factory, written for 2nd grade (teacher key)
From Wood to Plastic, written for 3rd grade (teacher key)
The Plastic Behind the Snap, written for 4th grade (teacher key)
Bricks That Get Built Again, written for 5th grade (teacher key)
Brick by Brick, Plastic by Plastic, written for 6th grade (teacher key)
Studs, Tubes and Granules, written for 7th grade (teacher key)
The Brick That Clutches, written for 8th grade (teacher key)
A Brick, Reinvented, written for 9th grade (teacher key)
Rubber, Heat and Molds, written for 10th grade (teacher key)
Who Made the Brick?, written for 11th grade (teacher key)
Anatomy of a Standard Part, written for 12th grade and up (teacher key)

How Paper Is Made

How is paper made?

Tree Bits, written for Pre-K and kindergarten (teacher key)
Tree to Paper, written for 1st grade (teacher key)
From Logs to Paper, written for 2nd grade (teacher key)
Pulp, Size and Calenders, written for 3rd grade (teacher key)
The Mill Behind the Page, written for 4th grade (teacher key)
Glue Inside the Wood, written for 5th grade (teacher key)
Why Paper Has a Grain, written for 6th grade (teacher key)
Paper Without Glue, written for 7th grade (teacher key)
From Rags to Wood, written for 8th grade (teacher key)
The Strength Accident, written for 9th grade (teacher key)
Reinforced Concrete Made of Wood, written for 10th grade (teacher key)
Ninety-Nine Percent Water, written for 11th grade (teacher key)
Bonds, Boilers and a Disputed Inventor, written for 12th grade and up (teacher key)

How Pencils Are Made

How do they get the lead into a pencil?

Black Bits, written for Pre-K and kindergarten (teacher key)
What Is in a Pencil?, written for 1st grade (teacher key)
The Pencil Sandwich, written for 2nd grade (teacher key)
Black Lead That Is Not Lead, written for 3rd grade (teacher key)
The Pencil Sandwich Story, written for 4th grade (teacher key)
One Line, Seven Hundred Miles, written for 5th grade (teacher key)
Why a Pencil Writes, written for 6th grade (teacher key)
The Sandwich Method, written for 7th grade (teacher key)
Where Graphite Comes From, written for 8th grade (teacher key)
Who Invented the Pencil?, written for 9th grade (teacher key)
The Supply Chain in Your Pencil Case, written for 10th grade (teacher key)
Yellow, Lead and Little Tails, written for 11th grade (teacher key)
Carbon, Cedar and a Global Market, written for 12th grade and up (teacher key)

How Plants Grow

How does a seed become a plant?

A Plant in a Seed, written for Pre-K and kindergarten (teacher key)
Little Seed, Big Plant, written for 1st grade (teacher key)
Inside a Seed, written for 2nd grade (teacher key)
From Seed to Sunlight, written for 3rd grade (teacher key)
How a Seed Wakes Up, written for 4th grade (teacher key)
The Journey of a Seed, written for 5th grade (teacher key)
Wake-Up Call for a Seed, written for 6th grade (teacher key)
Roots, Water and Waiting, written for 7th grade (teacher key)
Finding Out How Plants Eat, written for 8th grade (teacher key)
What Is a Plant Made Of?, written for 9th grade (teacher key)
Signals, Sugar and Water, written for 10th grade (teacher key)
The Economy of a Plant, written for 11th grade (teacher key)
Evidence for How Plants Grow, written for 12th grade and up (teacher key)

The Internet

How does the internet work?

Computers That Talk, written for Pre-K and kindergarten (teacher key)
How a Page Gets to You, written for 1st grade (teacher key)
Opening a Website, written for 2nd grade (teacher key)
The Page That Came Back, written for 3rd grade (teacher key)
Following a Request Home, written for 4th grade (teacher key)
The Rules of the Road, written for 5th grade (teacher key)
Who Built the Internet, written for 6th grade (teacher key)
From Your Phone to the Sea Floor, written for 7th grade (teacher key)
One Hop at a Time, written for 8th grade (teacher key)
Names, Handshakes and Trade-offs, written for 9th grade (teacher key)
Layers, Routes and Long Waits, written for 10th grade (teacher key)
The Speed of Light in Glass, written for 11th grade (teacher key)
No Organization Can Force a Standard, written for 12th grade and up (teacher key)

How Coding Works

How do people write code?

Steps for a Computer, written for Pre-K and kindergarten (teacher key)
Tell the Computer What to Do, written for 1st grade (teacher key)
Writing Code, Step by Step, written for 2nd grade (teacher key)
Programmers at Work, written for 3rd grade (teacher key)
Variables, Loops and Bugs, written for 4th grade (teacher key)
Instructions for a Computer, written for 5th grade (teacher key)
From Zeros and Ones to Code, written for 6th grade (teacher key)
A Short History of Code, written for 7th grade (teacher key)
Making Machines Understand, written for 8th grade (teacher key)
Instructions a Machine Can Follow, written for 9th grade (teacher key)
Code From Binary to Python, written for 10th grade (teacher key)
From Binary to Open Source, written for 11th grade (teacher key)
Writing Code: A Field Guide, written for 12th grade and up (teacher key)

How Video Games Are Made

How are video games made?

Making a Game, written for Pre-K and kindergarten (teacher key)
The Game Team, written for 1st grade (teacher key)
Who Builds a Video Game, written for 2nd grade (teacher key)
Idea to Game, written for 3rd grade (teacher key)
Inside a Game Studio, written for 4th grade (teacher key)
Meet the Game Team, written for 5th grade (teacher key)
From Pong to Nintendo, written for 6th grade (teacher key)
Build a Game Step by Step, written for 7th grade (teacher key)
Testing, Tuning and Hits, written for 8th grade (teacher key)
How a Game Gets Built, written for 9th grade (teacher key)
Making a Game, Step by Step, written for 10th grade (teacher key)
Behind the Game Credits, written for 11th grade (teacher key)
Inside the Game Studio, written for 12th grade and up (teacher key)

How Video Sites Pick Your Videos

How does YouTube know what to show me?

What Shows Up Next, written for Pre-K and kindergarten (teacher key)
Who Picks the Next Video, written for 1st grade (teacher key)
The Video Picker, written for 2nd grade (teacher key)
Why That Video Showed Up, written for 3rd grade (teacher key)
What the Next Video Knows, written for 4th grade (teacher key)
Why These Videos Showed Up, written for 5th grade (teacher key)
What Your Watching Teaches the App, written for 6th grade (teacher key)
What YouTube Said About Its Picks, written for 7th grade (teacher key)
Inside a Recommendation Machine, written for 8th grade (teacher key)
What the Feed Learns From You, written for 9th grade (teacher key)
Predicting What You Will Watch, written for 10th grade (teacher key)
Two Stages, Billions of Videos, written for 11th grade (teacher key)
Signals, Bubbles and the Stop Button, written for 12th grade and up (teacher key)

How You Grow

How do kids grow?

Get Big, written for Pre-K and kindergarten (teacher key)
Bones That Get Longer, written for 1st grade (teacher key)
Inside Your Growing Bones, written for 2nd grade (teacher key)
Growing Takes Fuel, written for 3rd grade (teacher key)
The Living Bones Inside You, written for 4th grade (teacher key)
A Bone Bank for Life, written for 5th grade (teacher key)
Growth Myths Busted, written for 6th grade (teacher key)
Where a Bone Gets Longer, written for 7th grade (teacher key)
The Night Shift in Your Bones, written for 8th grade (teacher key)
Many Genes, One Height, written for 9th grade (teacher key)
Clues to Adult Height, written for 10th grade (teacher key)
A Century of Measuring Growth, written for 11th grade (teacher key)
What Sets Adult Size, written for 12th grade and up (teacher key)

Hurricanes and Tornadoes

What is the difference between a hurricane and a tornado?

Hurricane or Tornado?, written for 2nd grade (teacher key)
Wind That Spins, written for 3rd grade (teacher key)
Two Kinds of Spin, written for 4th grade (teacher key)
Reading the Sky, written for 5th grade (teacher key)
Scales of Wind, written for 6th grade (teacher key)
Warm Water and Rising Air, written for 7th grade (teacher key)
How Storms Spin, written for 8th grade (teacher key)
Reading the Storm, written for 9th grade (teacher key)
How Storms Are Studied, written for 10th grade (teacher key)
Storms, Tools and Open Questions, written for 11th grade (teacher key)
The Long Watch, written for 12th grade and up (teacher key)

Jaguars

How is a jaguar different from a leopard?

A Big Spotted Cat, written for Pre-K and kindergarten (teacher key)
Where the Jaguar Lives, written for 1st grade (teacher key)
Look Inside the Spots, written for 2nd grade (teacher key)
How to Know a Jaguar, written for 3rd grade (teacher key)
Cat of the Americas, written for 4th grade (teacher key)
Built Heavy, Living Alone, written for 5th grade (teacher key)
A Cat That Keeps Balance, written for 6th grade (teacher key)
Reading a Rosette, written for 7th grade (teacher key)
The Jaguar Corridor, written for 8th grade (teacher key)
Counting by Camera, written for 9th grade (teacher key)
A Jaguar Genome, written for 10th grade (teacher key)
Pantanal Giants, written for 11th grade (teacher key)
What a Skull Can Tell, written for 12th grade and up (teacher key)

Japan

What is Japan like?

Fuji and Rice, written for Pre-K and kindergarten (teacher key)
Four Big Islands, written for 1st grade (teacher key)
A Day in Japan, written for 2nd grade (teacher key)
Islands, Snow and Noodles, written for 3rd grade (teacher key)
Shoes Off at the Door, written for 4th grade (teacher key)
Emoji, Edo and Snow, written for 5th grade (teacher key)
Volcanoes, Typhoons and a Treaty, written for 6th grade (teacher key)
Plates, Waves and Blossom Forecasts, written for 7th grade (teacher key)
The Cherry Blossom Front, written for 8th grade (teacher key)
Vending Machines and Centenarians, written for 9th grade (teacher key)
Built to Sway, written for 10th grade (teacher key)
Rooms, Rings and Screens, written for 11th grade (teacher key)
Counting an Archipelago, written for 12th grade and up (teacher key)

Jobs and Careers

What do you want to be when you grow up?

When I Grow Up, written for Pre-K and kindergarten (teacher key)
Who Does What, written for 1st grade (teacher key)
Jobs All Around, written for 2nd grade (teacher key)
Hundreds of Ways to Work, written for 3rd grade (teacher key)
Hundreds of Ways to Work, written for 4th grade (teacher key)
Sorting Out the Job World, written for 5th grade (teacher key)
Groups, Licenses and Paths, written for 6th grade (teacher key)
Reading the Job Numbers, written for 7th grade (teacher key)
The Big Picture of Work, written for 8th grade (teacher key)
A Map of 867 Occupations, written for 9th grade (teacher key)
Where New Work Comes From, written for 10th grade (teacher key)
Automation and the Next Job, written for 11th grade (teacher key)
How the Job Numbers Are Made, written for 12th grade and up (teacher key)

Kindness

Why does being kind matter?

Who Helps?, written for Pre-K and kindergarten (teacher key)
Helping Hands and Paws, written for 1st grade (teacher key)
Who Lends a Hand?, written for 2nd grade (teacher key)
Tests of Helping, written for 3rd grade (teacher key)
The Helping Experiments, written for 4th grade (teacher key)
Doors, Dogs and Dropped Pegs, written for 5th grade (teacher key)
Helpers in the Wild and the Lab, written for 6th grade (teacher key)
What Kindness Is, and Who Shows It, written for 7th grade (teacher key)
Testing Kindness, written for 8th grade (teacher key)
Measuring Empathy, written for 9th grade (teacher key)
Why Help at All?, written for 10th grade (teacher key)
Minds, Brains and Giving, written for 11th grade (teacher key)
The Science of Kindness, written for 12th grade and up (teacher key)

King Cobras

How does a king cobra live, and what does it eat?

