Abstract
This article proposes a theoretical reflection on the articulation between teachers’ conceptions of particular knowledge objects on the one hand, and their professional action about these objects on the other. We will illustrate our point through two studies carried out in France and in Quebec in the field of the teaching of socially acute questions (SAQs). The first study focuses on the link between the social representations (Abric, 1994) of sustainable development (SD) among future teachers of humanities and natural sciences and their practices with regard to education for sustainable development (ESD).The second study focuses on the relationship between a science teacher’s knowledge about the natural sciences (NS) as an object of knowledge and as an object of instruc tion. In order to enrich our reflection, we present an original operationalization of the concept of teaching practices, whose different dimensions (finalized, technical, interactive, affective) are put in relation with the concepts of social representations and relationships to knowledges. This perspective and theoretical reflection allows us to identify crossings and tensions between beliefs and teaching practices with regard to the SAQs in reference to the transformative-sociocritical and transmissive-positivist approaches of ESD.