Robert Pondiscio started a great discussion on Twitter [https://www.coffeeonthekeyboard.com/tag/twitter] in the classroom over on The Core Knowledge Blog [http://www.coreknowledge.org/blog/2009/06/29/the-twitter-challenge/]. In particular, I’m interested in one of his comments [http://www.coreknowledge.org/blog/2009/06/29/