Skype is fantastic for online tutoring, chris1234. It's free with a simple download. I'd also recommend a good headset with mic, which are relatively inexpensive. I also recommend the Wacom Tablet, especially for math. Elluminate offers free whiteboard along with conferencing.

http://www.wacom.com/index2.php
http://www.elluminate.com/

Daa'iyah Na'im
Director/Head of School
The AGVI Academy for Gifted Youth
http://AGVIgifted.org