The NOCE team (New Tools for Cooperation and Education) is interested in user interactions in the Technology Enhanced Learning domain : between the user and the digital pedagogical device or between collaborating users through it. Out aim si to understand and question the uses of the dispositive, evaluate its performance in order to allow its adaptation and evolution. This involves the collection and analysis of activity traces (learning analytics), the production of indicators, dashboards and models, possibly mobilizing different theoretical frameworks in the human sciences.