This website offers a wide variety of written and verbal definitions and explanations of mathematics terms. It also helps users browse through it by letting you select the grade level you are in.
As it name indicate this is a website that help teachers and parents teach their kids multiplication through the use of interactive tables, games, and puzzles.
Motion Math designs challenging math games to sharpen your kids mathematical wits. It also has a mobile version to install on your iPad.
7- Buzz Math