The following websites offer a great resource for extended learning, practice, or research. Check them out!
http://www.softschools.com/
http://www.scholastic.com/
http://www.eduplace.com/
http://www.aaa.math.com/
http://www.algebra.com/
www.math.about.com/od/prealgebra_concepts_help.htm
http://www.tweenparenting.com/
www.ipl.org/di
http://kids.yahoo.com/