Learning that happened within the long-lasting communities seemed the most profound. Members of a community are informally bound by what they do together and by what they have learned through their mutual engagement in these activities (Wenger, 1998). Participants in our case studies reported a strong identity around a common agenda or area for learning. In this way, shared learning and interest of the members, together with a shared social and historical context, keep the community together (Galley, et al., 2012).