FCAT practice http://www.fcatexplorer.com/
Brainchild Brainchild is an online assessment that is very useful for test-taking practice. Click on any state to take that state's standardized test. http://www.brainchild.com/gen/usmap.asp
White House for Kids http://www.whitehouse.gov/kids/whlife/index.html
National Geographic for Kids http://www.nationalgeographic.com/kids/
DISCOVERY KIDS http://www.discoverykids.com
TIME FOR KIDS http://www.timeforkids.com
4th Grade Practice Skills http://www.internet4classrooms.com/skills_4th.htm