摘要：The following text may be viewed as a small inaugural study of a conceptual and empirical work in progress. I produce first few considerations on the concept of teaching gesture, under a conception according which knowledge gives a specific shape to these teaching gestures. I then present a collective work device, featuring teachers and researchers. I show how such devices require special attention to the following areas: the collective work of knowledge itself, which develops a first-hand knowledge; the role of language and semiotic tools in the production of teaching gestures and the design of the relationship between gesture and devices; the fact that a teaching gesture is only the "tip" of the teaching process. Even if it can be took up and extended into a theoretical perspective, and for empirical developments, such a text must first be seen as a kind of questioned testimony.
关键词：didactics; didactical device; teaching gestures; cooperative work teachers-researchers
