"10 top uses of Twitter for education:
1. ‘Twit Board’ Notify students of changes to course content, schedules, venues or other important information.
2. ‘Summing Up’ Ask students to read an article or chapter and then post their brief summary or précis of the key point(s). A limit of 140 characters demands a lot of academic discipline.
3. ‘Twit Links’ Share a hyperlink – a directed task for students – each is required to regularly share one new hyperlink of to useful site they have found."
Learning with 'e's: Teaching with Twitter
Learning with 'e's: Teaching with Twitter: