Educators can use social media sites for a multitude of educational resources and forums. Educators can use social media as a bridge to connect to their students and show they each have a common ground. Educators can use social networking for assignments such as web quests and Wiki's.
I belong to other social networks such as Pinterest and Google+, but will most likely not use these within the classroom.
I would however potentially consider a classroom facebook group, but most school wifis do ot allow for this social media.