Discusses using Alan Bell's "Principles for the Design of Teaching" with student teachers. Discusses choosing genuine and substantial mathematical activities, exposing and resolving cognitive conflict, using flexible tasks in which the degree of challenge can be adjusted or a single starting point can develop into multiple tasks, using feedback,…

The purpose of this paper is to contribute to the debate about how to tackle the issue of "the teacher in the teaching/learning process", and to propose a methodology for analysing the teacher's activity in the classroom, based on concepts used in the fields of the didactics of mathematics as well as in cognitive ergonomics. This…