In France and in Quebec, the training objectives of education professionals are now contained in repositories of skills. The French repository is strongly influenced by the figure of the ‘reflective practitioner’ (Schön, 1983). This paper presents a training device for future professionals of teaching and education that focuses on interactions between students through the use of practices writing groups, an inter-student correspondence and ‘cooperative institutions’. By analysing some of the materials collected for research purposes during the training, comprehension assumptions are (...) offered about the subjective rearrangements experienced by students and the device capabilities to promote an appropriate acquisition of professional position. (shrink)