If you are looking to teach online there's a new site called http://beta.ilumii.com
that allows you to be an online teacher. I've tried it with some success although the site has just started and its very new, I like it more because it offers many features that the other sites like WizIQ and edufire don't offer.
The best part about this site is that you can teach up to 3 students at a time, so, all of a sudden your income can go from 20/30 dollars a lesson to 60 to 90 depending on what you charge and how many students you can get.
This site has awesome tools, you can schedule tutorials, lesson packages, invite students, and so on. The best part is that if a student accepts an invitation to study and they don't show up, you still get paid.
Anyways, if you want to check it out you can sign up for the Free Trial version at http://beta.ilumii.com