An excellent resource with the answers to many questions about math assignments.

A kid and his dad have built a useful list of homework helping websites. Winner of 90+ awards, this site deserves them. We'd give it a "10" on our list of 10 great homework sites.

Homework Companion provides quick access to an encyclopedia, dictionary, and thesaurus; plus help on all subject areas.

Internet Public Library is a general reference site.  To log on to homework help, go to "Youth" and select the category of your choice.

This site is geared toward older students, grades 7 and up.  Younger students might want to try KidsClick.