How I Use It
I use Twitter as "Exit Tickets" and I also post exceptional student work. When I come across interesting articles I throw them up on the news feed and have a back channel going. I eventually want to implement the back channel into my lessons, however, that is taking some tweaking.
I love using Twitter for "Exit Tickets." It FORCES the students to summarize their thoughts and knowledge over the information to the limited amount of characters. Twitter is easy to use and most students already have an account.