Do you have a group of students on clinical rotation away from the classroom? Twitter can be an effective system to let them communicate with each other and with you while they’re away from class. Not only will it work on a computer connected to the internet but it can also work on cell phones. Here is an article from US News on Twitter, http://www.usnews.com/articles/education/2009/06/02/twitter-goes-to-college.html
Just found another good link on getting started with Twitter http://www.slideshare.net/janehart/twitter-workshop-1604109?type=presentation
From Jane Hart’s Centre for Learning & Performance Technologies, http://www.c4lpt.co.uk/handbook/twitter.html