The free, fun, and effective way to learn math!

Yes, and math suits self-teaching better than most subjects: every step you take is either valid or it is not, so you never need someone's opinion on whether you were right. What self-teaching usually lacks is the correction arriving in time - before you build ten more lines on top of a wrong one. That is what the board here does: it checks each line as you write it.

By solving, in small steps, with mistakes caught immediately. Watching a worked example is a different skill from producing one, which is why so many people understand the lesson and then fail the test. Work each problem yourself, one move at a time, and let something check the move before you go on.

Practise the step you get wrong, not the whole topic again. Most people who feel stuck are not missing the big idea - they drop a sign, lose a denominator, or forget to flip the inequality when multiplying by a negative. Because every move here is checked as you make it, the exact step you fumble becomes visible, and that is the one worth repeating.

Yes. Every math lesson runs in your browser, free, with nothing to install. Coddy sells a premium plan for its coding tracks; math does not require it.

It begins with solving equations one move at a time and builds up through fractions and parentheses, inequalities, absolute value, systems of equations, graphs on the plane and the number line, quadratics and the quadratic formula, exponentials, logarithms and trigonometry. More courses are added to the space over time.

Short sessions, most days, each ending on a problem you finished yourself. Re-reading notes creates a feeling of familiarity that disappears under exam conditions; retrieving a method from memory is what makes it stay. Three problems worked by hand beat an hour of watching someone else do thirty.