Khan Academy is the best free math website for kids: it has math courses from kindergarten up, described as free, with teacher tools. This list is for teachers and homeschool parents of kindergarten to eighth graders. Zearn follows as a full free classroom program, and the rest mix games, curriculum and visual tools. Each entry states what the free part covers.
| # | Name | Best for | Price |
|---|---|---|---|
| 1 | Khan Academy | Best free math practice and lessons across all grades | Free |
| 2 | Zearn | Best free full math program for one classroom | Free plan, paid upgrades |
| 3 | Illustrative Mathematics (IM Math) | Best free math curriculum for a teacher who plans the lesson | Free plan, paid upgrades |
| 4 | Desmos | Best for interactive lessons and graphing from 6th grade | Free |
| 5 | SplashLearn | Best for assigning grade-sorted math games in K-5 | Free plan, paid upgrades |
| 6 | Prodigy Math | Best for motivating reluctant practisers in grades 1 to 8 | Free plan, paid upgrades |
| 7 | Math Playground | Best for word-problem models and logic puzzles | Free plan, paid upgrades |
| 8 | The Math Learning Center apps | Best for virtual manipulatives on a classroom screen | Free |
| 9 | PhET Interactive Simulations | Best for exploring ideas visually in grades 6 to 8 | Free |
| 10 | CK-12 | Best for adaptive practice and customizable math readers | Free |
Khan Academy
A nonprofit with more than 840 courses from kindergarten to early college, including a full math library. The About page describes the courses and teacher tools as free.
Watch for The About page does not give a price for Khanmigo, the AI tutoring tool, so confirm its cost separately before planning around it.
Visit Khan Academy ↗ Facts read on the maker’s page.
Zearn
A nonprofit's K-8 math platform with more than 1,000 digital lessons organized into Missions. Students learn with onscreen teachers, visual models and digital manipulatives, and every lesson includes paper-and-pencil problem solving. Zearn reports a Strong (Tier 1) Evidence for ESSA rating.
The free part: Always-free teacher and individual-classroom accounts cover one teacher and up to 35 students, with the full Zearn Math platform and instructional materials.
School Accounts are paid; pricing is by quote on the maker's site
Watch for The free account covers one classroom of up to 35 students; using Zearn across a whole school needs a paid School Account.
Visit Zearn ↗ Facts read on the maker’s page.
Illustrative Mathematics
A K-12 curriculum maker that puts the complete IM Math curriculum online at no cost, with full lessons, printable PDFs and implementation resources. The K-5 and 6-8 courses are the ones to look at for this list. Paid IM Certified partners sell official print and digital platforms.
The free part: The complete IM Math curriculum is online at no cost, with full lessons, printable PDFs and implementation resources.
Official print and enhanced digital versions come from paid IM Certified partners; prices vary by partner
Watch for This is a teacher-led curriculum, not a game or a self-paced practice site; polished print and digital platforms cost extra through IM Certified partners.
Desmos Studio / Amplify
Desmos Classroom is now Amplify Classroom, with hundreds of free lessons at teacher.desmos.com, such as Pizza Maker (ratios, grade 6) and Land the Plane (linear functions, grade 8). Desmos also offers free graphing, scientific, geometry and 3D calculators.
Watch for Desmos Classroom has been renamed Amplify Classroom and moved under Amplify, so older help pages may use the old name.
Visit Desmos ↗ Facts read on the maker’s page.
SplashLearn
A math and English program for preschool through grade 5. For teachers and schools it lists 8,000+ math and English games, activities and worksheets as free, with topics from counting and addition to multiplication and fractions.
The free part: Teachers and schools get the library of 8,000+ math and English games, activities and worksheets free.
Watch for The free offer is described for teachers and schools; the parent page we read showed no family pricing, so check what a home account includes.
Visit SplashLearn ↗ Facts read on the maker’s page.
Prodigy Education
A game-based math site for grades 1 to 8 that Prodigy says is free for educators, aligned to state standards. Children practise skills inside a game, and the teacher side includes reports. Prodigy also publishes Math Facts and an English game for grades 1 to 6.
The free part: Teachers get the standards-aligned game at no cost for grades 1 to 8 Math and 1 to 6 English; parent memberships are optional extras.
Parent membership prices are on the maker's site
Watch for The classroom game is free, but paid parent memberships add in-game extras and some premium tools, so what a child sees at home can differ from school.
Visit Prodigy Math ↗ Facts read on the maker’s page.
Math Playground
Hundreds of math games, puzzles and logic activities for grades K-6, sorted by grade and skill, from Thinking Blocks word problem models to fraction and number puzzles. The site describes its games as free.
The free part: Math games, puzzles and logic activities play free with ads; a subscription (Math Playground PLUS) removes ads and adds premium activities.
Watch for The free site shows ads (the pages carry an Advertisement label and a Go Ad-Free link); premium practice and bonus content need a subscription.
The Math Learning Center
Free apps based on the visual models in the Bridges in Mathematics curriculum: Fractions, Geoboard, Math Clock, Money Pieces, Number Chart and Math Vocabulary Cards. Each runs as a web app, with downloadable versions for iPad and other devices.
Watch for These are modelling tools for a teacher-led lesson, not games with scores, and the apps page mentions no student accounts or progress reports.
University of Colorado Boulder
Free interactive simulations from the University of Colorado Boulder, with a math and statistics category beside physics, chemistry, biology and earth science. Sims run in a browser or download, and the site lists teaching activities for them.
Watch for Only part of the library is math, and the simulations need a guiding task from the teacher.
Visit PhET Interactive Simulations ↗ Facts read on the maker’s page.
CK-12 Foundation
A nonprofit offering free K-12 textbooks (FlexBooks) that teachers can customize, adaptive practice and interactive explorations in math and science. Its practice pages say the service is free forever.
Watch for Built mainly around math and science and aimed at the whole K-12 range, so younger elementary children get less than on a K-5 site.
We weighed these, most important first. The order is our judgement against them, not a score or a vote, and a different teacher could reasonably order it differently.
We took no money, free products or affiliate commissions for any place on this list, and no link here carries a tracking code. Every fact was read on the maker’s own page on October 27, 2026; prices carry that date because they change. See how we choose and the ad-free promise.
Last checked October 27, 2026. Something out of date or missing? Tell us and we will fix it; makers can send corrections, never money.