GeoGebra

Interactive program that allows users to model, graph and visualize math expressions

Overview

GeoGebra allows students to create math models and interactive with them by dragging objects and changing parameters. The program is designed for classrooms in secondary schools but can be used for any student studying geometry, algebra, or calculus. Students can create graphs with with points, vectors, segments, lines and conic sections as well as functions while changing them dynamically afterwards. In addition, equations and coordinates can be entered directly to generate graphs.

The website also allows educators to create worksheets, which they are encouraged to share with the public. These can be found here.

Developed by Markus Hohenwarter, who began the project in 2001 at the University of Salzburg, the program was first released in 2002. Since then the program has gone through numerous iterations and updates, and the team of directors and developers have grown considerably. (Most are based in Europe.) Currently the program is on Version 4.0, released October 2011.

The program has received numerous education awards, and there are dedicated vents around the world for its users. There are plans to bring the program onto the iPad.