Arithmetic

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

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