Pleasanton JR/SR High School

This site has access to over 20,000 websites and is very thorough - it's an excellent resource for all grade levels.

This site is best known for math but is also good for science and has added art history. It contains videos for all levels.

Get help with math at all levels even provides homework help

Internet Resources on Citation

Great site for spelling and vocabulary primarily for elementary

A comprehensive site of all disciplines and levels

This is a fact-finding site, probably best for junior high/high school