Meet the Cobra Who Eats Snakes, written for Pre-K and kindergarten (teacher key)
The Snake That Eats Snakes, written for 1st grade (teacher key)
A Snake With a Hood, written for 2nd grade (teacher key)
Snake-Eater of Asia, written for 3rd grade (teacher key)
The Largest Venomous Snake, written for 4th grade (teacher key)
A Snake That Stands Tall, written for 5th grade (teacher key)
A Hunter With One Favorite Food, written for 6th grade (teacher key)
Nest Builder of the Bamboo Thicket, written for 7th grade (teacher key)
Not a True Cobra, written for 8th grade (teacher key)
Following the Snakes Through Thailand, written for 9th grade (teacher key)
Venom, Genes and a Limbless Body, written for 10th grade (teacher key)
One Snake, Four Species, written for 11th grade (teacher key)
A Habitat on the Move, written for 12th grade and up (teacher key)

Komodo Dragons

How big is a Komodo dragon, and how does it hunt?

Meet the Komodo, written for Pre-K and kindergarten (teacher key)
The Biggest Lizard, written for 1st grade (teacher key)
The Biggest Lizard, written for 2nd grade (teacher key)
Life of a Komodo Dragon, written for 3rd grade (teacher key)
Smell, Wait and Venom, written for 4th grade (teacher key)
Tasting the Air, written for 5th grade (teacher key)
A Lizard on the Islands, written for 6th grade (teacher key)
Built to Smell and Wait, written for 7th grade (teacher key)
How Many Dragons Are Left?, written for 8th grade (teacher key)
Venom, Teeth and Lone Mothers, written for 9th grade (teacher key)
Reading a Dragon: Skull, Teeth and Genes, written for 10th grade (teacher key)
What Teeth and Genes Reveal, written for 11th grade (teacher key)
The Future of an Island Lizard, written for 12th grade and up (teacher key)

LeBron James

Who is LeBron James?

Meet LeBron James, written for Pre-K and kindergarten (teacher key)
LeBron James, written for 1st grade (teacher key)
LeBron James, King of the Court, written for 2nd grade (teacher key)
LeBron James: From Akron to the Record Books, written for 3rd grade (teacher key)
LeBron James: Titles, Teams and Records, written for 4th grade (teacher key)
LeBron James: Records, Rings and Gold, written for 5th grade (teacher key)
Who Is LeBron James?, written for 6th grade (teacher key)
From Akron to the Record Books, written for 7th grade (teacher key)
Records Along the Way, written for 8th grade (teacher key)
Longer Than Anyone, written for 9th grade (teacher key)
The Long Career of LeBron James, written for 10th grade (teacher key)

Leonardo da Vinci

Who was Leonardo da Vinci?

Leonardo Draws, written for Pre-K and kindergarten (teacher key)
Leonardo of Vinci, written for 1st grade (teacher key)
Born in Vinci, written for 2nd grade (teacher key)
Leonardo Looks and Learns, written for 3rd grade (teacher key)
What Leonardo Made, written for 4th grade (teacher key)
Wings on Paper, written for 5th grade (teacher key)
From Vinci to Amboise, written for 6th grade (teacher key)
An Engineer at Court, written for 7th grade (teacher key)
Drawings, Devices and Wings, written for 8th grade (teacher key)
So Many Interests, written for 9th grade (teacher key)
Pages That Survived, written for 10th grade (teacher key)
Puzzles in the Pages, written for 11th grade (teacher key)
Reading Leonardo Closely, written for 12th grade and up (teacher key)

Leopard Seals

How does a leopard seal live in Antarctica?

A Leopard Seal on Ice, written for Pre-K and kindergarten (teacher key)
Spots on the Pack Ice, written for 1st grade (teacher key)
Life Below the Pack Ice, written for 2nd grade (teacher key)
By the Numbers on the Ice, written for 3rd grade (teacher key)
A Leopard Seal's Life, written for 4th grade (teacher key)
Tagged and Tracked, written for 5th grade (teacher key)
Deep Dives, Long Trips, written for 6th grade (teacher key)
Life Around the Ice, written for 7th grade (teacher key)
Spots, Seasons and Islands, written for 8th grade (teacher key)
Counting Leopard Seals, written for 9th grade (teacher key)
Songs Under the Ice, written for 10th grade (teacher key)
Grip, Tear and Strain, written for 11th grade (teacher key)
What We Do Not Yet Know, written for 12th grade and up (teacher key)

Leopards

Why do leopards climb trees?

Spots in the Tree, written for Pre-K and kindergarten (teacher key)
Up the Tree at Night, written for 1st grade (teacher key)
Spots, Tail and Tree, written for 2nd grade (teacher key)
Spots, Speed and Trees, written for 3rd grade (teacher key)
Night Work of a Leopard, written for 4th grade (teacher key)
The Widest-Ranging Big Cat, written for 5th grade (teacher key)
Where the Leopard Roams, written for 6th grade (teacher key)
Built for the Branches, written for 7th grade (teacher key)
Eyes, Ears and a Long Tail, written for 8th grade (teacher key)
Sharp Senses and High Branches, written for 9th grade (teacher key)
What the Field Studies Found, written for 10th grade (teacher key)
Origins, Trees and Ranges, written for 11th grade (teacher key)
The Leopard Question, written for 12th grade and up (teacher key)

Lionel Messi

Who is Lionel Messi?

Meet Messi, written for Pre-K and kindergarten (teacher key)
Leo Plays Soccer, written for 1st grade (teacher key)
Prizes for Leo, written for 2nd grade (teacher key)
The Road to Barcelona, written for 3rd grade (teacher key)
Messi by the Numbers, written for 4th grade (teacher key)
The Final Against France, written for 5th grade (teacher key)
Extra Time, written for 6th grade (teacher key)
Tagging Along, written for 7th grade (teacher key)
Records and a Shootout, written for 8th grade (teacher key)
Copa America and Miami, written for 9th grade (teacher key)
Eight Ballons d'Or, written for 10th grade (teacher key)
Clubs and Country, written for 11th grade (teacher key)
Boyhood to World Cups, written for 12th grade and up (teacher key)

Lions

How do lions live together?

Meet the Lion, written for Pre-K and kindergarten (teacher key)
Lions Live in Prides, written for 1st grade (teacher key)
Lions Live in Prides, written for 2nd grade (teacher key)
How Lions Live Together, written for 3rd grade (teacher key)
Inside a Lion Pride, written for 4th grade (teacher key)
Lives of the Lions, written for 5th grade (teacher key)
Life in the Pride, written for 6th grade (teacher key)
The Lion's Place in the World, written for 7th grade (teacher key)
Brothers, Mothers and Rivals, written for 8th grade (teacher key)
Reading the Signals, written for 9th grade (teacher key)
Lions Together, written for 10th grade (teacher key)
Counting Africa's Lions, written for 11th grade (teacher key)
Lions on a Shrinking Map, written for 12th grade and up (teacher key)

Magnets

How do magnets work?

Pull and Push, written for Pre-K and kindergarten (teacher key)
Pull, Push, Point, written for 1st grade (teacher key)
Two Poles and a Shield, written for 2nd grade (teacher key)
What Makes a Magnet Pull, written for 3rd grade (teacher key)
The Long Reach of Magnets, written for 4th grade (teacher key)
Pulling Without Touching, written for 5th grade (teacher key)
Electricity and the Magnet, written for 6th grade (teacher key)
Fields, Currents and Floating Trains, written for 7th grade (teacher key)
Needles, Charts and Currents, written for 8th grade (teacher key)
Why Iron Remembers, written for 9th grade (teacher key)
When the Poles Swap, written for 10th grade (teacher key)
The Dynamo Under Our Feet, written for 11th grade (teacher key)
Reading Earth by Its Magnetism, written for 12th grade and up (teacher key)

Making Friends

How do you make a friend?

Hello, Friend, written for Pre-K and kindergarten (teacher key)
Say Hello First, written for 1st grade (teacher key)
Ways to Find a Friend, written for 2nd grade (teacher key)
Friendship Takes Practice, written for 3rd grade (teacher key)
Finding a Friend, written for 4th grade (teacher key)
Why People Need People, written for 5th grade (teacher key)
Friends Worth Having, written for 6th grade (teacher key)
Fifty Hours Together, written for 7th grade (teacher key)
The Give-and-Take Habit, written for 8th grade (teacher key)
The Hours Behind a Friendship, written for 9th grade (teacher key)
Why We Underestimate Each Other, written for 10th grade (teacher key)
How Connection Reaches the Body, written for 11th grade (teacher key)
The Evidence on Friendship, written for 12th grade and up (teacher key)

Mako Sharks

How fast can a mako shark swim?

Shark in the Sea, written for Pre-K and kindergarten (teacher key)
The Fast Blue Shark, written for 1st grade (teacher key)
Big Blue Mako, written for 2nd grade (teacher key)
From Pup to Old Shark, written for 3rd grade (teacher key)
How Fast Is a Mako?, written for 4th grade (teacher key)
Putting Tags on the Fast Shark, written for 5th grade (teacher key)
Following the Makos, written for 6th grade (teacher key)
A Warm Body, Sharp Senses, written for 7th grade (teacher key)
A Mako Grows Up, written for 8th grade (teacher key)
The Price of a Warm Body, written for 9th grade (teacher key)
Wanderer or Neighbour?, written for 10th grade (teacher key)
Measuring the Fastest Shark, written for 11th grade (teacher key)
Counting the Mako, written for 12th grade and up (teacher key)

Mark Rober

Who is Mark Rober?

Meet Mark, written for Pre-K and kindergarten (teacher key)
A Builder With Big Ideas, written for 1st grade (teacher key)
Squirrels, Jell-O and Mars, written for 2nd grade (teacher key)
Hiding the Science, written for 3rd grade (teacher key)
Costumes, Rovers and Kits, written for 4th grade (teacher key)
Science in Disguise, written for 5th grade (teacher key)
Rovers, Wikis and Phones, written for 6th grade (teacher key)
From JPL to Full-Time Videos, written for 7th grade (teacher key)
Dartboards and Mars, written for 8th grade (teacher key)
Twenty-Five Tries, written for 9th grade (teacher key)
A Gift for Making Science Fun, written for 10th grade (teacher key)
The Inspiration Shortage, written for 11th grade (teacher key)
Disneyland for Engineers, written for 12th grade and up (teacher key)

Mars

Could people live on Mars?

The Red Planet, written for 1st grade (teacher key)
Mars, the Red Planet, written for 2nd grade (teacher key)
Visiting the Red Planet, written for 3rd grade (teacher key)
A Cold Red Desert, written for 4th grade (teacher key)
Mars Up Close, written for 5th grade (teacher key)
Our Red Neighbor, written for 6th grade (teacher key)
The Cold Desert Planet, written for 7th grade (teacher key)
Listening to a Planet, written for 8th grade (teacher key)
Canals, Cracks and Lakebeds, written for 9th grade (teacher key)
Spots on a Rock, written for 10th grade (teacher key)
What Mars Has Not Told Us, written for 11th grade (teacher key)

Michael Jordan

Who is Michael Jordan?

