GeoGebra

GeoGebra is an interactive geometry, algebra, and calculus application, intended for teachers and students.

If you are a maths or science teacher, GeoGebra is an excellent and very flexible tool that will allow you and your students to create constructions with points, vectors, lines, functions and explore a wealth of issues in relation to geometry, algebra and calculus.

You can download and use GeoGebra for free. It is written in Java and thus available for multiple platforms. You need not download and install it on your own computer; it can also be run as an online application directly from the GeoGebra site.

Links:

• http://www.geogebra.org/ (official documentation and download site)
• http://mathandmultimedia.com/geogebra/ (tutorials)

On the web you may also find very complex and useful GeoGebra examples such as e.g. the one on the box-folding problem:

• The Box-Folding Problem