Experiment with the interactivity of "rolling" regular polygons, and explore how the different positions of the red dot affects the distance it travels at each stage.

Use the clocks to investigate French decimal time in this problem. Can you see how this time system worked?

Experiment with the interactivity of "rolling" regular polygons, and explore how the different positions of the red dot affects its speed at each stage.

Experiment with the interactivity of "rolling" regular polygons, and explore how the different positions of the red dot affects its vertical and horizontal movement at each stage.

Looking at the graph - when was the person moving fastest? Slowest?

Can you adjust the curve so the bead drops with near constant vertical velocity?

Points off a rolling wheel make traces. What makes those traces have symmetry?

Have a look here at some of your carefully "ratioed" recipes to make some bland, and not so bland, cereal bars.

Logo helps us to understand gradients of lines and why Muggles Magic is not magic but mathematics. See the problem Muggles magic.