1. Problem-based learning: an approach to medical education;Barrows,1980
2. Classroom discourse;Cazden,1986
3. Quantifying qualitative analyses of verbal data;Chi;Journal of the Learning Sciences,1997
4. The structure of discussions that promote reasoning;Chinn;Teachers College Record,2000
5. Constructivist, emergent, and sociocultural perspectives in the context of developmental research;Cobb;Educational Psychologist,1996