http://mathforum.org/dr.math/
Ask Dr. Math - answers to many math questions

http://www.edu4kids.com
Education4Kids - provides free access to educational drills and games

http://www.funbrain.com
Educational games by the Family Education Network

http://homeworkhelp.about.com
Homework help and study tips

Homework Help

www.kidinfo.com
Homework and reference site, recommended by the American Library Association

www.yahooligans.com
Homework and reference site for kids by Yahoo

http://ajkids.com
Ask Jeeves for kids - fast, easy and kid-friendly way for kids to find answers to questions

Reference

http://dictionary.com
Online dictionary and thesaurus

http://awesomelibrary.org/student.html
Online library for kids

http://www.wilmette.lib.il.us
Wilmette public library website

Religion

http://wwwcatholicyouthonline.org
Catholic Youth Online site