Number 23, written for Pre-K and kindergarten (teacher key)
A Ball Player's Story, written for 1st grade (teacher key)
Big Facts About Number 23, written for 2nd grade (teacher key)
From College to Champion, written for 3rd grade (teacher key)
Six Titles for Chicago, written for 4th grade (teacher key)
The Shot, the Team, the Number, written for 5th grade (teacher key)
Chicago's Number 23, written for 6th grade (teacher key)
From Brooklyn to the Hall, written for 7th grade (teacher key)
Records and Big Nights, written for 8th grade (teacher key)
Three in a Row, written for 9th grade (teacher key)
The Second Three, written for 10th grade (teacher key)
Beyond the Titles, written for 11th grade (teacher key)
Two Runs, Six Titles, written for 12th grade and up (teacher key)

Mixing and Reactions

What happens when you mix things?

Mix It Up, written for Pre-K and kindergarten (teacher key)
Clues in a Cup, written for 1st grade (teacher key)
Kitchen Chemists, written for 2nd grade (teacher key)
Something New Is Made, written for 3rd grade (teacher key)
When Mixing Becomes a Reaction, written for 4th grade (teacher key)
Acids, Bases and the Fizz, written for 5th grade (teacher key)
Same Stuff or New Stuff, written for 6th grade (teacher key)
What Makes a Reaction Hurry, written for 7th grade (teacher key)
Saturated and Supersaturated, written for 8th grade (teacher key)
What Makes Something an Acid, written for 9th grade (teacher key)
Weighing the Air, written for 10th grade (teacher key)
Why Some Things Will Not Mix, written for 11th grade (teacher key)
Hints, Proof and Revolutions, written for 12th grade and up (teacher key)

Money

What is money, and where did it come from?

Money, Money, Money, written for Pre-K and kindergarten (teacher key)
Money Is for Buying, written for 1st grade (teacher key)
Shells, Stones and Coins, written for 2nd grade (teacher key)
Trading Without Money, written for 3rd grade (teacher key)
How Money Works, written for 4th grade (teacher key)
Money on the Move, written for 5th grade (teacher key)
Stone Money and Paper Promises, written for 6th grade (teacher key)
What Makes Money Work, written for 7th grade (teacher key)
Trust in the Stamp, written for 8th grade (teacher key)
Money Runs on Confidence, written for 9th grade (teacher key)
Engraved to Be Trusted, written for 10th grade (teacher key)
Who Looks After Money, written for 11th grade (teacher key)
A Brief History of Trust, written for 12th grade and up (teacher key)

Moray Eels

How does a moray eel live in the reef?

Meet the Moray, written for Pre-K and kindergarten (teacher key)
A Moray in a Crack, written for 1st grade (teacher key)
Meet the Moray Eel, written for 2nd grade (teacher key)
Hiding in the Reef, written for 3rd grade (teacher key)
Morays of Many Sizes, written for 4th grade (teacher key)
Cleaners and Crevices, written for 5th grade (teacher key)
Teeth, Jaws and Shrimp, written for 6th grade (teacher key)
A Moray on the Reef, written for 7th grade (teacher key)
The Moray Eel Close Up, written for 8th grade (teacher key)
Inside the Moray's World, written for 9th grade (teacher key)
How Scientists Study Morays, written for 10th grade (teacher key)
A Closer Look at Morays, written for 11th grade (teacher key)
Moray Eels in Focus, written for 12th grade and up (teacher key)

Music and Instruments

How do instruments make sound?

Shake and Hum, written for Pre-K and kindergarten (teacher key)
Sounds That Shake, written for 1st grade (teacher key)
How Music Starts, written for 2nd grade (teacher key)
Four Families, written for 3rd grade (teacher key)
Why Things Hum, written for 4th grade (teacher key)
From Strings to Brass, written for 5th grade (teacher key)
The Shake Behind the Song, written for 6th grade (teacher key)
How Instruments Sing, written for 7th grade (teacher key)
Strings, Tubes and Skins, written for 8th grade (teacher key)
What Makes It Ring, written for 9th grade (teacher key)
Standing Waves and Strings, written for 10th grade (teacher key)
The Mathematics of a Note, written for 11th grade (teacher key)
Anatomy of an Instrument, written for 12th grade and up (teacher key)

Natural Disasters

What causes earthquakes, hurricanes, tornadoes and floods?

A Plan for Big Weather, written for Pre-K and kindergarten (teacher key)
Shake, Spin, Flood, written for 1st grade (teacher key)
Warnings That Help, written for 2nd grade (teacher key)
Know the Warning Words, written for 3rd grade (teacher key)
Rating Earth's Big Events, written for 4th grade (teacher key)
Water on the Move, written for 5th grade (teacher key)
Storms, Scales and Alerts, written for 6th grade (teacher key)
Spin, Slip and Surge, written for 7th grade (teacher key)
One Number, Many Effects, written for 8th grade (teacher key)
Gaps in the Record, written for 9th grade (teacher key)
Radar, Buoys and Models, written for 10th grade (teacher key)
Reading the Signs, written for 11th grade (teacher key)
The Edge of Forecasting, written for 12th grade and up (teacher key)

Nile Crocodiles

How do Nile crocodiles live in Africa's rivers?

Look at the Crocodile, written for Pre-K and kindergarten (teacher key)
A Crocodile in the River, written for 1st grade (teacher key)
Eggs by the River, written for 2nd grade (teacher key)
River Giants of Africa, written for 3rd grade (teacher key)
Crocodiles of the Nile, written for 4th grade (teacher key)
Warm Sun, Cool Water, written for 5th grade (teacher key)
Built for Sun and Water, written for 6th grade (teacher key)
A Hunter of the River Banks, written for 7th grade (teacher key)
Two Kinds of Nile Crocodile, written for 8th grade (teacher key)
Built for the River, written for 9th grade (teacher key)
The Nile Crocodile's World, written for 10th grade (teacher key)
What Researchers Measured, written for 11th grade (teacher key)
Life of the Nile Crocodile, written for 12th grade and up (teacher key)

Northern Goshawks

How does a goshawk fly through the forest?

Red Eyes in the Woods, written for Pre-K and kindergarten (teacher key)
A Hawk in the Trees, written for 1st grade (teacher key)
The Forest Hawk, written for 2nd grade (teacher key)
Weaving Through the Trees, written for 3rd grade (teacher key)
Built for the Forest, written for 4th grade (teacher key)
The Goose-Hawk, written for 5th grade (teacher key)
Wingbeats Among the Trunks, written for 6th grade (teacher key)
Ambush From a Tree Perch, written for 7th grade (teacher key)
Folding Wings in Tight Spaces, written for 8th grade (teacher key)
How Fast, How Far, How Sharp, written for 9th grade (teacher key)
Chases, Miles and Territories, written for 10th grade (teacher key)
Counting a Secretive Bird, written for 11th grade (teacher key)
What the Forest Gives a Hawk, written for 12th grade and up (teacher key)

Staying Safe Online

How do you stay safe online?

Ask a Grown-Up First, written for Pre-K and kindergarten (teacher key)
Smart and Kind Online, written for 1st grade (teacher key)
Think Before You Click, written for 2nd grade (teacher key)
Spot the Scam, written for 3rd grade (teacher key)
Your Digital Footprint, written for 4th grade (teacher key)
Real or Fake Online, written for 5th grade (teacher key)
Locks for Your Accounts, written for 6th grade (teacher key)
How Scammers Think, written for 7th grade (teacher key)
Your Data and Who Wants It, written for 8th grade (teacher key)
Passwords Have Changed, written for 9th grade (teacher key)
Privacy in a Tracked World, written for 10th grade (teacher key)
Judging What You Read Online, written for 11th grade (teacher key)
What Holds Up Online, written for 12th grade and up (teacher key)

Orcas

How do orcas hunt together?

Meet the Orca, written for Pre-K and kindergarten (teacher key)
Orcas Live in Pods, written for 1st grade (teacher key)
The Biggest Dolphin, written for 2nd grade (teacher key)
A Dolphin by Another Name, written for 3rd grade (teacher key)
Orcas and Their Pods, written for 4th grade (teacher key)
A Dolphin Called a Killer Whale, written for 5th grade (teacher key)
Inside the Orca Family, written for 6th grade (teacher key)
A Dolphin Built for the Whole Ocean, written for 7th grade (teacher key)
Hearing the Ocean, Hunting as a Team, written for 8th grade (teacher key)
Orcas Across the Oceans, written for 9th grade (teacher key)
Two Ways to Hunt in the Sea, written for 10th grade (teacher key)
One Orca or Many?, written for 11th grade (teacher key)
What We Still Do Not Know About Orcas, written for 12th grade and up (teacher key)

Ospreys

How does an osprey catch fish?

Look at the Osprey, written for Pre-K and kindergarten (teacher key)
The Bird That Dives for Fish, written for 1st grade (teacher key)
Fish Hawk of the Water, written for 2nd grade (teacher key)
Built to Fish, written for 3rd grade (teacher key)
Hovering Over the Water, written for 4th grade (teacher key)
A Bird Built for Diving, written for 5th grade (teacher key)
From Dive to Nest, written for 6th grade (teacher key)
The Fish Hawk's Toolkit, written for 7th grade (teacher key)
How an Osprey Fishes, written for 8th grade (teacher key)
The Fish Hawk Up Close, written for 9th grade (teacher key)
The Fish Hawk's Dive, written for 10th grade (teacher key)
Following Ospreys by Satellite, written for 11th grade (teacher key)
Ospreys, Genes and Satellites, written for 12th grade and up (teacher key)

Giant Pandas

What do pandas eat?

Black and White Bear, written for Pre-K and kindergarten (teacher key)
A Panda's Day, written for 1st grade (teacher key)
Panda Facts and Feats, written for 2nd grade (teacher key)
Meet the Giant Panda, written for 3rd grade (teacher key)
A Giant Panda's Life, written for 4th grade (teacher key)
A Bamboo-Eating Bear, written for 5th grade (teacher key)
Bamboo Is Hard Work, written for 6th grade (teacher key)
A Most Unusual Bear, written for 7th grade (teacher key)
Saving the Panda, written for 8th grade (teacher key)

Peer Pressure

What do you do when friends push you to do something?

A Pal Can Ask, written for Pre-K and kindergarten (teacher key)
Kids Your Age Can Push, written for 1st grade (teacher key)
Feeling Pushed by Friends, written for 2nd grade (teacher key)
Saying No Thanks, written for 3rd grade (teacher key)
Friends and Pushes, written for 4th grade (teacher key)
Why Friends Push, written for 5th grade (teacher key)
Your Crowd and Your Choices, written for 6th grade (teacher key)
Fitting In, Standing Out, written for 7th grade (teacher key)
The Pull of the Group, written for 8th grade (teacher key)
Fitting In and Pushing Back, written for 9th grade (teacher key)
The Crowd in the Room, written for 10th grade (teacher key)
Why Teens Follow the Group, written for 11th grade (teacher key)
The Social Pull, written for 12th grade and up (teacher key)

Penguins

How do penguins stay warm?

Penguins Are Birds, written for 1st grade (teacher key)
Penguins on Land and Sea, written for 2nd grade (teacher key)
How Penguins Raise a Family, written for 3rd grade (teacher key)
How Penguins Stay Warm, written for 4th grade (teacher key)
Deep Divers of the South, written for 5th grade (teacher key)
Birds Built for the Sea, written for 6th grade (teacher key)
Penguins Then and Now, written for 7th grade (teacher key)
Giants and Ice, written for 8th grade (teacher key)
Reading the Fossil Clues, written for 9th grade (teacher key)
When the Giants Vanished, written for 10th grade (teacher key)
What Few Bones Can Tell, written for 11th grade (teacher key)

Peregrine Falcons

How fast can a peregrine falcon dive?

