There are a whole range of different classroom activities on the Explore
section of the Geometry Expressions website.
Here are some of our favorites..String art
is a very nice lesson sequence examining the properties of parabolic curves found in simple string art designs.
looks at the curves formed by light reflected in a cylinder (such as a coffee cup).
From inductive reasoning to proof by induction
is an easy introduction to Geometry Expressions in an activity which uses inductive reasoning and introduces inductive proof.
Sketching an ellipse at the beach
uses sticks and string on a beach to draw an ellipse, and some other surprising curves.
The trammel of Archimedes draws ellipses with given semi-major
axes. This activity maps between this representation and the
Where to take a rugby kick
solves an old standard calculus problem using Geometry Expressions.