"Google+ / Google Hangouts: Google+ can be used similarly to Facebook, but using circles can address some of the privacy issues potentially raised with Facebook. While neither of us uses Google+ extensively in our teaching, Google Hangouts have proven invaluable for synchronous engagement. The drawback of Hangouts being limited to 10 simultaneous video feeds can be addressed by having groups of learners (with or without a teacher) act as a roundtable with a backchannel on Twitter or in the chat box inside the Hangout."