A Bird That Dives, written for Pre-K and kindergarten (teacher key)
Wings and Sharp Eyes, written for 1st grade (teacher key)
The Diving Hunter, written for 2nd grade (teacher key)
Falcon on the Ledge, written for 3rd grade (teacher key)
Down From the Sky, written for 4th grade (teacher key)
A Comeback in the Wild, written for 5th grade (teacher key)
Cliffs, Ledges and Towers, written for 6th grade (teacher key)
Hunters of Many Birds, written for 7th grade (teacher key)
How Fast Is Fast?, written for 8th grade (teacher key)
Measuring a Dive, written for 9th grade (teacher key)
The Dives That Were Measured, written for 10th grade (teacher key)
The Thin Eggshell Years, written for 11th grade (teacher key)
The Bird That Warned Us, written for 12th grade and up (teacher key)

Philippine Eagles

Why is the Philippine eagle so rare?

Eagle in the Trees, written for Pre-K and kindergarten (teacher key)
The Big Eagle of the Islands, written for 1st grade (teacher key)
Eagle of Four Islands, written for 2nd grade (teacher key)
Once the Monkey-Eating Eagle, written for 3rd grade (teacher key)
A Family in the Treetops, written for 4th grade (teacher key)
About 400 Pairs, written for 5th grade (teacher key)
Tracking a Rare Eagle, written for 6th grade (teacher key)
A Territory of Forest, written for 7th grade (teacher key)
What the Trackers Found, written for 8th grade (teacher key)
Numbers That Do Not Match, written for 9th grade (teacher key)
Release and Follow, written for 10th grade (teacher key)
A Small Gene Pool, written for 11th grade (teacher key)
The Eagle Named in 1896, written for 12th grade and up (teacher key)

Poop and Pee

Why do we poop and pee?

Going to Go, written for Pre-K and kindergarten (teacher key)
The Long Trip Inside, written for 1st grade (teacher key)
What Your Body Lets Go, written for 2nd grade (teacher key)
Inside the Long Tube, written for 3rd grade (teacher key)
The Journey of Lunch, written for 4th grade (teacher key)
From Food to Toilet, written for 5th grade (teacher key)
Filters, Muscles and Toilets, written for 6th grade (teacher key)
The Body's Two Exits, written for 7th grade (teacher key)
The Sorting System, written for 8th grade (teacher key)
Evidence in the Pipes, written for 9th grade (teacher key)
Waste as a Resource, written for 10th grade (teacher key)
What the Body Gives Back, written for 11th grade (teacher key)
A Natural History of Waste, written for 12th grade and up (teacher key)

Pushes and Pulls

What makes things move?

A Push, a Pull, written for Pre-K and kindergarten (teacher key)
Forces at Work, written for 1st grade (teacher key)
Why Things Stop, written for 2nd grade (teacher key)
Hammer, Feather, Moon, written for 3rd grade (teacher key)
Balanced and Unbalanced, written for 4th grade (teacher key)
Forces You Can Name, written for 5th grade (teacher key)
Measuring a Push, written for 6th grade (teacher key)
How We Learned About Motion, written for 7th grade (teacher key)
Thought Experiments and Numbers, written for 8th grade (teacher key)
Pairs, Squares and Trade-offs, written for 9th grade (teacher key)
Models and Where They Stop, written for 10th grade (teacher key)
From Galileo's Slopes to the Principia, written for 11th grade (teacher key)
What Gravity Still Hides, written for 12th grade and up (teacher key)

Rainbows

How does a rainbow form?

Sun and Rain, written for Pre-K and kindergarten (teacher key)
Colors After Rain, written for 1st grade (teacher key)
A Circle of Color, written for 2nd grade (teacher key)
Drops That Split the Light, written for 3rd grade (teacher key)
Why the Sky Makes Colors, written for 4th grade (teacher key)
Your Own Rainbow, written for 5th grade (teacher key)
The 42-Degree Arch, written for 6th grade (teacher key)
A Light Show With No Stage, written for 7th grade (teacher key)
Bent Twice, Seen Once, written for 8th grade (teacher key)
What the Prism Proved, written for 9th grade (teacher key)
Globes, Prisms and a Rainbow Ray, written for 10th grade (teacher key)
The Caustic in the Rain, written for 11th grade (teacher key)
One Arc, Four Theories of Light, written for 12th grade and up (teacher key)

Red-Bellied Piranhas

What do piranhas really eat?

A Fish With a Red Tummy, written for Pre-K and kindergarten (teacher key)
Rivers, Fins and Fruit, written for 1st grade (teacher key)
Nests in the Mud, written for 2nd grade (teacher key)
Four Pounds of Fish, written for 3rd grade (teacher key)
Teeth That Keep Coming Back, written for 4th grade (teacher key)
Where and When They Feed, written for 5th grade (teacher key)
More Than Meat on the Menu, written for 6th grade (teacher key)
Safety in Numbers, written for 7th grade (teacher key)
Waiting in the Water Plants, written for 8th grade (teacher key)
Fins, Shoals and Stress, written for 9th grade (teacher key)
Fish Remains, Fins and Fruit, written for 10th grade (teacher key)
Counting Piranhas in a River, written for 11th grade (teacher key)
Reading a Piranha's Menu, written for 12th grade and up (teacher key)

Red Foxes

How do red foxes hunt and raise their kits?

Red Fox, written for Pre-K and kindergarten (teacher key)
Meet the Kit, written for 1st grade (teacher key)
Night Hunters, written for 2nd grade (teacher key)
Built to Hunt, written for 3rd grade (teacher key)
Fox Dens and Kits, written for 4th grade (teacher key)
Fox Numbers, written for 5th grade (teacher key)
Foxes of the Field, written for 6th grade (teacher key)
Across the Field, written for 7th grade (teacher key)
Ears in the Dark, written for 8th grade (teacher key)
Counting the Jumps, written for 9th grade (teacher key)
Which Way to Jump, written for 10th grade (teacher key)
A Range Finder in the Earth, written for 11th grade (teacher key)
Foxes, Ranges and a Disputed Sense, written for 12th grade and up (teacher key)

Red-Tailed Hawks

How does a red-tailed hawk spot its food from the sky?

A Hawk With a Red Tail, written for Pre-K and kindergarten (teacher key)
Hawk on a Perch, written for 1st grade (teacher key)
Eyes in the Sky, written for 2nd grade (teacher key)
High Perch, Sharp Eyes, written for 3rd grade (teacher key)
Built for Soaring, written for 4th grade (teacher key)
A Hawk for Every Place, written for 5th grade (teacher key)
Jamaicensis, written for 6th grade (teacher key)
A Hawk Named for Its Tail, written for 7th grade (teacher key)
The View from the Perch, written for 8th grade (teacher key)
Hawks Across the Seasons, written for 9th grade (teacher key)
Counting Hawks, written for 10th grade (teacher key)
Roads, Fields and Home Ranges, written for 11th grade (teacher key)
Room to Hunt, written for 12th grade and up (teacher key)

Reticulated Pythons

How long is the longest snake in the world?

The Longest Snake, written for Pre-K and kindergarten (teacher key)
Net on the Skin, written for 1st grade (teacher key)
The Snake in the Net Pattern, written for 2nd grade (teacher key)
Longest of All the Snakes, written for 3rd grade (teacher key)
Reaching Ten Meters, written for 4th grade (teacher key)
Growing Big in the Forest, written for 5th grade (teacher key)
Big Snake, Slow Meals, written for 6th grade (teacher key)
Medusa and Sumatra's Pythons, written for 7th grade (teacher key)
What the Python Senses, written for 8th grade (teacher key)
Seeing Heat in the Dark, written for 9th grade (teacher key)
Counting a Hidden Snake, written for 10th grade (teacher key)
Evidence From the River, written for 11th grade (teacher key)
Giant Snakes, Hard to Count, written for 12th grade and up (teacher key)

Robots

What is a robot?

What Is a Robot?, written for Pre-K and kindergarten (teacher key)
Robots at Work, written for 1st grade (teacher key)
Sense, Decide, Do, written for 2nd grade (teacher key)
Robots Out and About, written for 3rd grade (teacher key)
How Robots Work, written for 4th grade (teacher key)
Sense, Think, Move, written for 5th grade (teacher key)
Robots Far From Home, written for 6th grade (teacher key)
Is It a Robot?, written for 7th grade (teacher key)
Robots Beyond Earth, written for 8th grade (teacher key)
A Word From a Play, written for 9th grade (teacher key)
Arms on the Factory Floor, written for 10th grade (teacher key)
Easy for Us, Hard for Robots, written for 11th grade (teacher key)
Teaching Machines to Do, written for 12th grade and up (teacher key)

Rocks and Minerals

How are rocks made?

Rocks, Rocks, Rocks, written for Pre-K and kindergarten (teacher key)
Look at This Rock, written for 1st grade (teacher key)
Rocks Have a Story, written for 2nd grade (teacher key)
Rocks on the Move, written for 3rd grade (teacher key)
The Never-Ending Rock Story, written for 4th grade (teacher key)
Three Kinds of Rock, written for 5th grade (teacher key)
Following a Rock Through Time, written for 6th grade (teacher key)
Reading Clues in Stone, written for 7th grade (teacher key)
What the Minerals Remember, written for 8th grade (teacher key)
Reading the Rock, written for 9th grade (teacher key)
How Stone Keeps Time, written for 10th grade (teacher key)
Where the Definitions Blur, written for 11th grade (teacher key)
A Planet Written in Stone, written for 12th grade and up (teacher key)

Rot and Decomposers

What makes things rot?

Helpers on the Ground, written for Pre-K and kindergarten (teacher key)
Fuzzy Bread and Old Logs, written for 1st grade (teacher key)
The Slow Cleanup, written for 2nd grade (teacher key)
Inside a Compost Pile, written for 3rd grade (teacher key)
Fast Rot, Slow Rot, written for 4th grade (teacher key)
Where Dead Leaves Go, written for 5th grade (teacher key)
Fuzz, Enzymes and Air, written for 6th grade (teacher key)
Putting Rot to the Test, written for 7th grade (teacher key)
The Chemistry of Rot, written for 8th grade (teacher key)
Inside a Rotting Log, written for 9th grade (teacher key)
What the Flasks Showed, written for 10th grade (teacher key)
White Rot and the Coal Age, written for 11th grade (teacher key)
Rot Proved, Rot Measured, written for 12th grade and up (teacher key)

Scabs and Healing

How does a cut heal?

A Scab on My Hand, written for Pre-K and kindergarten (teacher key)
The Cut That Fixes Itself, written for 1st grade (teacher key)
Your Skin's Repair Crew, written for 2nd grade (teacher key)
The Body's Natural Bandage, written for 3rd grade (teacher key)
Four Steps to Mend a Cut, written for 4th grade (teacher key)
What Your Skin Does After a Scrape, written for 5th grade (teacher key)
Three Weeks Under a Scab, written for 6th grade (teacher key)
From Clot to Scar, written for 7th grade (teacher key)
Patched, Not Rebuilt, written for 8th grade (teacher key)
Why a Scar Is a Quick Patch, written for 9th grade (teacher key)
Cells That Make the Scar, written for 10th grade (teacher key)
Tracing the Cells Behind a Scar, written for 11th grade (teacher key)
Could Skin Regrow Instead of Scar?, written for 12th grade and up (teacher key)

Secretarybirds

Why does a secretarybird stomp its feet?

