7 Fantastic Free Social Media Tools for Teachers

Today from Mashable, 7 Fantastic Free Social Media Tools for Teachers.

The possibilities for social media tools in the classroom are vast. In the hands of the right teacher, they can be used to engage students in creative ways, encourage collaboration and inspire discussion among even soft-spoken students. But we’ve already made our case for why teachers should consider using social media in their classrooms. What about the how?

What fantastic tools are you using?