Edmodo
1. Edmodo is a secure social learning network for teachers and students. Sharing information in real time. http://www.edmodo.com/
2. View following youtube video that explains what Edmodo is:
http://www.youtube.com/watch?v=mtFOPNK28Sc
http://www.youtube.com/watch?v=nHtwgZEHzNs
and http://www.youtube.com/watch?v=uc5wEdGpxi4