I have become mildly obsessed with Twitter - in part because it's exasperating - I can see a lot of use cases to do with getting the message out, eg York's use of twitter for system status messages - but they all turn into sand because of the inanity, spam and general irrelevance of much of the content on twitter.
However there's also been a thread of people trying to make the classroom experience (or perhaps even more the virtual classroom experience) better by providing ways for students to interact, for example there's Wild, and also a piece in the Chronicle of Higher Education about someone using twitter for classroom interaction.
All good, but why not use some inhouse micro blogging service, or in the case of online learning a chat and post facility ? Can it only be because of the hold twitter has on the group mind?
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