WiZiQ

If you don’t have money to spend and still want to have an interactive online class with audio, video and a shared whiteboard, take a look at WiZIQ.

Membership is free and there is no software to install.  Once you have an account, you can invite other members to your sessions.  Each session can be archived for future review.

Another nice feature is the “public session”.  This is a session open to anyone interested in joining.  All sessions (public or private) are tagged with key words.  You can search for archived sessions from other users based on these tags. 

Over time, these archives could be a great resource in and of themselves.