Google Hangouts

Have you tried google hangouts? It's a great tool allowing 10 people to video conference. Currently at work instructors have inquired about how to create some good old group interaction between students and this might do the trick. With the new tool with google plus hangouts on air, the ability to record the sessions is now possible to share with the instructor.

What I found was the hangouts application wasn't just restricted to the computer. You are also able to use the ipad and iphone or any other iOS device to contribute as well.

There are also additional tools like screen-sharing where you are able to share parts of your screen to the group. There is also a sketchpad application where you can draw and make diagrams to show to the rest of the group.

Overall this seems like a pretty powerful tool for both instructors and students to use for collaboration or office hours.