An internet search engine just for kids. When you get to it, make sure to check out the links to "Schoolhouse" and to "Answers". You'll find a ton of information that will help you with your homework. The Answers section is pretty cool - it has a lot of real questions, and then gives short and accurate answers.
There's a section with images, too.
Fact Monster (from Information Please)
Very complete site, covering the world, the U.S., people, sports, science, math & money, words, and more. Has a special homework center, an almanac, an atlas, a dictionary and encyclopedia. There are games and quizzes to. Check it out!
A GREAT site - lots of links. Choose your path - one path for grades K-5, one for grades 6-8. Once you choose your path, there are links to help with math, science, social studies, government site, health and fitness sites and more.