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Published online by Cambridge University Press: 05 January 2011
1 For an account of task-based learning communities and the view of learning which underpins them, see Riel, M. and Polin, L, ‘Online Learning Communities: Common Ground and Critical Differences in Designing Technical Environments’, in Designing for Virtual Communities in the Service of Learning. Edited by S. A. Barab, R. Kling and J. H. Gray Cambridge: Cambridge University Press, 2004 pp. 16–50.