1. Askew, M. (2004). Objectives driven lessons in primary schools; cart before the horse? In O. McNamara (Ed.), Proceedings of the British Society for Research into Learning Mathematics, (Vol. 24(1), pp. 61–68). London: BSRLM
2. Ball, D. (1991). Shea Numbers (a video package). East Lancing MI: Math Project, Michigan State University.
3. Brousseau, G. (1997). Theory of didactical situations in mathematics. Dortrecht: Kluwer.
4. Brown, S., & McIntyre, D. (1993). Making sense of teaching. Buckingham: Open University Press.
5. Calderhead, J. (1984). Teachers’ classroom decision making. London: Holt.