1. Abboud-Blanchard, M., Cazes, C., & Vandebrouck, F. (2007). Teachers’ activity in exercises-based lessons: Some case studies. In D. Pitta- Pantazi, & G. Philippou (Eds.), Proceedings of the Fifth Congress of the European Society for Research in Mathematics Education (pp. 1827–1836). Cyprus: University of Cyprus.
2. Bartolini Bussi, M. G. (1998). Verbal interaction in the mathematics classroom: A Vygotskian analysis. In H. Steinbring, M. G. Bartolini Bussi, & A. Sierpinska (Eds.), Language and communication in the mathematics classroom (pp. 65–84). Reston, VA: National Council of Teachers of Mathematics.
3. Boaler, J., & Wiliam, D. (2001). ‘We’ve still got to learn!’ Student’s perspectives on ability grouping and mathematical achievement. In P. Gates (Ed.), Issues in mathematics teaching (pp. 77–92). London: Routledge.
4. Chazan, D. (2000). Beyond formulas in mathematics and teaching: Dynamics of the high school algebra classroom. New York: Teacher’s College Press.
5. Christiansen, B., & Walther, G. (1986). Task and activity. In B. Christiansen, B. Howson, & M. Otte (Eds.), Perspectives on mathematics education (pp. 243–307). Dordrecht: Reidel.