GeoGebra is a cross-platform Dynamic Mathematics Software that integrates Geometry and Algebra hence GeoGebra; and Calculus.

GeoGebra has elements of Dynamic Geometry Software, like Cabri Geometrie and Sketchpad and Computer Algebra systems like Mathematica and Maple.

1. Download GeoGebra from http://www.geogebra.org/webstart
2. Download GeoGebra for offline installation if you are not connected to the internet at: http://www.geogebra.org
3. Download examples on the use of GeoGebra, including workshop presentations and worksheets at http://www.geogebra.org/book/intro-en.zip
4. other materials available at http://www.geogebra.org/en/wiki
5. Use the GeoGebra community forum to share experiences on the use of GeoGebra at http://www.geogebra.org/forum