This paper describes a methodology for the analysis of classroom talk, called sociocultural discourse analysis, which focuses on the use of language as a social mode of thinking ñ a tool for teaching-and-learning, constructing knowledge, creating joint understanding and tackling problems collaboratively. It has been used in a series
of school-based research projects in the UK and elsewhere and its use is illustrated with data from those projects. The methodology is expressly based on sociocultural theory and, in particular, on the Vygotskian conception of language as both a cultural and a psychological tool. Its application involves a combination of qualitative and quantitative methods and enables the study of both educational processes and learning outcomes.
Pupil talk and discussion are seen as having important social and cognitive outcomes. In science classes, pupils' collaborative talk supports the construction of meaning and helps examine the status of evidence, theory and knowledge. However, pupil interactive talk in groups is rare in science lessons. The research reported is part of a project to increase the amount of pupil-pupil talk in primary schools through a programme of teaching and professional development.