Listed below are some other sites that you may find useful.
For those fortunate enough to be in San Jose this free online tutoring service can be accessed by those with a San Jose Public Library card. http://www.sjpl.org/tutor
If you are a middle school student in New York City then you can have a look at Top Honors as they offer free math tutoring. http://www.tophonors.org/
And for residents of Alabama - Online Homework Help
Free homework help and tutoring. 3rd through 12th grades.
In San Diego at http://www.sandiego.gov/public-library/
through the Public Library system. Uses tutor.com and is funded by local businesses. Click on the Live Homework Help icon on the library homepage. A San Diego library card is required.
In B.C., Canada - LearnNowBC provides free access to online tutors via a chat room. Available to B.C. students.
Ask Dr. Math - http://mathforum.org/dr.math/
Questions can viewed in the archive alongside the responses. Questions are categorized at the Elementary School, Middle School, and High School levels. You can also post questions and receive a e-mail response for questions that have not already been answered in the archive
Once you have registered you can post questions and view the archive of previous answered ones. Archive can be searched by keyword and it is categorized at K-5 Elementary, 5-8 Middle School, 9-10, and 11-12 High School levels.