# Geogebra

GeoGebra "is a free and multi-platform dynamic mathematics software for schools that joins geometry, algebra and calculus."

The simplest way to get started is just to press one of these:

- Optimized for geometry:
- Optimized for algebra:

If GeoGebra doesn't work, make sure you have Java 1.4.2 (or later) installed and active in your browser.

Check out some of my GeoGebra toys.