Common knowledge : the development of understanding in the classroom / Derek Edwards and Neil Mercer. Edwards, Derek. Mercer, Neil. Communication in education Great Britain Case studies. Interaction analysis in education Case studies. Comprehension Case studies. LB1033 .E33 1987 370.15 19 EDC Includes index. Bibliography: p. [182]-187. New York : Methuen, 1987. 1987. 1987 Text x, 193 p. ; eng Great Britain