Original Sample Activities

Give it a push!

Compare a gentle push and a strong push on the same cart.

START →

LET'S GO

Ready to explore

Choose the strength of your push.

Strength Gentle

A simplified model: the cart and surface stay the same. Friction slows the cart to a stop. Each push starts a new trial.

Add or remove heat to explore ice, liquid water, and water vapor.

SOLID · Ice

Ice is solid. It keeps its own shape.

Changes are shown in steps, not real time. Blue dots represent water particles; real water vapor is invisible. Use this model on screen only.

Tap equal pieces of the bar to shade a fraction.

Challenge: shade one half of the bar.

Equal parts

The whole bar stays the same size. The bottom number counts all equal parts; the top number counts shaded parts.