15 Free Math Websites for Students: Lessons, Practice and Tools

Choose a free math website by the job you need it to do: Khan Academy for course-based lessons and practice, Math is Fun or Purplemath for another explanation, Desmos or GeoGebra for visual exploration, and printable worksheets for practice away from the screen. For SAT preparation, start with College Board’s official resources.

This guide compares 15 options by learning task. The numbers organize the list; they are not a ranking. Effortless Math publishes this guide and appears in it. Our public lessons and worksheets are separate from our paid books.

Which free math website should you use?

• Elementary or middle school review: use Khan Academy for a sequence of lessons, Math is Fun for a second explanation, and Math-Drills for a short practice sheet.
• Algebra homework: read a Purplemath lesson, sketch the relationship in Desmos, then solve a new example on paper. Our Algebra 1 learning center connects topic lessons and practice.
• Geometry or functions: use GeoGebra to change a construction or graph and explain what stays the same.
• College math: Paul’s Online Math Notes offers algebra, calculus and differential-equation notes; MathWorld is useful for looking up a definition.
• SAT preparation: begin with official College Board practice, then use Khan Academy to review a weak skill. Our SAT Math center provides additional independent review.
• A challenging problem: explore NRICH or the free Art of Problem Solving resources. These serve a different purpose from a page of routine exercises.

15 free math websites, compared by purpose

1. Khan Academy — lessons and practice in a course sequence

Khan Academy is a useful starting point when you want to review a subject in order rather than search for isolated answers. Choose the course closest to your class and use its lessons and exercises to find gaps. Its free learning resources are distinct from optional Khanmigo services, some of which require a subscription. Check the Khanmigo plan details before choosing an AI tutoring option.

2. Effortless Math — topic review and printable practice

Use our free resource library to choose a grade, course or exam, or the worksheet finder to locate a specific skill. Start with one lesson and its matching practice rather than downloading everything at once. We also sell books; a book purchase is separate from using the public free resources. Our exam preparation is independent, so use the exam provider for current rules and official practice.

3. Math is Fun — short explanations and visual examples

Math is Fun organizes explanations, activities and tools under topics such as numbers, algebra, geometry and data. It suits a student or parent who wants another way to see an idea. Find the exact topic from class, work through an example, and then try a similar problem without looking. Use your class syllabus to decide the order.

4. Desmos — graphs and mathematical visualization

Desmos provides free graphing and other math tools. It is useful for seeing how an equation changes a graph, comparing functions, or checking a solution visually. A graph can support your reasoning, but it does not replace an explanation of the algebra. For a test, use that test provider’s calculator instructions and practice environment; the general website and an exam version may differ.

5. GeoGebra — interactive geometry, algebra and 3D exploration

GeoGebra combines calculators, geometry constructions, 3D tools and educational activities. Choose it when dragging a point or changing a parameter could help you understand a relationship. Its tools and educational resources are free for non-commercial use. Many features work without an account; online saving and sharing require one. Review the terms for your intended use.

6. Purplemath — written algebra explanations

Purplemath offers free algebra lessons with worked steps and discussion of common mistakes. It is a good fit when you prefer reading a method to watching a video. Follow the free lesson links: the site also promotes separate paid help and MathHelp courses. After reading, explain why each step is allowed and solve another problem yourself.

7. Paul’s Online Math Notes — algebra through calculus

Paul’s Online Math Notes includes algebra, Calculus I–III, differential equations and review materials, with worked examples and practice solutions. It is most useful when you know the topic you need to revisit. Match the section to your course; the material assumes different prerequisites across subjects. Attempt a practice problem before opening its solution.

8. Art of Problem Solving — enrichment and competition practice

The Art of Problem Solving free resources include Alcumus, videos, competition practice and the community-built AoPS Wiki. These suit students ready to spend time on unfamiliar problems and explain their reasoning. The free resources are separate from AoPS’s paid classes and books. Start with a level you can engage with; difficulty alone does not make a resource a better fit.

9. Wolfram MathWorld — a mathematical reference

Wolfram MathWorld is a reference for mathematical terms, formulas and related concepts. Use it to clarify a definition or follow connections between topics. Its notation can be demanding for beginners, so pair it with an introductory lesson when necessary. This entry refers to MathWorld, not to paid features of other Wolfram products.

10. Coolmath Games — selected logic and number games

Coolmath Games offers games across many categories, including logic, applied math and arithmetic. Choose a game with a clear learning purpose rather than assuming every game teaches the skill your child needs. Ask the learner to describe a strategy afterward. A short game can complement practice; it does not establish mastery of a grade-level curriculum.

11. BetterExplained — intuition behind a concept

BetterExplained uses visual ideas and analogies to discuss topics such as exponents, complex numbers, trigonometry and calculus. It is useful when you can follow a procedure but want to understand why it works. Free articles and an online calculus guide are available; the site also offers a paid ebook. Follow an explanation with a conventional worked problem to connect intuition to notation.

12. Math-Drills — printable skill practice

Math-Drills provides free printable worksheets organized by topics such as arithmetic, fractions, algebra and geometry, with answer keys. It suits teachers, parents and learners who need focused practice on paper. Choose the operation, number range and difficulty carefully. An answer key helps check a result; discuss the method when a learner cannot identify the mistake.

13. NRICH — reasoning and problem-solving tasks

NRICH, based at the University of Cambridge, offers free mathematical tasks and teacher and parent support for ages 3–18. Use it for discussion, exploring patterns and comparing approaches. Its curriculum-linked collections use a UK context, so check the actual task rather than assuming a direct US grade match. Allow time for an incomplete first attempt and a revised strategy.

14. CK-12 — FlexBooks and topic-based study

CK-12’s FlexBooks browser helps you find digital learning materials by subject. This is a more direct starting point for textbook-style study than the student homepage, which emphasizes its Flexi AI tutor. Choose a math topic that matches your course and check the lesson’s examples and practice. Follow the resource’s terms for reuse; access to a book does not mean every possible use is unrestricted.

15. College Board SAT Suite practice — official SAT and PSAT resources

College Board’s practice hub links official free SAT and PSAT preparation, including full-length digital practice in Bluebook, the Student Question Bank and Khan Academy skill review. College Board runs the official practice tools; Khan Academy is a complementary learning resource. Follow the provider’s account and device instructions for the option you choose.

Build one useful study session

1. Name the skill. Write a specific goal, such as solving equations with a variable on both sides.
2. Learn one method. Read or watch a relevant lesson. Write a short explanation in your own words.
3. Practice without the example. Work a small set on paper. Use a graphing tool only when it helps answer the question.
4. Review the error. Identify whether it came from the concept, a sign, arithmetic or reading the question. Correct it and try a fresh problem.
5. Check again later. Return to a similar problem in a later session to see whether you can still solve it independently.

For example, a student studying linear equations could start at our Algebra 1 center, read a matching explanation, and use a graph to check where the two sides are equal. A learner preparing for an exam should choose the matching exam center and use official practice to understand the test format.

Check free access, accounts and learning fit

“Free” here means the named learning resource offers useful material without buying a course or book. It does not mean every service on each provider’s website is free. Some sites display advertising, promote paid products or require an account for saved progress. Check the current access screen and privacy settings before creating an account, especially for a child.

These are selected resources, not a certification of every lesson, advertisement or feature. A website can help you learn independently, but it cannot promise a complete education or replace individual support in every situation. If a learner remains stuck, bring their written work to a teacher or tutor so the difficulty can be addressed directly.

Need a starting point? Browse our free math resources, choose one skill and try its practice before considering a paid book. If you later want organized book study, use the book catalog to check the actual format, contents, preview and price.