Need Help Finding a Tutor for 10th Grade Honors Geometry

WARNING -this blog post is IT Pro content-free.  

Do online tutoring services work for high-schoolers? For some subjects better than others? Can technologies like IM and shared IE sessions facilitate tutoring?

Where in the heck can I find a good tutor for my 10th grader on honors geometry? If you have suggestions, please leave comments.

Thanks in advance.