Abstract
In this paper we employ three interpretations of the ZPD to frame an analysis of episodes of
teaching and learning in a year 7 mathematics classroom. The analysis is concerned with
the way authority is constituted locally by the teacher and students within the norms of
Collective Argumentation. In traditional classrooms, authority is assumed to reside in the
teacher and texts whereas in Collective Argumentation, authority is attained through discourse
practices that privilege socio-mathematical norms such as meaningfulness, communicability,
and testability. We show how students in the classroom speak with unusual authority as they
communicate and negotiate their claims.
Raymond A J Brown & Peter Renshaw
SPEAKING WITH AUTHORITY IN EPISODES OF MATHEMATICAL DISCOURSE