Math Dictionary http://www.teachers.ash.org.au/jeather/maths/dictionary.html
Virtual Manuipulatives http://matti.usu.edu/nlvm/nav/index.html
Math problems, games and articles http://nrich.maths.org/public/index.php
Interactive games http://www.multiplication.com/interactive_games.htm
SUBTRACING INTEGERS Interactive game that works on subtracting positive and negative integers.
ADDING INTEGERS Interactive game that works on adding positive and negative integers.
http://www.coolmath.com/home.htm
http://www.mathleague.com/help/help.htm
http://www.math.com/students/homework.html
http://www.webmath.com/
http://www.visualfractions.com/
This website offers tutorials and practice quizzes based on the Washington State GLE's. There is limited access to this site for free, or you can purchase a package deal that will give you more. It will also keep track of progress and report it back to you. http://www.quizmine.com
This website offers hint-step explanantions for the actual odd-numbered problems in most textbooks. I am not sure if it contains CMP materials but it is worth a look for the Pre-Algebra student. This site does charge a fee. http://www.hotmath.com