Programmers at Work: teacher key

How Coding Works, grade 3 edition, written for 3rd grade. See how programmers break a problem into parts, use loops and choices, and track down bugs.

Read the book. Print this page for the key.

Questions and answers

1. What does a loop let code do?
   • Do the same kind of job many times (answer)
   • Make a game board
   • Turn off the computer
2. What is decomposition?
   • Adding more bugs
   • Breaking a big problem into smaller parts (answer)
   • Writing a recipe
3. A variable is like a box. What can change in it?
   • The value (answer)
   • The computer
   • The year
4. In coding, what does debugging mean?
   • Counting to ten
   • Making a loop
   • Finding and fixing bugs (answer)
5. What is the order of instructions in a program called?
   • Its sequence (answer)
   • Its bug
   • Its value

Words

• decomposition: breaking into parts
• loop: a repeat
• variable: changing box
• debugging: fixing mistakes
• sequence: the order