31 Sheryl Nussbaum Beach 2007 The Art of Building Virtual Community <p>In a post to her 21st Century Learning blog (cross-posted at TechLearning) TLN member and classroom 2.0 guru Sheryl Nussbaum Beach discusses the art of building virtual community, sharing several different participation models and discussing the features of a healthy community.</p> http://21stcenturylearning.typepad.com/blog/2007/08/the-art-of-buil.html