A Bird with Long Legs, written for Pre-K and kindergarten (teacher key)
Look at the Walking Bird, written for 1st grade (teacher key)
Long Legs on the Grass, written for 2nd grade (teacher key)
A Hunter on Foot, written for 3rd grade (teacher key)
Short Grass, Wide View, written for 4th grade (teacher key)
Walkers of the Savanna, written for 5th grade (teacher key)
The Bowman of Africa, written for 6th grade (teacher key)
Marching Eagle, written for 7th grade (teacher key)
Across the Open Grass, written for 8th grade (teacher key)
Fifteen Milliseconds, written for 9th grade (teacher key)
Old Lines and New Counts, written for 10th grade (teacher key)
Sister to the Osprey, written for 11th grade (teacher key)
Counting the Walkers, written for 12th grade and up (teacher key)

Shadows

How are shadows made?

Dark Shapes on the Ground, written for Pre-K and kindergarten (teacher key)
Where the Light Stops, written for 1st grade (teacher key)
When the Sky Makes a Shadow, written for 2nd grade (teacher key)
Rays, Rotation and Shade, written for 3rd grade (teacher key)
The Shape Behind the Light, written for 4th grade (teacher key)
Shadows From Here to the Moon, written for 5th grade (teacher key)
Sticks, Sundials and Eclipses, written for 6th grade (teacher key)
The Edge of a Shadow, written for 7th grade (teacher key)
Noon, New Moons and Puppets, written for 8th grade (teacher key)
The Geometry of Shade, written for 9th grade (teacher key)
Clocks Made of Shade, written for 10th grade (teacher key)
A Stick, a Well and a Planet, written for 11th grade (teacher key)
Long Shadows, Last Eclipses, written for 12th grade and up (teacher key)

Sharks

How do sharks hunt, and are they dangerous?

Meet the Shark, written for Pre-K and kindergarten (teacher key)
Two Big Sharks, written for 1st grade (teacher key)
Tiny Sharks, Giant Sharks, written for 2nd grade (teacher key)
A Shark's Dinner, written for 3rd grade (teacher key)
Sharks of Every Kind, written for 4th grade (teacher key)
Built to Hunt, written for 5th grade (teacher key)
Small Numbers, Big Fish, written for 6th grade (teacher key)
The Hunter's Toolkit, written for 7th grade (teacher key)
Old Fish, New Science, written for 8th grade (teacher key)
Reading the Water, written for 9th grade (teacher key)
Slow Lives, Deep Time, written for 10th grade (teacher key)
The Numbers on Sharks, written for 11th grade (teacher key)
Sharks Under Pressure, written for 12th grade and up (teacher key)

Simone Biles

Who is Simone Biles?

Meet Simone, written for Pre-K and kindergarten (teacher key)
Simone on the Mat, written for 1st grade (teacher key)
Four Events, Many Medals, written for 2nd grade (teacher key)
Scores, Judges and Gold, written for 3rd grade (teacher key)
Simone Biles and the Scoring Mat, written for 4th grade (teacher key)
Scores, Routines and Medals, written for 5th grade (teacher key)
Thirty-Three Thousandths, written for 6th grade (teacher key)
Four Apparatus, One Code, written for 7th grade (teacher key)
From Level 8 to Olympic Champion, written for 8th grade (teacher key)
Rules That Changed the Mat, written for 9th grade (teacher key)
Open-Ended Scores, written for 10th grade (teacher key)
Difficulty Without Deductions, written for 11th grade (teacher key)
A Career in the Code of Points, written for 12th grade and up (teacher key)

Sleep and Dreams

Why do we sleep and dream?

Sleepy Time, written for Pre-K and kindergarten (teacher key)
Moon Up, Eyes Closed, written for 1st grade (teacher key)
A Good Night's Rest, written for 2nd grade (teacher key)
Inside a Night of Sleep, written for 3rd grade (teacher key)
The Body Clock at Night, written for 4th grade (teacher key)
Why Your Brain Needs Bedtime, written for 5th grade (teacher key)
Stages of a Night, written for 6th grade (teacher key)
How Sleep Changes With Age, written for 7th grade (teacher key)
A Night in Stages, written for 8th grade (teacher key)
The Hunt for REM, written for 9th grade (teacher key)
Sleeping on What You Learned, written for 10th grade (teacher key)
Replays in the Dark, written for 11th grade (teacher key)
The Case for Sleeping On It, written for 12th grade and up (teacher key)

Snakes

How do snakes move without legs?

Look at the Snake, written for Pre-K and kindergarten (teacher key)
Scales, Coils and Tongues, written for 1st grade (teacher key)
No Legs, All Moves, written for 2nd grade (teacher key)
Ways to Slither, written for 3rd grade (teacher key)
Legs Not Needed, written for 4th grade (teacher key)
Tongues, Eyes and Heat, written for 5th grade (teacher key)
Moving Without Legs, written for 6th grade (teacher key)
Snakes Without Legs, written for 7th grade (teacher key)
Life Without Legs, written for 8th grade (teacher key)
Reading a Snake's Body, written for 9th grade (teacher key)
Where the Legs Went, written for 10th grade (teacher key)
Old Ideas, New Tests, written for 11th grade (teacher key)
Snake Science at Work, written for 12th grade and up (teacher key)

Snow Leopards

How do snow leopards live high in the mountains?

Meet the Snow Leopard, written for Pre-K and kindergarten (teacher key)
Up on the Mountain, written for 1st grade (teacher key)
Cats of the High Mountains, written for 2nd grade (teacher key)
Life on a Rocky Slope, written for 3rd grade (teacher key)
High in the Mountains of Asia, written for 4th grade (teacher key)
Fur, Paws and Prey, written for 5th grade (teacher key)
Twelve Countries, One Shy Cat, written for 6th grade (teacher key)
Rock Specialists, written for 7th grade (teacher key)
At Home on the Rocks, written for 8th grade (teacher key)
Measuring a Moving Cat, written for 9th grade (teacher key)
Counting What Hides, written for 10th grade (teacher key)
Reading the Evidence, written for 11th grade (teacher key)
The Count No One Has Finished, written for 12th grade and up (teacher key)

Snowy Owls

How do snowy owls live in the Arctic?

Look at the Owl, written for Pre-K and kindergarten (teacher key)
Snowy Owl, Snowy Land, written for 1st grade (teacher key)
A Nest on the Tundra, written for 2nd grade (teacher key)
Big, White and Watching, written for 3rd grade (teacher key)
The Hunter on the Tundra, written for 4th grade (teacher key)
A Year in the Life of an Owl, written for 5th grade (teacher key)
Nomads of the North, written for 6th grade (teacher key)
Following the Lemmings, written for 7th grade (teacher key)
Measured on the Tundra, written for 8th grade (teacher key)
Great Nomads of the North, written for 9th grade (teacher key)
How Scientists Follow an Owl, written for 10th grade (teacher key)
The Puzzle of the Big Moves, written for 11th grade (teacher key)
Counting a Wandering Species, written for 12th grade and up (teacher key)

Soccer and the World Cup

How does the World Cup work?

Eleven on the Grass, written for Pre-K and kindergarten (teacher key)
Kick, Score, Win, written for 1st grade (teacher key)
Whistle to Winner, written for 2nd grade (teacher key)
From Field to World Cup, written for 3rd grade (teacher key)
How the World Cup Works, written for 4th grade (teacher key)
From Whistle to World Champion, written for 5th grade (teacher key)
From Cuju to the Cup, written for 6th grade (teacher key)
Soccer by the Numbers, written for 7th grade (teacher key)
Throw-Ins, Corners and the 2026 Cup, written for 8th grade (teacher key)
Rulings, Restarts and 48 Teams, written for 9th grade (teacher key)
Referees, Rules and the First Cup, written for 10th grade (teacher key)
Rules Behind the World Cup, written for 11th grade (teacher key)
A World Cup in Numbers and History, written for 12th grade and up (teacher key)

Sperm Whales

How deep can a sperm whale dive?

Meet the Sperm Whale, written for Pre-K and kindergarten (teacher key)
A Whale With Big Teeth, written for 1st grade (teacher key)
Clicks in the Deep, written for 2nd grade (teacher key)
Down Into the Deep, written for 3rd grade (teacher key)
Diving for Squid, written for 4th grade (teacher key)
The Whale With a Waxy Head, written for 5th grade (teacher key)
Built for the Deep, written for 6th grade (teacher key)
What's in a Name?, written for 7th grade (teacher key)
Tagging the Deep Divers, written for 8th grade (teacher key)
Following Sperm Whales, written for 9th grade (teacher key)
Listening to the Deep, written for 10th grade (teacher key)
Clicks, Codas and Counts, written for 11th grade (teacher key)
What the Clicks Might Mean, written for 12th grade and up (teacher key)

Spiders

How do spiders make webs?

Eight Legs, written for Pre-K and kindergarten (teacher key)
Spiders Up Close, written for 1st grade (teacher key)
Spiders Are Not Insects, written for 2nd grade (teacher key)
Eight Legs and Silk, written for 3rd grade (teacher key)
How Spiders Catch Dinner, written for 4th grade (teacher key)
The Spider's Dinner Plan, written for 5th grade (teacher key)
Silk, Webs and Hunters, written for 6th grade (teacher key)
Webs, Burrows and Pounces, written for 7th grade (teacher key)
Building an Orb Web, written for 8th grade (teacher key)
Inside a Strand of Silk, written for 9th grade (teacher key)
Spiders Before the Dinosaurs, written for 10th grade (teacher key)
Spiders by the Numbers, written for 11th grade (teacher key)
A Body Built on Touch, written for 12th grade and up (teacher key)

Spotted Hyenas

Do hyenas really laugh, and how do they live?

Hyena Giggles, written for Pre-K and kindergarten (teacher key)
A Hyena Clan, written for 1st grade (teacher key)
Life in a Hyena Clan, written for 2nd grade (teacher key)
The Laughing Hyena, written for 3rd grade (teacher key)
The Giggling Clan, written for 4th grade (teacher key)
Whoops in the Night, written for 5th grade (teacher key)
Where Hyena Clans Roam, written for 6th grade (teacher key)
More Than a Laugh, written for 7th grade (teacher key)
Not Just Scavengers, written for 8th grade (teacher key)
Spots, Calls and Cameras, written for 9th grade (teacher key)
Built for the Night, written for 10th grade (teacher key)
Reading the Whoop, written for 11th grade (teacher key)
What a Clan Knows, written for 12th grade and up (teacher key)

Stars

What are stars, and why do they twinkle?

Look Up, See a Star, written for Pre-K and kindergarten (teacher key)
Bright Stars, Big Groups, written for 1st grade (teacher key)
So Many Stars, written for 2nd grade (teacher key)
How Far Is a Star?, written for 3rd grade (teacher key)
Inside a Shining Ball, written for 4th grade (teacher key)
Reading the Night Sky, written for 5th grade (teacher key)
How Stars End, written for 6th grade (teacher key)
Many Kinds of Stars, written for 7th grade (teacher key)
Measuring Starlight, written for 8th grade (teacher key)
Distances and Distant Worlds, written for 9th grade (teacher key)
The Life and Death of a Massive Star, written for 10th grade (teacher key)
Sorting and Measuring Stars, written for 11th grade (teacher key)
The Dense Remains, written for 12th grade and up (teacher key)

Solids, Liquids and Gases

What are the states of matter?

Ice, Water and Steam, written for Pre-K and kindergarten (teacher key)
Cube, Cup and Steam, written for 1st grade (teacher key)
Packed, Sliding or Spread Out, written for 2nd grade (teacher key)
Hard, Runny and Airy, written for 3rd grade (teacher key)
How Matter Changes Its State, written for 4th grade (teacher key)
Tiny Particles, Big Changes, written for 5th grade (teacher key)
Oobleck, Ice and Pressure, written for 6th grade (teacher key)
When Heat Meets Matter, written for 7th grade (teacher key)
Glass, Boiling Points and Ice, written for 8th grade (teacher key)
Equilibrium, Glass and Goo, written for 9th grade (teacher key)
Energy, Edges and the Fifth State, written for 10th grade (teacher key)
Forces, Fluids and Fifth States, written for 11th grade (teacher key)
How Scientists Study the States of Matter, written for 12th grade and up (teacher key)

Staying Safe in an Emergency

What should you do in an emergency?

