✓ Free math lessons, practice and calculators

Math you can follow step by step.

Clear algebra and calculus lessons written by a math teacher, practice problems that check every answer instantly, and calculators that show their working, not just the result. Free, with no sign-up.

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Learn math step by step

Every lesson states the rule plainly, shows where it comes from, and works through examples from easy to hard, the way a teacher would at the board. Each one links to practice problems so you can check your understanding straight away.

𝑥 141 lessons · 8 chapters

Algebra

From exponents and factoring to functions, logarithms, systems of equations and sequences, in the order you need them.

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∫ 28 lessons so far

Calculus

An algebra and trigonometry review, limits from the first idea to L’Hôpital’s rule, then derivatives and the rules for finding them.

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✓ 147 practice sets

Practice problems

Problems that check your answer instantly, with full worked solutions, so you know exactly where you went wrong.

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Calculators that show their working

The calculators explain the formula they use, most with a worked example, so you can check the answer by hand. Pick a category to see every calculator inside it.

🏗️ 21 calculators