FunBrain -- http://www.funbrain.com/
Teachers, parents and students are all welcome at FunBrain, which creates a community of learning for elementary and middle school kids. Play brain-teaser games that are suited to different grade levels, or take a test posted by your own teacher.

Yahooligans! School Bell -- http://www.yahooligans.com/School_Bell/
Use the familiar Yahoo directory style to find homework help in the subjects that give most students problems, including math, science and literature.

BJ Pinchback's Homework Helper --http://school.discovery.com/homeworkhelp/bjpinchbeck/
This site, started by a student and his father in 1996, is now part of the educational arm of Discovery.com. It's an excellent collection of homework-help sites, augmented by content from the Discovery Web site.

Schoolwork.ugh -- http://www.schoolwork.org
The name may be a terrible pun, but the site itself is cool. Schoolwork.ugh includes links to information on the Net for common homework topics and includes a built-in search engine.

BrainMania -- http://www.brainmania.com/
Got a question? Get it answered here. Post a question, and one of the site's volunteers will get back to you within 24 hours. You can also post questions in an open forum. And if you're an expert in something, the site's looking for volunteers.

PinkMonkey -- http://www.pinkmonkey.com
Houston-based PinkMonkey aims to be a hip Cliff's Notes, with chapter summaries of hundreds of books available for free online. You'll also find an online SAT study guide and the complete texts of more than 2,000 classics and historical documents.

High School Hub -- http://www.highschoolhub.org
High school homework is hard, and this site offers help geared toward a high level of difficulty. Check out the study guides for such topics as biology, various languages or U.S. history. There's also a new sample SAT test question each day.

Homeworkhelp.com -- http://www.homeworkhelp.com/
Need help boning up on a particular topic? Homeworkhelp.com offers mini-tutorials -- some with snazzy multimedia content -- on some of the toughest subjects.

HomeworkNOW -- http://www.homeworknow.com/
Tell your teacher about HomeworkNOW, a site that lets teachers post their homework assignments on a daily basis. It's a great resource for schools that don't have their own Web sites yet.

Big Chalk -- http://www.bigchalk.com
Here schools can build their own online communities and use them for homework help. There are separate areas for parents, children, teachers and school librarians.