1. Wellman, B., & Gulia, M. (1999). Net surfers don't ride alone. In B. Wellman (Ed.), Networks in the Global Village (pp. 331–366). Boulder, CO: Westview Press
2. Grossman, P., Wineburg, S., and Woolworth, S. (May, 2000). In pursuit of teacher community. Paper presented at the American Educational Research Association, New Orleans
3. Preece, J. (2000). Online communities: Designing usability, supporting sociability. Chichester, UK: John Wiley & Sons
4. Lave, J. (1993). Situating learning in communities of practice. In L. B. Resnick, J. M. Levine, & S. D. Teasley (Eds.), Perspectives on Socially Shared Cognition (pp. 17–36). Washington, DC: American Psychological Association
5. Lemke, J. (1997). Cognition, context, and learning: A social semiotic perspective. In D. Kirshner & J. A. Whitson (Eds.), Situated Cognition: Social, Semiotic, and Psychological Perspectives (pp. 37–56). Mahwah, NJ: Erlbaum