Call 911, written for Pre-K and kindergarten (teacher key)
Find a Helper, written for 1st grade (teacher key)
Who Comes to Help, written for 2nd grade (teacher key)
Make a Plan, written for 3rd grade (teacher key)
What to Say, written for 4th grade (teacher key)
When Seconds Count, written for 5th grade (teacher key)
Inside a 911 Call, written for 6th grade (teacher key)
Fire, Weather, Quake, written for 7th grade (teacher key)
The Dispatcher's Job, written for 8th grade (teacher key)
Behind the Number, written for 9th grade (teacher key)
How 911 Finds You, written for 10th grade (teacher key)
Systems That Answer, written for 11th grade (teacher key)
Preparedness, written for 12th grade and up (teacher key)

Steller's Sea Eagles

How heavy is a Steller's sea eagle?

The Big Yellow Bill, written for Pre-K and kindergarten (teacher key)
A Big Eagle by the Sea, written for 1st grade (teacher key)
Wings Over the Salmon, written for 2nd grade (teacher key)
The Eagle Named for Steller, written for 3rd grade (teacher key)
Heaviest Eagle in the World, written for 4th grade (teacher key)
Built for Salmon, written for 5th grade (teacher key)
Where Salmon Draw the Eagles, written for 6th grade (teacher key)
Kapacchilikamui: God of the Eagles, written for 7th grade (teacher key)
Tracking the Young Eagles, written for 8th grade (teacher key)
Finding the Remote Eagle, written for 9th grade (teacher key)
Salmon, Deer and Lead, written for 10th grade (teacher key)
Counting the Hard-to-Count, written for 11th grade (teacher key)
What the Models Say, written for 12th grade and up (teacher key)

Swordfish

What does a swordfish use its sword for?

A Fish With a Sword, written for Pre-K and kindergarten (teacher key)
Sword in the Sea, written for 1st grade (teacher key)
Day and Night in the Deep, written for 2nd grade (teacher key)
Why a Sword?, written for 3rd grade (teacher key)
What the Sword Is For, written for 4th grade (teacher key)
Big, Bigger, Biggest, written for 5th grade (teacher key)
Warm Eyes in the Deep, written for 6th grade (teacher key)
Marks on the Menu, written for 7th grade (teacher key)
A Menu Across the Seas, written for 8th grade (teacher key)
The Twilight Zone Diet, written for 9th grade (teacher key)
Following a Hidden Fish, written for 10th grade (teacher key)
The Life of a Swordfish, in Numbers, written for 11th grade (teacher key)
Reading the Evidence on a Swordfish, written for 12th grade and up (teacher key)

The Tallest Buildings

What is the tallest building in the world?

Up, Up, Up, written for Pre-K and kindergarten (teacher key)
Taller Than Tall, written for 1st grade (teacher key)
Up, Up, Up, written for 2nd grade (teacher key)
How Tall Is the Tallest?, written for 3rd grade (teacher key)
The Title Keeps Moving, written for 4th grade (teacher key)
Measuring the Sky, written for 5th grade (teacher key)
Who Held the Title, written for 6th grade (teacher key)
Who Decides What Is Tall, written for 7th grade (teacher key)
Cathedrals, Obelisks and Iron, written for 8th grade (teacher key)
Vanity Height, written for 9th grade (teacher key)
The Race Behind the Spire, written for 10th grade (teacher key)
The Rules of the Record, written for 11th grade (teacher key)
One Kilometer Up, written for 12th grade and up (teacher key)

Tasmanian Devils

What is a Tasmanian devil really like?

Meet a Devil, written for Pre-K and kindergarten (teacher key)
Devils Rest by Day, written for 1st grade (teacher key)
A Stocky Night Animal, written for 2nd grade (teacher key)
Keeping the Bush Clean, written for 3rd grade (teacher key)
A Devil's Night Out, written for 4th grade (teacher key)
Growing Up Devil, written for 5th grade (teacher key)
Devils Through the Years, written for 6th grade (teacher key)
Senses and Survival, written for 7th grade (teacher key)
Devils by the Numbers, written for 8th grade (teacher key)
How Scientists Study Devils, written for 9th grade (teacher key)
Reading the Evidence, written for 10th grade (teacher key)
Studying a Scavenger, written for 11th grade (teacher key)
Devils and the Bush, written for 12th grade and up (teacher key)

Teeth

Why do we lose our baby teeth?

Bite, Chew, Grow, written for Pre-K and kindergarten (teacher key)
Two Sets of Teeth, written for 1st grade (teacher key)
What Is Inside a Tooth?, written for 2nd grade (teacher key)
Teeth That Never Quit, written for 3rd grade (teacher key)
Built to Bite and Chew, written for 4th grade (teacher key)
Alive Inside, Hard Outside, written for 5th grade (teacher key)
From Plaque to Cavity, written for 6th grade (teacher key)
The Teeth You Trade In, written for 7th grade (teacher key)
The Layers of a Tooth, written for 8th grade (teacher key)
Stronger Than Spider Silk, written for 9th grade (teacher key)
Can Teeth Be Regrown?, written for 10th grade (teacher key)
A Lifetime of Teeth, written for 11th grade (teacher key)
Built to Last, Built Once, written for 12th grade and up (teacher key)

The Alphabet

Where did our letters come from?

Letters Have Sounds, written for Pre-K and kindergarten (teacher key)
Our Letters, written for 1st grade (teacher key)
Before the ABCs, written for 2nd grade (teacher key)
Alphabets Near and Far, written for 3rd grade (teacher key)
From Pictures to Letters, written for 4th grade (teacher key)
An Ox Head Named Aleph, written for 5th grade (teacher key)
Letters on the Road, written for 6th grade (teacher key)
Kinds of Writing, written for 7th grade (teacher key)
How Writing Slimmed Down, written for 8th grade (teacher key)
Reading the Evidence, written for 9th grade (teacher key)
Who Made the First Letters?, written for 10th grade (teacher key)
Borrowed, Bent and Built, written for 11th grade (teacher key)
The Long Road to A, written for 12th grade and up (teacher key)

The Bermuda Triangle

What is the Bermuda Triangle?

Out at Sea, written for Pre-K and kindergarten (teacher key)
Ships, Planes and Storms, written for 1st grade (teacher key)
A Busy Patch of Sea, written for 2nd grade (teacher key)
The Sea with a Story, written for 3rd grade (teacher key)
Who Named the Triangle?, written for 4th grade (teacher key)
The Librarian Who Checked, written for 5th grade (teacher key)
Checking the Stories, written for 6th grade (teacher key)
Three Corners on the Atlantic, written for 7th grade (teacher key)
Weather on the Warm River, written for 8th grade (teacher key)
When the Needle Points Elsewhere, written for 9th grade (teacher key)
Counting the Trouble, written for 10th grade (teacher key)
Tracing a Legend Back, written for 11th grade (teacher key)
A Sea, a Story and the Evidence, written for 12th grade and up (teacher key)

The Brain

How does your brain work?

Brain Parts and Their Jobs, written for 5th grade (teacher key)
Inside Your Head, written for 6th grade (teacher key)
Signals, Gaps and Cases, written for 7th grade (teacher key)
Counting the Cells, written for 8th grade (teacher key)
Seeing Single Cells, written for 9th grade (teacher key)
Cells, Signals and Memory, written for 10th grade (teacher key)

The Deep Ocean

What lives at the bottom of the ocean?

Look Way Down, written for Pre-K and kindergarten (teacher key)
A Light in the Dark, written for 1st grade (teacher key)
Animals of the Deep Sea, written for 2nd grade (teacher key)
Going Down, written for 3rd grade (teacher key)
The Dark Layers, written for 4th grade (teacher key)
Life Without Sunlight, written for 5th grade (teacher key)
Diving to the Bottom, written for 6th grade (teacher key)
Layers of the Dark Sea, written for 7th grade (teacher key)
Lights in the Deep, written for 8th grade (teacher key)
Life Without Sunlight, written for 9th grade (teacher key)
Down to the Floor, written for 10th grade (teacher key)
Sounding the Deep, written for 11th grade (teacher key)
What the Deep Keeps Hidden, written for 12th grade and up (teacher key)

The Human Body

How does your body work?

Inside You, written for 1st grade (teacher key)
Inside Your Body, written for 2nd grade (teacher key)
How Your Body Works, written for 3rd grade (teacher key)
Your Body's Parts, written for 4th grade (teacher key)
The Body Up Close, written for 5th grade (teacher key)
Your Body, Part by Part, written for 6th grade (teacher key)
Jobs Inside You, written for 7th grade (teacher key)
Signals and Shadows, written for 8th grade (teacher key)
Counting the Body, written for 9th grade (teacher key)
How We Learned the Body, written for 10th grade (teacher key)
Messages, Defenders and Early Studies, written for 11th grade (teacher key)

The Moon

Why does the Moon change shape?

The Moon We See, written for Pre-K and kindergarten (teacher key)
A Far Rocky Place, written for 1st grade (teacher key)
First Steps on the Moon, written for 2nd grade (teacher key)
Phases and the Far Side, written for 3rd grade (teacher key)
Phases and Eclipses, written for 4th grade (teacher key)
Moon Light, Moon Visits, written for 5th grade (teacher key)
Getting to Know the Moon, written for 6th grade (teacher key)
The Moon's Many Moves, written for 7th grade (teacher key)
Reading the Moon's Past, written for 8th grade (teacher key)
Sun, Moon and Earth in Line, written for 9th grade (teacher key)
Rocks Brought Home, written for 10th grade (teacher key)
Reaching the Moon, written for 11th grade (teacher key)
How We Know the Moon, written for 12th grade and up (teacher key)

The Ocean

How deep is the ocean?

The Big Blue Sea, written for Pre-K and kindergarten (teacher key)
Big Salty Water, written for 1st grade (teacher key)
Salt, Tides and Reefs, written for 2nd grade (teacher key)
Deep, Dark and Salty, written for 3rd grade (teacher key)
How the Ocean Works, written for 4th grade (teacher key)
Waves, Tides and Trenches, written for 5th grade (teacher key)
Water That Covers the World, written for 6th grade (teacher key)
Voyages Into the Deep, written for 7th grade (teacher key)
Forces Beneath the Waves, written for 8th grade (teacher key)
A Connected Ocean, written for 9th grade (teacher key)
Sea Level, Heat and the Deep, written for 10th grade (teacher key)
Where the Lines Are Drawn, written for 11th grade (teacher key)
One Ocean, Many Questions, written for 12th grade and up (teacher key)

The Seasons

Why do we have seasons?

Sun, Snow and Leaves, written for Pre-K and kindergarten (teacher key)
A Tilted Earth, written for 1st grade (teacher key)
Why Summer Is Hot, written for 2nd grade (teacher key)
The Longest Day, written for 3rd grade (teacher key)
Sun on the Calendar, written for 4th grade (teacher key)
Seasons Around the World, written for 5th grade (teacher key)
The Slant of the Sun, written for 6th grade (teacher key)
Closest in Winter, written for 7th grade (teacher key)
Tilt, Heat and Rain, written for 8th grade (teacher key)
Monsoons and Midnight Suns, written for 9th grade (teacher key)
The Calendar Does Not Line Up, written for 10th grade (teacher key)
Slow Clocks of the Sky, written for 11th grade (teacher key)
Clocks Written in Leaves, written for 12th grade and up (teacher key)

The Seven Continents

What are the seven continents?

