PLOS Biology An Introduction to Social Media for Scientists: Research article by Holly M. Bik and Miriam C. Goldstein.
Teaching Crowds: Learning and Social Media by Jon Dron & Terry Anderson from Athabasca University – free .pdf download of textbook whole book or by chapter
Ning (build your own community) home page
Piazza online question and answer platform home page
Twitter for Beginners (6:18 minute video)
Twitter sign up site