K-12 Internet Geometry Resources

Also see the Math Forum's Internet Mathematics Library: Geometry.

Classroom materials for teachers and students
Selected geometry Internet resources for the classroom including lesson plans, activities, and interactive resources.
Software for geometry
Publicly available software and publishers online.
Interactive geometry classroom resources
Archives of sketches, scripts, and macros for The Geometer's Sketchpad, Cabri Geometry, and other interactive geometry software. Demo versions available too.
Internet projects
Activities for students and lovers of geometry.
Selected geometry elsewhere on the Internet
A list of exceptionally good K-12 geometry sites.
Public forums for discussing geometry
Mailing lists and newsgroups sponsored by the Forum and others where mathematicians,teachers, and students trade ideas about geometry: sci.math, math-teach, ednet, history of math, geometry- newsgroups.