Visualizers
Drag the curves. Interactive models for economics, math and computer science.
Supply & demand Drag the curves. Watch equilibrium, surplus, taxes and price controls respond in real time. Function grapher Plot several functions at once, with parameter sliders and a readable grid. Central limit theorem Sample from a wild distribution and watch the sample means go normal anyway. Sorting algorithm visualizer Bubble, insertion, selection, merge and quicksort, racing side by side. Unit circle explorer Drag the angle; see sine, cosine and tangent trace out together.