What is Twitter?
Twitter is for staying in touch and keeping up with friends, colleagues, and current events, no matter where you are or what you're doing. For some friends or events you might want instant mobile updates for others, you can just check the web. Invite your friends to Twitter and decide how connected you want you to be.
During the recent Earthquake and California Wild Fires Followers Set Twitter Ablaze: "Twitter users Nate Ritter and Viss have been busy posting rapid-fire updates of the current wildfire situation in Southern California. Both of them are on the scene in San Diego, and they are doing an excellent job of providing information and news about evacuations, meeting points and anything important that local residents would need to know."
Quite simply: There is nothing more important to teach educators (and the rest of us) about technology, than how to network.
Putting out a fire? Escaping an Earthquake? Planning a class? meeting? Lunch? Conference? and need to be able to update (and update your site?) and be updated via your mobile device? Twitter is how you can do so.