On the bench · not built yet
Skate Park Angles
Design ramps and turns with a protractor; the skater can only land certain angles.
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Grade 4 · Math · Simulator
Growth Spurt
Compare animals and plants: "times as tall" vs "taller by." Sliders show the difference between additive...
Grade 4 · Math · PuzzlePrime Garden
Plant numbers as rectangular gardens; primes only grow in a single row. Find every shape for 36.
Grade 4 · Math · PuzzleRule Machine
Numbers go in, numbers come out; guess the rule, then build one for classmates to crack.