Ask Dr. Math, answers to elementary school level math.
http://mathforum.org/dr.math/drmath.elem.html

Ask Dr. Math, answers to middle school level math.
http://mathforum.org/dr.math/drmath.middle.html

This is a help resource for 4th through 8th grades.
http://www.mathleague.com/help/help.htm
http://www.teachrkids.com/
http://www.allmath.com/
http://www.coolmath4kids.com
http://now2000.com/kids/science.shtml

Logical thinking skills.
http://www.syvum.com/iq/

Brain teasers for grades 3 through 8.
http://www.eduplace.com/math/brain/index.html
http://www.coolmath4kids.com
http://www.edbydesign.com/kidsact.html
http://www.kidsdomain.com/games/math1.html

Flashcards for kids at different levels of math.
http://www.aplusmath.com/Flashcards/
http://www.factmonster.com/math/flashcards.html

September 2008