Twitter in the Classroom

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What is Twitter?
Twitter Shorthand
Retweet/Via (RT or via)- The indication at the beginning or end of a tweet that is using text of someone's head. Basically being cited by other tweeters. Some use via when original texts of tweets are altered.
Hashtags (#) - Tagging individual tweets so they show up in a "stream" ex. #COMM200 or #Educause2010 
@ replies/ mentions - when you send a message directed to a particular users. Usually a reply to a tweet or if you want to send something to the "attention" of other twitter users.
Direct Message(DM) a private message that does not appear in a twitter timeline
Twitter Lists - A new feature that has not been launched to all users yet. allows you to organizer people you follow in particular lists. Some third party products already have this feature (brizzly and tweetdeck)

Who uses Twitter?
Portrait of a Twitter user (Pew Internet & American Life Project)

How can you use Twitter in the classroom?

Pushing content
Vital tools
Managing Twitter
Evaluating new people to follow
Other uses for Twitter
Benefits of Twitter
Negatives of Twitter
Additional Reading
101 ways to use Twitter in the Classroom
NC State Twitter Aggregator
Twitter in Higher Education Tony McNeil
Essential follows:
Subject specific follows
Mashable Mega Twitter Lists and resources
10 high fliers on Twitter