A+ Math - practice worksheets http://www.aplusmath.com
Lots of practice with every math topic - Pick a grade level and then a topic http://www.aaamath.com
Tangram Games http://pbskids.org/cyberchase/games/area/tangram.html
Interactive Math Games http://nlvm.usu.edu/en/nav/vlibrary.html
Fun Brain - math games http://www.funbrain.com
Interactive Math-Click on the link for the subject and scroll to the lesson topic http://www.coolmath.com
Type in the problem - get help with solution http://www.bagatrix.com/
NASA for middle-school students - a random site I like http://www.nasa.gov/audience/forstudents/5-8/features/index.html
National Geographic for Kids - just a random site I like http://www.nationalgeographic.com/kids/
Oklahoma PASS Skills - study for the CRT http://sde.state.ok.us/curriculum/curriculumdiv/standards/default.html
Testing Requirements for the CRT http://sde.state.ok.us/curriculum/ACE/Testing.html