Mathematics – 40+ UNIQUE Free Educational Websites (Grades K–12)
1. Khan Academy Math
URL: https://www.khanacademy.org/math
A nonprofit platform offering structured math courses from kindergarten through high school. It includes video lessons, practice problems, quizzes, and mastery tracking. Completely free and widely used worldwide.
2. CK-12 Math
URL: https://www.ck12.org/math/
Provides free digital math textbooks, adaptive practice, and interactive simulations. Content is aligned to school curricula and suitable for self-paced learning. All materials are openly licensed.
3. Math Is Fun
URL: https://www.mathsisfun.com
Explains math concepts using simple language, visuals, and examples. Covers arithmetic through calculus basics. Excellent for concept clarity across grades.
4. NRICH Mathematics
URL: https://nrich.maths.org
Developed by the University of Cambridge, NRICH focuses on problem-solving and mathematical thinking. It offers rich tasks and games for all age groups. Completely free and teacher-approved.
5. Desmos
URL: https://www.desmos.com
A free interactive graphing calculator and classroom activity platform. Supports algebra, functions, geometry, and statistics. Highly engaging for middle and high school students.
6. GeoGebra
URL: https://www.geogebra.org
Provides free tools for geometry, algebra, calculus, and statistics. Students can dynamically explore mathematical relationships. Used globally in secondary education.
7. Open Middle
URL: https://www.openmiddle.com
Focuses on higher-order thinking through open-ended math problems. Encourages multiple solution strategies. Best for grades 5–12.
8. Illustrative Mathematics
URL: https://illustrativemathematics.org
Offers free tasks and lesson resources emphasizing conceptual understanding. Content supports Common Core-aligned learning. Suitable for upper elementary through high school.
9. Math Playground
URL: https://www.mathplayground.com
Provides math games, puzzles, and logic challenges. Especially effective for elementary and middle school learners. Learning is interactive and engaging.
10. Cool Math
URL: https://www.coolmath.com
Offers fun math games and lessons covering logic, arithmetic, and problem-solving. Designed to make math enjoyable for younger students. Completely free.
11. Cool Math Games
URL: https://www.coolmathgames.com
Features hundreds of math-based games and brain teasers. Encourages logical thinking and numerical skills. Ideal for grades 1–8.
12. That Quiz
URL: https://www.thatquiz.org
Allows students to practice math skills through instant quizzes. Covers arithmetic, algebra, geometry, and more. Free and easy to use.
13. Math Open Reference
URL: https://www.mathopenref.com
A visual reference site focusing mainly on geometry. Explains concepts using diagrams and animations. Useful for middle and high school students.
14. Paul’s Online Math Notes
URL: https://tutorial.math.lamar.edu
Provides free notes and examples for algebra and calculus topics. Written in clear language with worked examples. Ideal for advanced high school students.
15. Purplemath
URL: https://www.purplemath.com
Offers clear explanations for algebra concepts with step-by-step solutions. Especially helpful for struggling learners. Free access to core lessons.
16. Cut the Knot
URL: https://www.cut-the-knot.org
Explores math concepts through puzzles and visual explanations. Covers geometry, number theory, and probability. Encourages curiosity-driven learning.
17. MathBits
URL: http://mathbitsnotebook.com
Provides interactive math notebooks and activities. Topics range from middle school math to algebra and geometry. Completely free resources.
18. Math Antics
URL: https://mathantics.com
Uses short, engaging videos to explain math concepts. Covers fractions, decimals, percentages, and more. Suitable for elementary and middle school.
19. Wild Math
URL: https://wildmath.com
Offers creative math challenges and puzzles. Encourages exploration and independent thinking. Best for enrichment activities.
20. MathPickle
URL: https://mathpickle.com
Provides open-ended math tasks and videos. Designed to promote curiosity and reasoning. Free and classroom-friendly.
21. Basic Mathematics
URL: https://www.basic-mathematics.com
Focuses on foundational arithmetic skills. Clear explanations and examples support early learners. Ideal for grades K–5.
