1. Bradley, J. (ed.) (2003) The Open Classroom: Distance Learning In and Out of Schools. Kogan Page, London.
2. Clark, T. (2001) Virtual Schools, Trends and Issues. Report commissioned by the Distance Learning Resource Network, a WestEd Project. [online] http://www.dlrn.org/trends.html
3. Cobb, P., McClain, K., Lamberg, T., and Dean, C. (2003) Situating teachers instructional practices in the institutional setting of the school district. Educational Researcher, 32, 13–24.
4. Davis, N. E., Niederhauser, D. S., Compton, L., and Lindstrom, D. (eds.) (2005) Good practice to inform Iowa Learning Online. [online] http://projects.educ.iastate.edu:16080/~vhs/index.htm
5. Engeström, Y. (1998) Reorganising the motivational sphere of classroom culture: An activity theoretical analysis of planning in a teacher team. In The Culture of the Mathematics Classroom, F. Seeger, J. Voight, and U. Washescio (eds.), Cambridge University Press, New York, pp. 76–103.