Département de mathématiques et informatique, université de Rennes, 1987de Rennes, -1988 droits réservés. L'accès aux archives de la série « Publications mathématiques et informatiques de Rennes » implique l'accord avec les conditions générales d'utilisation (http://www.numdam.org/conditions). Toute utilisation commerciale ou impression systématique est constitutive d'une infraction pénale. Toute copie ou impression de ce fichier doit contenir la présente mention de copyright. Article numérisé dans le cadre du programme Numérisation de documents anciens mathématiques http://www.numdam.org/ UN PROCESSUS D'APPRENTISSAGE DU CONCEPT D'AIRE DE SURFACE PLANE <*> Exposé présenté le 18 novembre 1988 par Régine DOUADY Sous le titre "Ingénierie didactique à propos des mesures de surfaces planes à l'école élémentaire" ^ Cet article a été publié dans "Cahier de didactique des Mathématiques" de l'I.R.E.M. de Paris VII n° 37 de mai 1987 sous la signature de R. DOUADY et M.J. GLORIAN.
This article aims to discuss how the theory of didactical situations in mathematics (TDS1) can be used to answer research questions concerning regular teaching practices, production of resources for regular teaching, and teacher development. In the first part we focus on TDS and the way it may be a tool for the researcher to understand teaching practices and the way it may contribute to develop teaching practices, helping teachers identify questions useful for their practice. In the second part, we present analyses using TDS in two contexts in which researchers worked with teachers, making explicit or not the concepts they used. The third part approaches, from these two contexts, the way TDS may help the collaboration between researchers and teachers (or teacher educators), in research on teacher development, in particular in the case of producing resources helping teachers to prepare their class. The comparison of the two contexts informs on the specific contribution of TDS in understanding and developing mathematics teaching practices.
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