Webmath
http://www.webmath.com/
Pick the type of problem you need help with and fill in the form and then see and read the step by step instructions. 

Math.com
http://www.math.com/
Start with the "Homework Help" tab and then scroll down BELOW the many ads.  Find a list of topics that you can explore by level: First Glance, In Depth, Examples and Workout.

Ask Dr. Math (Middle School)
http://mathforum.org/dr.math/drmath.middle.html
An excellent resource with the answers to many middle schoolers' questions about math assignments. If you don't find your answer here, ask Dr. Math!

The Math Forum
http://www.mathforum.com/math.topics.html
A site that guides you to the best Internet math resources - for all ages up through colleges.  Besides the usual math explanations it includes links to software, discussion groups, projects  and resources for educators.

Last Updated: 02/01/2010 grr