Social Media is a great way to connect, share, learn and communicate with other educators and with students and parents. Teachers can hold online study sessions, discussions, post assignments and resources, and communicate with students and parents about class issues and information. Schools can use social media to connect with parents and the community and communicate with staff and students.
Facebook is one social network that schools and teachers use with their students, when it isn't blocked by the school filtering software! Our school district has a Facebook page, but blocks Facebook on the school network.
There are a lot of great ways to use Facebook in the classroom and here are 100 Ways Teachers Can Use Facebook in the Classroom. There are some great ideas here.
Related:
Social Media in Education - connect, share, learn, communicate and more
Twitter, Google Plus, Facebook - a nice comparison
Edmodo - excellent, free, social network and educational system
5 Great course management resources for educators
Google Groups - connect, share, communicate, discuss - great for education
Which Social Network should you use? Infographic on which to use when
Twitter - A great resource for Education
Google+ - more reasons it's great for educators
Twitter, Facebook, RSS feeds, Email, Google+ - why/when I use each one