On the bench · not built yet

Solid Spinner

Spin regions around an axis to make solids; stack disks and washers to find volume.

Nearby on the shelf

Meet the parent functions and their transformed relatives; sliders show what each parameter does.

Race to prove identities with drag-and-drop algebra steps; multiple routes to the same proof are celebrated.

Fly a plane through crosswinds; add velocity vectors to land on the runway.