Greenhaus Education and Other "Effects"

As I mentioned in my previous post I have been working on a draft of my literature review, much of which focuses on online professional development.  Online learning communities are a big part of what I have been reading about, and, as I have been involved in many online communities myself through online courses and chat forums, it got me thinking about what exactly constitutes and online learning community.  Specifically, can Twitter be considered an online learning community?  Why Twitter you ask?  Probably because I have recently delved into Twitter myself ( @vpigreenie ) and am slowly learning how to navigate this social media tool. Definition from Wikipedia : An online learning community is a public or private destination on the Internet that addresses the learning needs of its members by facilitating peer-to-peer learning. ......... In an online learning community, people share knowledge via textual discussion (synchronous or asynchronous), audio, vid...