Lots of great sites for math!
ABCya!: check with mom... she may want to have you work on something special
NumberNut: This one goes over topics AND has games and activities to help practice your math skills
Nickelsburg: Learn more about money & practice using money
MathUSee: Use this drill sheet to help speed up
MathPlayground: More fun games! Check to see what mom wants you to work on!
Mr Nussbaum's: Lots more math games! Check with mom or dad before you start the games... some include references to things we want to keep clear of our minds, ok?
MathBlaster: Math games that are 'out of this world!'
Khan Academy: Math lectures and practice. Also test taking practice.