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

To Help Students Discover Mathematical Relationships or Theorems
   Explains how to teachers can help students use software to discover new math theorems. Page includes example photos and list of applications for this procedure.
   http://coe.sdsu.edu/EDTEC640/POPsamples/pyoung/pyoung.htm