Lessons
Interactive math lessons that live on the site itself — read the lesson, watch the diagrams drawn in chalk, then practice what you've learned in the quiz.
Introduction to Probability
Probability as counting outcomes, multi‑step experiments and tree diagrams, and the multiplication rule for experiments too big to draw.
ProbabilityIntro to Geometry
Space and dimensions, the Cartesian plane, points and their coordinates, line segments, and describing movement as a function.
GeometryIntroduction to Functions
What a function is — a rule turning an input into an output — through worked examples with numbers, shapes and colors, then domain and range.
Functions