* Interactive graphics, algebra and spreadsheet
* From elementary school to university level
* Free learning materials
GeoGebra is free educational mathematics software that joins dynamic geometry, algebra and calculus. In the most simple manner, you can do constructions including points, vectors, segments, lines, and conic sections as well as functions, which can be altered dynamically by mouse afterwards. On the other hand, also the direct input in school-notation like g: 3x + 4y = 7 or c: (x 2)2 + (y 3)2 = 25 is possible, and a range of commands including differentiation and integration are at your disposal. The most remarkable feature of GeoGebra is the dual view of objects: every expression in the algebra window corresponds to an object in the geometry window and vice versa.