Big Lands, written for Pre-K and kindergarten (teacher key)
Seven Big Lands, written for 1st grade (teacher key)
Seven Giant Pieces, written for 2nd grade (teacher key)
The World in Pieces, written for 3rd grade (teacher key)
Where the Land Is, written for 4th grade (teacher key)
Land on the Move, written for 5th grade (teacher key)
How We Count the Land, written for 6th grade (teacher key)
The Count and the Lines, written for 7th grade (teacher key)
Records and Rivers, written for 8th grade (teacher key)
The Case for Moving Land, written for 9th grade (teacher key)
Lines on the Land, written for 10th grade (teacher key)
How We Know the Land, written for 11th grade (teacher key)
Drawing the Seven Continents, written for 12th grade and up (teacher key)

The Solar System

How many planets are there?

Eight Planets, written for Pre-K and kindergarten (teacher key)
Four Rocky Planets, written for 1st grade (teacher key)
Seven Worlds to See, written for 2nd grade (teacher key)
Earth and Its Neighbors, written for 3rd grade (teacher key)
Planets That Surprise, written for 4th grade (teacher key)
Eight Worlds in Order, written for 5th grade (teacher key)
Nothing Holds Still, written for 6th grade (teacher key)
Worlds Worth Visiting, written for 7th grade (teacher key)
Drawing the Line, written for 8th grade (teacher key)
Rocks That Came Back, written for 9th grade (teacher key)
Finding the Planets, written for 10th grade (teacher key)
Where the Water Is, written for 11th grade (teacher key)
How It All Began, written for 12th grade and up (teacher key)

The Sun

What is the Sun made of?

Big Bright Sun, written for Pre-K and kindergarten (teacher key)
Far Away and Very Hot, written for 1st grade (teacher key)
Where the Sun Gets Its Power, written for 2nd grade (teacher key)
A Star Called the Sun, written for 3rd grade (teacher key)
The Sun's Long Reach, written for 4th grade (teacher key)
A Star That Never Sits Still, written for 5th grade (teacher key)
From a Spinning Cloud to a Star, written for 6th grade (teacher key)
Four and a Half Billion Years Old, written for 7th grade (teacher key)
Reading the Sun's Moods, written for 8th grade (teacher key)
The Slow Road Out of the Core, written for 9th grade (teacher key)
How We Learned the Sun's Recipe, written for 10th grade (teacher key)
A Fleet Watching the Sun, written for 11th grade (teacher key)
What We Still Do Not Know About the Sun, written for 12th grade and up (teacher key)

The Water Cycle

Where does rain come from?

Up Goes the Sun's Wet, written for Pre-K and kindergarten (teacher key)
Where Rain Comes From, written for 1st grade (teacher key)
Water Goes Up and Comes Down, written for 2nd grade (teacher key)
Rain's Long Trip, written for 3rd grade (teacher key)
How Rain Gets Made, written for 4th grade (teacher key)
One Drop's Long Trip, written for 5th grade (teacher key)
Up, Over and Down Again, written for 6th grade (teacher key)
The Sky's Water Highway, written for 7th grade (teacher key)
The Long Way Round, written for 8th grade (teacher key)
Reading the Sky's Ledger, written for 9th grade (teacher key)
Heat Hidden in Water, written for 10th grade (teacher key)
Counting What Falls, written for 11th grade (teacher key)
Following the Water, written for 12th grade and up (teacher key)

Throwing Up

Why do we throw up?

Why We Throw Up, written for Pre-K and kindergarten (teacher key)
Stomach Bugs and Soap, written for 1st grade (teacher key)
The Big Squeeze, written for 2nd grade (teacher key)
When Eyes and Ears Disagree, written for 3rd grade (teacher key)
Your Body's Emergency Exit, written for 4th grade (teacher key)
The Great Stomach Squeeze, written for 5th grade (teacher key)
Reasons the Stomach Says No, written for 6th grade (teacher key)
The Brainstem Makes the Call, written for 7th grade (teacher key)
A Wave That Runs Backward, written for 8th grade (teacher key)
Catching a Reflex in the Act, written for 9th grade (teacher key)
The Alarm in the Brainstem, written for 10th grade (teacher key)
Still Arguing About the Heave, written for 11th grade (teacher key)
Inside the Heave, written for 12th grade and up (teacher key)

Tiger Sharks

Why is it called a tiger shark?

A Shark with Stripes, written for Pre-K and kindergarten (teacher key)
Stripes in the Sea, written for 1st grade (teacher key)
Bars, Pups and Big Teeth, written for 2nd grade (teacher key)
Hunting by Night, written for 3rd grade (teacher key)
How a Tiger Shark Grows Up, written for 4th grade (teacher key)
Spots Into Bars, written for 5th grade (teacher key)
Where Tiger Sharks Go, written for 6th grade (teacher key)
Reading the Water, written for 7th grade (teacher key)
Big, Old and Far from Shore, written for 8th grade (teacher key)
Tags, Depths and Diets, written for 9th grade (teacher key)
Growing Into the Deep, written for 10th grade (teacher key)
A Long Line Through Time, written for 11th grade (teacher key)
Open Questions in the Sea, written for 12th grade and up (teacher key)

Tigers

How do tigers hunt, and why do they have stripes?

Meet the Tiger, written for Pre-K and kindergarten (teacher key)
Big Cat with Stripes, written for 1st grade (teacher key)
Stripes and Stealth, written for 2nd grade (teacher key)
A Tiger Mother and Her Cubs, written for 3rd grade (teacher key)
Stripes, Night Eyes and Cubs, written for 4th grade (teacher key)
A Closer Look at Tigers, written for 5th grade (teacher key)
Orange in a Green World, written for 6th grade (teacher key)
A Hunter Built for Waiting, written for 7th grade (teacher key)
Eyes, Ears and Long Nights, written for 8th grade (teacher key)
Counting Tigers in the Forest, written for 9th grade (teacher key)
Counting Tigers by Their Stripes, written for 10th grade (teacher key)
What the Genes and Goals Showed, written for 11th grade (teacher key)
A Baseline for the Future, written for 12th grade and up (teacher key)

Trains

How do trains work?

Steam Train, Bullet Train, written for Pre-K and kindergarten (teacher key)
Steam Trains and Fast Trains, written for 1st grade (teacher key)
Trains of Many Kinds, written for 2nd grade (teacher key)
Trains Through Time, written for 3rd grade (teacher key)
Firsts on the Rails, written for 4th grade (teacher key)
What Makes a Train Go, written for 5th grade (teacher key)
Rocket at Rainhill, written for 6th grade (teacher key)
Keeping Time on the Rails, written for 7th grade (teacher key)
Laying Track the Hard Way, written for 8th grade (teacher key)
How Fast Can a Train Go?, written for 9th grade (teacher key)
Iron Roads Across America, written for 10th grade (teacher key)
How a Railway Runs, written for 11th grade (teacher key)

Tyrannosaurus Rex

How big was T. rex?

Meet the Big Dino, written for Pre-K and kindergarten (teacher key)
T. rex Was Big, written for 1st grade (teacher key)
T. rex, the Big Dinosaur, written for 2nd grade (teacher key)
T. rex: Size, Teeth and Sue, written for 3rd grade (teacher key)
How Big Was T. rex?, written for 4th grade (teacher key)
T. rex, Sue and Scotty, written for 5th grade (teacher key)
Fast Growers and Famous Bones, written for 6th grade (teacher key)
How We Know T. rex, written for 7th grade (teacher key)
Built to Crunch, written for 8th grade (teacher key)
Hunter or Scavenger?, written for 9th grade (teacher key)
Measuring a Giant, written for 10th grade (teacher key)
Reading the Evidence, written for 11th grade (teacher key)
What We Know and What We Argue, written for 12th grade and up (teacher key)

Volcanoes

How do volcanoes erupt?

Volcanoes Up Close, written for 1st grade (teacher key)
How a Volcano Works, written for 2nd grade (teacher key)
Magma, Lava and Ash, written for 3rd grade (teacher key)
Inside a Volcano, written for 4th grade (teacher key)
Where Volcanoes Are, written for 5th grade (teacher key)
Fire From the Ground, written for 6th grade (teacher key)
Reading the Warning Signs, written for 7th grade (teacher key)
Cooling the Planet, written for 8th grade (teacher key)
Big Eruptions, Big Rocks, written for 9th grade (teacher key)
Why Volcanoes Fizz, written for 10th grade (teacher key)
Reading the Rock, written for 11th grade (teacher key)

Voting

Why do people vote?

A Say for Everyone, written for Pre-K and kindergarten (teacher key)
Having a Say, written for 1st grade (teacher key)
Big Words of Voting, written for 2nd grade (teacher key)
How a Vote Works, written for 3rd grade (teacher key)
Who Gets to Vote, written for 4th grade (teacher key)
How the Vote Grew, written for 5th grade (teacher key)
Hands Up, Votes In, written for 6th grade (teacher key)
Behind the Ballot, written for 7th grade (teacher key)
Who Counted as a Voter, written for 8th grade (teacher key)
Who Got to Vote, written for 9th grade (teacher key)
Cast, Count, Check, written for 10th grade (teacher key)
Consent, Courts and the Ballot, written for 11th grade (teacher key)
What Makes a Vote Count, written for 12th grade and up (teacher key)

Weather

What makes the weather?

Rain, Snow and Wind, written for Pre-K and kindergarten (teacher key)
Look Up at the Sky, written for 1st grade (teacher key)
Big Storms Up Close, written for 2nd grade (teacher key)
How a Cloud Is Born, written for 3rd grade (teacher key)
Sky Machine, written for 4th grade (teacher key)
Storm Watchers, written for 5th grade (teacher key)
Wet Air and Wild Seas, written for 6th grade (teacher key)
Reading the Sky, written for 7th grade (teacher key)
Clouds, Scales and Storms, written for 8th grade (teacher key)
Why the Wind Turns, written for 9th grade (teacher key)
Heat Hidden in Water, written for 10th grade (teacher key)
What Nobody Knows Yet, written for 11th grade (teacher key)
The Unfinished Forecast, written for 12th grade and up (teacher key)

Whales

How do whales breathe and sleep?

Whale Giants and Pods, written for 1st grade (teacher key)
Teeth, Baleen and Blowholes, written for 2nd grade (teacher key)
Whales of Ice and Mud, written for 3rd grade (teacher key)
Deep Divers and Big Eaters, written for 4th grade (teacher key)
Sleeping Without Sinking, written for 5th grade (teacher key)
Breath and Sleep, written for 6th grade (teacher key)
Voices of the Sea, written for 7th grade (teacher key)
Feeding the Giants, written for 8th grade (teacher key)
Mothers and Journeys, written for 9th grade (teacher key)
The Whale Family Tree, written for 10th grade (teacher key)
Counting the Giants, written for 11th grade (teacher key)

What Animals Eat

What do animals eat?

Yum, Yum, Yum!, written for Pre-K and kindergarten (teacher key)
Plants, Meat or Both?, written for 1st grade (teacher key)
Tongues, Jaws and Dinner, written for 2nd grade (teacher key)
Built for Dinner, written for 3rd grade (teacher key)
Chewing, Straining, Waiting, written for 4th grade (teacher key)
Hungry All Day, written for 5th grade (teacher key)
Hunters, Grazers and Strainers, written for 6th grade (teacher key)
The Cost of a Meal, written for 7th grade (teacher key)
Where Carnivore Ends, written for 8th grade (teacher key)
Inside the Gut, written for 9th grade (teacher key)
Reading the Menu, written for 10th grade (teacher key)
The Energy Ledger, written for 11th grade (teacher key)
Still Arguing Over Dinner, written for 12th grade and up (teacher key)

What Babies Can Do

What could you do when you were a baby?

