Math mysteries http://teacher.scholastic.com/maven/
Math activities http://www.coolmath4kids.com
Practice your math http://www.eduplace.com/kids/mhm/index.html?x=68&y=32
Brain teasers to make you think http://www.eduplace.com/math/brain/index.html
Solve mysteries that are fun http://www.superthinkers.com
Math games http://www.aplusmath.com/Games/index.html
Games to try http://pbskids.org/cyberchase/games.html
Math flashcards http://www.aplusmath.com/Flashcards/
Fractions http://www.aaamath.com/fra.html
Basic facts practice for addition and subtraction - scroll down to the second of the the two activities listed http://www.saxonhomeschool.com/activities/basicfacts/index.jsp
Make a picture with pattern blocks http://ejad.best.vwh.net/java/patterns/patterns_j.shtml
Practice with counting money-you will be asked to load Shockwave (free). If you click on the index button it will take you to more games. http://www.little-g.com/shockwave/cents.html