Twitter is a social networking site that is open for everyone to exchange and post short comments or status updates. It only allows for 140 characters and if you are going to use it for class discussions, you need to make sure you mark who you are responding to and use a special set of rules if you don’t reply right away, which limits the size of the actual response. Blackboard discussion on the other side is limited only to student enrolled in a particular class but it allows posting much longer responses and having an actual elaborated debate on the topic. Additionally, it is easier to follow the discussion and see which posts drive most of the commentary. I definitely think Blackboard is more appropriate and user friendly for educational purposes, but nothing compares to the in-class discussion with on the spot responses, emotions and gestures, where the whole class can participate at once and hear every voice.
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