Look at the Baby, written for Pre-K and kindergarten (teacher key)
Tiny Hands, Big Eyes, written for 1st grade (teacher key)
Babies Are Busy, written for 2nd grade (teacher key)
From Grip to First Words, written for 3rd grade (teacher key)
Born Ready, written for 4th grade (teacher key)
Wired to Connect, written for 5th grade (teacher key)
The Newborn Toolkit, written for 6th grade (teacher key)
Ready on Day One, written for 7th grade (teacher key)
Listening Before Talking, written for 8th grade (teacher key)
Reading a Baby's Gaze, written for 9th grade (teacher key)
The Voice They Already Know, written for 10th grade (teacher key)
What the Looking Cannot Say, written for 11th grade (teacher key)
Before the First Word, written for 12th grade and up (teacher key)

What Floats and Sinks

Why do some things float?

Things That Float, written for Pre-K and kindergarten (teacher key)
Float or Sink?, written for 1st grade (teacher key)
What Holds a Boat Up, written for 2nd grade (teacher key)
Salt, Ships and Density, written for 3rd grade (teacher key)
Hover, Rise or Sink, written for 4th grade (teacher key)
Packed In Tight, written for 5th grade (teacher key)
The Push Beneath, written for 6th grade (teacher key)
Equal Volumes, Different Fates, written for 7th grade (teacher key)
A Crown and a Law, written for 8th grade (teacher key)
From the Bath to the Load Line, written for 9th grade (teacher key)
The Physics Under the Hull, written for 10th grade (teacher key)
When Water Breaks the Rules, written for 11th grade (teacher key)
What Is Still Argued About Floating, written for 12th grade and up (teacher key)

When Living Things Die

What happens when something dies?

A Still Leaf, written for Pre-K and kindergarten (teacher key)
When Life Stops, written for 1st grade (teacher key)
Where Do They Go?, written for 2nd grade (teacher key)
Life, Then Soil, written for 3rd grade (teacher key)
The Circle of Living, written for 4th grade (teacher key)
What Stops, What Goes On, written for 5th grade (teacher key)
The Clean-Up Crew, written for 6th grade (teacher key)
Dead Wood, Living Forest, written for 7th grade (teacher key)
How Long Is a Life?, written for 8th grade (teacher key)
Where the Energy Goes, written for 9th grade (teacher key)
Decay, Measured, written for 10th grade (teacher key)
What Remains, written for 11th grade (teacher key)
The Long Accounting, written for 12th grade and up (teacher key)

What If Gravity Stopped?

What would happen if gravity stopped?

The Day Things Stayed Up, written for Pre-K and kindergarten (teacher key)
Pretend Gravity Stopped, written for 1st grade (teacher key)
What Holds You Down?, written for 2nd grade (teacher key)
If the Pull Went Away, written for 3rd grade (teacher key)
A Pull You Cannot See, written for 4th grade (teacher key)
What Gravity Does All Day, written for 5th grade (teacher key)
Pull, Curve and Fall, written for 6th grade (teacher key)
Held Together, written for 7th grade (teacher key)
Falling Around the Earth, written for 8th grade (teacher key)
The Feeling of Floating, written for 9th grade (teacher key)
From Apples to Space-Time, written for 10th grade (teacher key)
The Weight of a Star, written for 11th grade (teacher key)
The Pull Beneath Everything, written for 12th grade and up (teacher key)

What If People Could Fly?

Could people ever fly like birds?

If We Had Wings, written for Pre-K and kindergarten (teacher key)
Wings and Feathers, written for 1st grade (teacher key)
Birds, Bats and Us, written for 2nd grade (teacher key)
What Holds Wings Up, written for 3rd grade (teacher key)
Wings for People?, written for 4th grade (teacher key)
Too Weak to Flap, written for 5th grade (teacher key)
Borrowing a Bird's Wing, written for 6th grade (teacher key)
How Birds Stay Up, written for 7th grade (teacher key)
The Weight Problem, written for 8th grade (teacher key)
Gliders and Pedal Power, written for 9th grade (teacher key)
Four Forces, One Wing, written for 10th grade (teacher key)
How Big Can a Flier Be?, written for 11th grade (teacher key)
From Leonardo to the Snowbird, written for 12th grade and up (teacher key)

What If the Sun Went Out?

What would happen if the Sun went out?

Hello, Sun, written for Pre-K and kindergarten (teacher key)
The Sun and Us, written for 1st grade (teacher key)
Pretend Without the Sun, written for 2nd grade (teacher key)
One Star Among Billions, written for 3rd grade (teacher key)
How the Sun Shines, written for 4th grade (teacher key)
Eight Minutes From the Sun, written for 5th grade (teacher key)
A Far-Off Sun, written for 6th grade (teacher key)
Everything the Sun Gives, written for 7th grade (teacher key)
Eight Minutes Later, written for 8th grade (teacher key)
The Warmth That Would Remain, written for 9th grade (teacher key)
Inside the Sun's Engine, written for 10th grade (teacher key)
The Sun's Long Story, written for 11th grade (teacher key)
If the Light Went Out, written for 12th grade and up (teacher key)

What Is Fair?

What makes something fair?

Fair Play, written for Pre-K and kindergarten (teacher key)
The Fair Thing to Do, written for 1st grade (teacher key)
Cut and Choose, written for 2nd grade (teacher key)
Who Gets to Choose?, written for 3rd grade (teacher key)
What Makes Things Fair, written for 4th grade (teacher key)
Cake, Coins and Votes, written for 5th grade (teacher key)
Fair Around the World, written for 6th grade (teacher key)
Early to Notice, written for 7th grade (teacher key)
Without Favorites, written for 8th grade (teacher key)
Where Fairness Begins, written for 9th grade (teacher key)
Splitting Things Fairly, written for 10th grade (teacher key)
Cake, Coins and Courts, written for 11th grade (teacher key)
Fairness From Cradle to Courtroom, written for 12th grade and up (teacher key)

What Is the News?

Where does the news come from?

News Is What Happened, written for Pre-K and kindergarten (teacher key)
Who Tells the News, written for 1st grade (teacher key)
From Event to Story, written for 2nd grade (teacher key)
Check Before You Tell, written for 3rd grade (teacher key)
Reading the News, written for 4th grade (teacher key)
Where Stories Come From, written for 5th grade (teacher key)
News, Opinion, Ads, written for 6th grade (teacher key)
Printing Presses and Telegraphs, written for 7th grade (teacher key)
Who Pays for News, written for 8th grade (teacher key)
How a Story Is Made, written for 9th grade (teacher key)
The Press and Its Freedom, written for 10th grade (teacher key)
How We Get News Now, written for 11th grade (teacher key)
Reading the News Well, written for 12th grade and up (teacher key)

When a Pet Dies

Why does it hurt so much when a pet dies?

Missing My Pet, written for Pre-K and kindergarten (teacher key)
A Pet Is Family, written for 1st grade (teacher key)
Why It Hurts, written for 2nd grade (teacher key)
Ways to Remember, written for 3rd grade (teacher key)
Loving Animals, written for 4th grade (teacher key)
The Bond, written for 5th grade (teacher key)
A Short Life, A Long Love, written for 6th grade (teacher key)
The Science of Missing Them, written for 7th grade (teacher key)
Pets Through Time, written for 8th grade (teacher key)
Why Pets Matter, written for 9th grade (teacher key)
Grief for a Pet, written for 10th grade (teacher key)
Memorials and Mourning, written for 11th grade (teacher key)
The Human-Animal Bond, written for 12th grade and up (teacher key)

Why the Sky Is Blue

Why is the sky blue?

Look Up at the Blue, written for Pre-K and kindergarten (teacher key)
Where the Blue Comes From, written for 1st grade (teacher key)
The Blue Over Our Heads, written for 2nd grade (teacher key)
A Black Sky at Noon, written for 3rd grade (teacher key)
Blue Light Gets Tossed Around, written for 4th grade (teacher key)
Measuring the Color of the Sky, written for 5th grade (teacher key)
One Sky, Many Colors, written for 6th grade (teacher key)
Blue by Subtraction, written for 7th grade (teacher key)
What Your Eyes Make of the Sky, written for 8th grade (teacher key)
Measuring the Blue, written for 9th grade (teacher key)
Reading the Light, written for 10th grade (teacher key)
The Violet Problem, written for 11th grade (teacher key)
Anatomy of a Blue Sky, written for 12th grade and up (teacher key)

Why We Have Rules

Why do we have rules?

Rules Help Us, written for Pre-K and kindergarten (teacher key)
Why Rules Are Here, written for 1st grade (teacher key)
The Reasons Behind Rules, written for 2nd grade (teacher key)
Why Rules Are There, written for 3rd grade (teacher key)
The Reasons for Rules, written for 4th grade (teacher key)
Rules, Small and Large, written for 5th grade (teacher key)
Even a King Follows, written for 6th grade (teacher key)
Peach Baskets and Kings, written for 7th grade (teacher key)
Why Agree to Rules?, written for 8th grade (teacher key)
Rules Worth Keeping, written for 9th grade (teacher key)
Who Writes the Rules, written for 10th grade (teacher key)
What Makes a Rule Fair, written for 11th grade (teacher key)
The Limits of the Law, written for 12th grade and up (teacher key)

Why You Look Like Your Family

Why do kids look like their parents?

Family Faces, written for Pre-K and kindergarten (teacher key)
Same and Not the Same, written for 1st grade (teacher key)
Who Do You Look Like?, written for 2nd grade (teacher key)
Looks That Run in Families, written for 3rd grade (teacher key)
Passed Down, written for 4th grade (teacher key)
Family Plus Surroundings, written for 5th grade (teacher key)
The Instructions Inside You, written for 6th grade (teacher key)
Two Copies of Every Gene, written for 7th grade (teacher key)
The Odds Behind Siblings, written for 8th grade (teacher key)
Dimmer Switches, written for 9th grade (teacher key)
Rediscovering Mendel, written for 10th grade (teacher key)
Reading the Double Helix, written for 11th grade (teacher key)
What Is Still Argued, written for 12th grade and up (teacher key)

Wolverines

How does a wolverine live in the cold north?

A Wolverine in the Snow, written for Pre-K and kindergarten (teacher key)
Up All Winter, written for 1st grade (teacher key)
The Biggest Land Weasel, written for 2nd grade (teacher key)
Snowshoes and Leftovers, written for 3rd grade (teacher key)
Skunk Bear of the North, written for 4th grade (teacher key)
Hard to Spot, written for 5th grade (teacher key)
Born in the Snow, written for 6th grade (teacher key)
The Snow Wanderer, written for 7th grade (teacher key)
Miles in the Snow, written for 8th grade (teacher key)
Wolverines and the Snow, written for 9th grade (teacher key)
Snow Is the Evidence, written for 10th grade (teacher key)
Law, Snow and Genes, written for 11th grade (teacher key)
The Animal That Needs Snow, written for 12th grade and up (teacher key)

How the levels work

Levels here are Peabody's own, not Lexile or guided-reading letters (those scales belong to other companies). Each passage is checked with the Flesch-Kincaid formula for its grade. A passage with three copies has an easier and a harder one written by a person, marked with a shape rather than a level so no child sees a label.

Nothing on this page asks for a name or saves anything. To see how a class is doing on assigned work, use class mode and its reports.