Twelve courses · 81 lessons · every level
Mathematics,
finally clear.
Learn mathematics visually, intuitively, and through real-life meaning. From algebra foundations to statistics, signals, and Fourier analysis — organized by difficulty, built for every level.
slope = the derivativearea = the integral
A taste of one course — calculus. Nine more await.
01The curriculum
Twelve subjects, one way of teaching — organized by level.
Browse the full curriculum →Foundations
Start here — little or no prerequisitesCore mathematics
The four pillars of the subjectApplied tracks
Where the pillars assemble into engineeringFeatured pathway
Math for machine learning & data science
A complete, visual foundation — linear algebra through SVD, the calculus of gradients, counting into probability and statistics, and the optimization that ties it all into how models learn. Built to be clearer than the textbooks, with a figure on every page.
- Vectors, norms, rank & SVD
- Gradients, chain rule & backprop
- Counting → probability → Bayes
- Estimation, regression & MLE
- Loss functions & gradient descent
02Start where you are
Three levels. Every lesson labeled. No one left behind.
Every lesson on the platform carries a difficulty rating, so you can climb at your own pace — from intuitive first ideas to engineering-grade depth.
Algebra, geometry, and trigonometry — intuitive and prerequisite-free.
Begin with foundations →
MediumCalculus, linear algebra, statistics, discrete math — solid intermediate reasoning.
Take on the pillars →
HardDifferential equations, signals, and Fourier analysis — proof- and engineering-oriented.
Go deep →
03Featured course
Statistics — the mathematics of data and machine learning.
Thirteen lessons from first intuitions to regression and the statistics of ML: distributions, Bayes' theorem, estimation and likelihood, hypothesis testing, and how generalization, overfitting, and evaluation are statistics in disguise.
Expectation & distributions
Bayes' theorem
Maximum likelihood
Correlation & regression
04Learn by doing
Nineteen interactives. Every big idea, touchable.
Drag a tangent along a wave. Watch a matrix bend space. Stack harmonics into a square wave. See aliasing fool a sampler, and the bell curve emerge from coin flips. Motion that teaches, never decorates.
Open the playground05Check your understanding
66 practice questions, filterable by level.
Go to practice →Concept checks from every lesson, gathered in one place with instant, kind explanations and live session mastery. Nothing graded — the only score is your own understanding.
06Guided pathways
Not sure where to start? Follow a road.
All 12 pathways →Beginner math foundations
Starting from scratch — or rebuilding shaky ground.
7 stops →
Math for machine learning & data science
Here for ML/data science? This is your road — clearer than the textbooks.
20 stops →
Calculus & change
Ready for the platform's flagship course.
7 stops →
Linear algebra & structure
For data, graphics, ML — the mathematics of many things at once.
6 stops →
Signals & systems
The engineering track: how devices hear, filter, and respond.
9 stops →
Fourier & the frequency domain
The deep end: spectra, sampling, FFTs, and honest analysis.
9 stops →
Differential equations & dynamic systems
Predicting the future: growth, decay, oscillation, simulation.
7 stops →
Data, probability & uncertainty
For honest reasoning with data, measurements, and noise.
6 stops →
07Why it matters
Mathematics is already running your day.
All 16 applications →Physics
Motion & velocity
Instantaneous speed — what the speedometer shows right now, not your trip average.
Physics
Acceleration
How quickly speed changes: the derivative of a derivative.
Physics
Falling objects
Exactly when and how fast it lands, from h(t) = h₀ − ½gt².
Biology
Population growth
Future population when growth is proportional to current size: exponential curves.
Epidemiology
Disease spread
When case curves accelerate, peak, and turn over — the inflection points health agencies watch.
Finance
Finance & compound growth
Continuous compounding (A = Pe^rt), present value, and how sensitive options are to price moves.
You were never “bad at math.”
It was badly explained.
Twelve courses, 81 lessons, every level. Every picture touchable, every idea connected to the world.
Track progress, build a review queue, and pick up where you left off on your dashboard.