22. AAA Math
URL: https://www.aaamath.com
Offers interactive practice for basic math skills. Includes timed exercises and explanations. Free for all users.
23. Hooda Math
URL: https://www.hoodamath.com
Features math games and logic puzzles. Designed to build problem-solving skills. Popular among elementary and middle school students.
24. Mathigon
URL: https://mathigon.org
Uses interactive storytelling to teach advanced math concepts. Visually rich and engaging. Suitable for middle and high school learners.
25. Get the Math
URL: https://www.thirteen.org/get-the-math
Shows real-world applications of math through videos and challenges. Developed by PBS. Helps students connect math to everyday life.
26. Math Central
URL: https://mathcentral.uregina.ca
Provides math problems and solutions from educators. Encourages inquiry-based learning. Suitable for grades 4–12.
27. Math Forum Archive
URL: https://mathforum.org
A large archive of math problems and discussions. Supports problem-solving and teacher resources. Freely accessible.
28. Brilliant – Free Math Section
URL: https://brilliant.org/practice/
Offers interactive math problems that build reasoning skills. Some content is free and suitable for enrichment. Best for upper grades.
29. Exeter Math
URL: https://www.exetermath.org
Provides problem-based learning materials inspired by Exeter Academy. Encourages deep mathematical thinking. Free to access.
30. Math Warehouse
URL: https://www.mathwarehouse.com
Focuses on geometry and algebra concepts using visuals. Includes interactive demonstrations. Suitable for middle and high school.
31. Visual Fractions
URL: http://www.visualfractions.com
Helps students understand fractions visually. Simple and effective design. Best for elementary learners.
32. Sheppard Software Math
URL: https://www.sheppardsoftware.com/math.htm
Provides interactive math games and tutorials. Covers arithmetic, fractions, and basic geometry. Ideal for younger students.
33. Math Goodies
URL: https://www.mathgoodies.com
Offers free lessons and practice on core math topics. Explanations are student-friendly. Useful across grade levels.
34. Algebra Help
URL: https://www.algebrahelp.com
Focuses on algebra fundamentals with worked examples. Supports students transitioning to higher math. Free lesson access.
35. QuickMath
URL: https://quickmath.com
Provides instant solutions and explanations for math problems. Useful for checking work and understanding steps. Best for middle and high school.
36. Math Help Boards
URL: https://mathhelpboards.com
Community-driven math problem explanations. Covers a wide range of topics. Free peer-supported learning.
37. MathDrills
URL: https://www.math-drills.com
Offers printable worksheets for arithmetic practice. Covers all basic operations. Ideal for skill reinforcement.
38. IXL Math – Free Skills
URL: https://www.ixl.com/math
Provides limited free math practice across grades. Skills are organized by topic and grade level. Useful for quick revision.
39. Symbolab Free Math Solver
URL: https://www.symbolab.com
Helps students solve math problems step-by-step. Supports algebra through calculus. Free basic usage available.
40. Math Stack Exchange
URL: https://math.stackexchange.com
A question-and-answer platform for math learners. Encourages deep understanding through explanations. Free community support.
41. Open Culture Math Resources
URL: https://www.openculture.com/math_free_courses
Curates free math lessons and materials. Includes videos and readings. Useful for enrichment.
42. TeacherTube Math
URL: https://www.teachertube.com/categories/math
Hosts free math instructional videos. Created by educators worldwide. Suitable for various grade levels.
43. Math Learning Center
URL: https://www.mathlearningcenter.org
Provides free math tools and activities. Focuses on conceptual understanding. Especially good for elementary grades.
44. CK-12 Arithmetic
URL: https://www.ck12.org/arithmetic/
Focused arithmetic practice and explanations. Supports foundational math skills. Completely free and student-friendly.
45. Math Problems
URL: https://www.mathproblems.info
Offers practice problems across multiple math topics. Simple and direct format. Useful for extra practice.