"The power of Twitter resides in the kind of connections and networks it allows you to make.Twitter is by far the social networking platform that teachers and educators populate the most. As such, creating a personal/professional learning network comprising kindred others is as easy as participating in the weekly educational chats organized on Twitter (#edchat as an example). These meet-ups enable you to meet and connect with teachers from all around the globe. They also introduce you to a treasure trove of information, resources, links, tips, and learning experiences that can be leveraged for your own purposes."
Via John Evans