On the bench · not built yet
Size of Everything
From a virus to the Milky Way: compare sizes in scientific notation on a slider through scales.
Nearby on the shelf
Grade 8 · Math · Puzzle
Square Root Hunt
Squeeze the square root of 2 between closer and closer decimals on a zooming number line.
Grade 8 · Math · BuilderSki Slope Designer
Design ski runs by slope; too steep crashes, too flat stalls. Rise over run becomes a feel.
Grade 8 · Math · SimulatorTwo Trains
Two trains, two equations, one graph; drag speeds and start times to see where (and if) they meet.