via http://education.zdnet.com/?p=2417 "Like Twitter, it’s a microblogging site, but it builds in significant additional functionality to support classroom interactions." "When you create an account, you designate yourself as a teacher or student. Teachers can create groups that students join when they create their accounts (students can join multiple groups and teachers can create and/or join multiple groups); when a group is created, the site generates a group code that must be entered to join. Then, messages, files, links, and assignments can be sent to whole groups."
Researchers Pam Mueller and Daniel M. Oppenheimer found that students remember more via taking notes longhand rather than on a laptop. It has to do with what happens when you're forced to slow down.
A. Burns, and B. Eltham. Proceedings of Communications Policy & Research Forum, page 298-310. Network Insight Institute, University of Technology, Sydney, (2009)