http://www.domath.org/
A popular math website for students and parents to explore games, activities, and general knowledge from basic math to calculus.

http://www.nctm.org/
National Council of Teachers of Mathematics website: Everything you wanted to know about mathematics, but were afraid to ask.

http://www.phschool.com/
The Pearson Prentice Hall website. Students in the 7th and 8th grade classes use Prentice Hall Course 2 and Prentice Hall Course 3 textbooks. Each lesson has online practice problems, activities, quizzes, and links connected directly to what they are learning in their textbook. These can be accessed using a web code found in each lesson of the textbook. To use a Web Code:

>Go to PHSchool.com.
>Enter a particular Web Code.
>Click on GO!