Education

E-Z Geometry
For high school teachers and students. Products include an interactive textbook, class video clips, projects, glossary, and resource links.
http://www.e-zgeometry.com/

Pi Day
Activities for a Pi Day, March 14 (3.14) celebration including pi math problems, history, songs, stories, and greetings.
http://mathforum.org/t2t/faq/faq.pi.html

Polyhedra: Learning by Building
Teaching project that let's students learn about polyhedra by using kite materials to create life size forms. Exercises include measuring surface area, volumes, and changing the form to simpler shapes.
http://www.math.umn.edu/~morgan/Triangles.html