Pros
Tutor.com provides online tutoring services over the Internet to U.S. military, school districts, libraries, and individuals. You can sign up to work specific hours. In this case your are paid full rate for tutoring and (I believe) half rate for waiting. You can also (this is what I do) just log on and be paid full rate for tutoring. In this second case you can start and stop whenever you like and do not need to plan ahead. I really like the flexibility. Tutoring sessions generally run from 10 - 40 minutes each.
Cons
First the students. Most of the students are wonderful. There is a mix of students needing help because they never learning the foundation material all the way to students in advanced classes who have been assigned a really challenging homework problem. However, some of the students are arrogant and nasty. This is a minority, but often more aggravation then I'd like for around $10 per hour. I'd most also mention that the U.S. military students seems to be uniformly polite and pleasure to deal with. Second is that Tutor.com has recently been acquired by IAC (Google them for a surprise). I have seen disconcerting changes since the IAC acquisition. The company is expanding rapidly both in subjects offered and new students. These new students seem to be more of the demanding, unappreciative type. It hasn't happened yet, but if the number of problem students increases, I may be forced to go elsewhere. IAC has brought other changes giving the feeling that the employees are viewed as an alternate source of revenue. For example, the good news is that we IAC there is now a retirement plan - actually pretty nice with 50% matching up to 6%. On the other hand, the plan is opt-out: you are automatically enrolled unless you opt-out.