Khan Academy:
This website is especially useful for review and practice at home.  We watch the videos in class but the students can always review the videos and work on the practice problems at home!  Create and FREE account with your child and you can monitor their progress throughout the lessons.

Math Antics:

This website offers loads of great and entertaining videos that students can use to review and practice at home.

Math Playground:
Play the games related to fractions/decimals/percents