Here's a collection of websites you might find useful when you need help with a homework assignment.
BJ Pinchbeck's Homework Helper
Another extensive list of websites that you might find helpful.
Homework Spot
Yet another collection of links divided into subjects and topics.
Ask Dr. Universe
This site provides answers to many different questions submitted by site visitors. Ask Dr. Universe is supported through Washington State University.
How Stuff Works Express
Check out this special edition of the HowStuffWorks website geared to students.
Fact Monster Homework Help
Find useful information by subject area, tips to improve your note-taking and study skills, and ways to improve upon your writing techniques.
Chemistry:
WebElements Periodic Table
The periodic table on the World Wide Web.
Government & History:
The Avalon Project
This collection of digital documents covers history, politics, government, and law.
Math:
WebMath
Check your homework or read through examples of how to solve problems from adding fractions in pre-algebra to figuring derivatives in calculus.