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Ok, so what is Twitter and why should you care?  First, let's start with what it isn't.  Twitter is *not* about micro-blogging.  Yes, it is described this way - yes even by it's founders.  But they have also admittedly publicly that much of the innovation on Twitter has happened in the user base - the convention for retweets (RT), for example, came from the user base.  For those of you who are new, RT is just a way to a convention for sharing a message from someone you follow to your own followers.  It's sort of citation plus recommendation plus message all wrapped in a little two letter acronym.

3 key reasons Twitter is essential for teachers

Great post about the power of Twitter. It is almost so commonplace as to be trite. But it isn't trite. It is a very real part of a good teacher's PLN. Better than a search engine, the people engine of a giving, helpful group of twitters. But remember that in order to Tweet and receive, you also have to share and receive. You get back far more than you give but you should give not just ask. In short, be there for your tweeps and your tweeps will be there for you.