Building stories in order to reason and prove in mathematics class in primary school

As a part of a multidisciplinary research lead by a team from the S2HEP Laboratory, the aim of our work is to explore the potential functions of stories in Scientifics and Mathematics learning. In this paper we focus on the potential connections between the mathematical space and rhetoric space during problem solving activity. We first characterized theoretically, and then tested experimentally, thanks to a didactical engineering, a didactical environment. We characterise a processes transferring space between the narrative activity and the problem solving activity. Our results show that the narration act supports the student's mathematical reasoning.