| − | --[[Benutzer:Novak|Novak]] 14:13, 18. Nov. 2009 (UTC)
| + | Mathematics visualization software<ref>http://www.dynamicgeometry.com</ref> for students at all levels, from third grade through college. The software aims at providing a tangible, visual way to learn mathematics and increasing student's engagement, understanding, and achievement. <ref>http://www.keycurriculum.com</ref> |