EJMT Abstract

The aim of this paper is to explore the potential of the Casyopée’s computer environment for the teaching and learning of functions at upper secondary level. We are particularly interested in the “student” side with a study of appropriate situations using Casyopée and their effects on learning functions. We propose an approach to functions via the functional modelling of geometrical dependencies. The proposed functional modelling cycle helped us to design learning situations, analyze and clarify students’ types of activities about functions. Therefore, our study showed how such an approach to functions in a geometrical setting can exist at upper secondary level thanks to the geometric and algebraic environments such as Casyopée.