Edmodo is a network specifically built for teachers and students, connecting them at a class, school or even a global level.
Edmodo in Action - help guide for teachers. Check out their Edmodo In Action videos to see how Edmodo can be used in your classroom. Choose between subject area examples, feature/how-to videos or learn more about their school and district features.
"In a nutshell, I see Edmodo as an all encompassing classroom management/teaching and learning/collaboration system. Blogging, on the other hand, while it can be used for all the purposes just mentioned, is a tool for writing, publishing and sharing your body of work, be it major writing tasks or quick reflections on life or school work. While it aims to share and craves feedback, blogging is a personal tool. Edmodo, however, is more group oriented. Because of the differentiation between the two, I think they should both be part of classroom practice." From Mr G online.