http://www.coolmath.com/index.html


http://www.naturalmath.com/


http://mathforum.org/dr.math/


http://www.mathstories.com/


http://www.multiplication.com/


http://school.discovery.com/homeworkhelp/webmath/


http://www.aplusmath.com/


http://www.allmath.com/

Here are a few more...


Math glossary...

http://www.harcourtschool.com/glossary/math/glossary3.html



Hands-on math...

http://www.xmission.com/~dparker/mathpage/handson.html



Curious and Useful math...

http://personal.cfw.com/~clayford/

Thanks for posting those. Some of the kids I work with have trouble with math and I needed some fresh ideas for them.