The curriculum
One way of teaching.
All of mathematics, eventually.
Every topic gets the same treatment calculus got: pictures before symbols, plain language before jargon, and real uses beside every idea. Each preview page below already teaches the big ideas — full interactive lessons follow.
Live now — full course
In development — big ideas live today
Algebra foundationsin developmentThe art of working with the unknown.Algebra is arithmetic with a placeholder: a letter standing for a number you don't know yet. That one move — naming the unknown — turns puzzles you'd solve by guessing into puzzles you solve by steps.Geometryin developmentSpace, shape, and the logic of seeing.Geometry is mathematics you can point at: lengths, angles, areas, and the surprising rules that connect them. It's also where you first watch a fact get proven — not asserted, proven.Trigonometryin developmentTriangles, circles, and everything that repeats.Trig starts as a tool for finding unknown sides of triangles — and then turns out to be the mathematics of anything that cycles: sound, light, tides, seasons, heartbeats. Two functions, sine and cosine, carry the whole subject.Linear algebrain developmentThe mathematics of many things at once.A vector is a list of numbers treated as one object; a matrix transforms whole collections of them in a single move. Linear algebra is how mathematics handles a thousand variables with the same ease as one.Probability & statisticsin developmentHonest reasoning under uncertainty.You can't know whether the coin lands heads — but you can know exactly how often it will in the long run. Probability quantifies uncertainty; statistics reads evidence backwards from data to truth. Together they're the mathematics of not being fooled.Differential equationsin developmentThe laws of nature, written as change.Nature rarely tells you what a quantity is — it tells you how the quantity changes. “Cooling is proportional to temperature difference.” “Growth is proportional to population.” A differential equation is that sentence in symbols; solving it reveals the future.Discrete mathematicsin developmentThe mathematics of steps, networks, and code.Calculus studies smooth, continuous change. Discrete math studies things that come in whole pieces: yes/no decisions, network connections, countable arrangements. It's the native mathematics of computers — which can only ever count.