Learn all of maths, in order.

From counting to the open problems. Pick where you are; every lesson shows its steps, draws the picture, and hides the answer until you ask.

  1. 1 Arithmetic 4 lessons
  2. 2 Algebra 11 lessons
  3. 3 Geometry 6 lessons
  4. 4 Trigonometry 4 lessons
  5. 5 Precalculus 7 lessons
  6. 6 Calculus 7 lessons
  7. 7 Linear Algebra 5 lessons
  8. 8 Statistics & Probability 15 lessons
  9. 9 Discrete Math & Logic 2 lessons
  10. 10 Number Theory 7 lessons
  11. 11 Differential Equations 5 lessons
  12. 12 Analysis 5 lessons
  13. 13 Frontiers 6 lessons

Or bring your own problem

Type it, or draw it with your mouse or finger. Equations, derivatives, matrices, triangles, primes — or a word problem the tutor breaks into parts.

What each stage covers

Each one is a set of lessons with a live worked example, a visual, and a solver tuned for it.

Stage 1 Arithmetic Numbers, fractions, percentages and the order of operations. Stage 2 Algebra Equations, inequalities, factoring, functions and systems. Stage 3 Geometry Triangles, circles, polygons, solids and coordinates. Stage 4 Trigonometry Angles, the unit circle, identities and trig equations. Stage 5 Precalculus Functions in depth, complex numbers, sequences, conics and vectors. Stage 6 Calculus Limits, derivatives, integrals, series and optimisation. Stage 7 Linear Algebra Matrices, determinants, inverses, row reduction and eigenvalues. Stage 8 Statistics & Probability Averages, spread, counting and probability. Stage 9 Discrete Math & Logic Counting, logic, truth tables, sets and proof. Stage 10 Number Theory Primes, divisibility, gcd, modular arithmetic and sequences. Stage 11 Differential Equations Equations whose unknown is a function: growth, oscillation, and how physics is written. Stage 12 Analysis Limits made rigorous: sequences, series, convergence, improper integrals, complex numbers as functions. Stage 13 Frontiers The open problems — Riemann, Navier–Stokes, P vs NP — broken into what you need to even read them.

How it works

1

Type it or draw it

“derivative of x² sin x”, “is 561 prime”, “triangle 3 4 5” — or sketch the equation on the pad and it is read for you.

2

Watch every move

One rule per step — the product rule, a row operation, a Euclid division — animated, and explained in a sentence.

3

See the shape of it

Curves with their roots marked, surfaces you can rotate, triangles drawn to scale, factor trees, matrices as vectors in space.

4

The impossible ones too

A word problem, a proof, an open question: the tutor breaks it into parts you can attack, tells you what is known, and hides the solution until you want it.