1. National competency framework for beginning teachers. National project on the quality of teaching and learning,1996
2. Language in the secondary classroom;Barnes,1969
3. Taxonomy of educational objectives. Handbook 1: Cognitive domain;Bloom,1956
4. The structure of discourse in collaborative learning;Chinn;The Journal of Experimental Education,2000
5. Restructuring the classroom: Conditions for productive small groups;Cohen;Review of Educational Research,1994