Algebra.com's tutoring system is explained here. This page exists to explain how the system works and help tutors perform their tasks.
I have a unique system where any intelligent person could solve problems submitted by students. These answers will stay public forever, in the relevant algebra modules.
Algebra.com's tutors can use a formula plotting system to easily create beautiful math formulas in their explanation, draw cartoons etc.
After receiving an answer, students send thank you notes, where they can say thank you or even solicit paid help.