K-12 Internet Algebra Resources

See also the Math Forum's Internet Mathematics Library: Basic Algebra.

Classroom materials for teachers and students
Selected algebra Internet resources for the classroom including lesson plans, activities, and interactive resources.
Software for algebra
Publicly available software and publishers online.
Internet projects
Activities for students and lovers of algebra.
Public forums for discussing algebra
Mailing lists and newsgroups sponsored by the Forum and others where mathematicians, teachers, and students trade ideas about algebra.