Check out each tile for a link to a great math resource. This site can be finicky, so check-back later if it's not successful. Some sites I really like are Khan Academy, Math Antics, and PBS Math Club.
This is a GREAT interactive website that allows you to compete against others in the "web world" in a variety of timed multiplication games. Choose "multiplication" from the menu at the top of the screen. Perfect for students that need extra practice on their times tables.