Space

Space is the one subject students can't touch, so these free interactives hand them the controls instead: collapse a gas cloud into a star, tilt a planet and make its seasons. Real telescope imagery and real orbital math, with worksheets and NGSS-aligned lesson plans built in.

Star Builder

Collapse a real cloud of gas and dust and watch gravity build stars of different sizes, colors and fates.

NGSS MS-ESS1-2

Seasons in Orbit

Ride Earth around the Sun, tilt its axis, and prove it is the tilt, not the distance, that makes the seasons.

NGSS MS-ESS1-1 · MS-ESS2-6

Fusion Forge

Fuse two atoms against the Coulomb barrier, run the Sun's crushed core, then race ITER to breakeven in a tokamak you control.

NGSS HS-PS1-8 · HS-ESS1-1 · HS-ESS3-2