On December 7, 2021, a half-day conference of the MTN Unit 3 (Pedagogical Practices and Devices: Facing the Data) was held on Zoom. Its objectives were to set out interdisciplinary, epistemological, and methodological cross-perspectives on the way each discipline approaches the collection and use of data on pedagogical practices. Below is a summary and the program of this half-day workshop in pdf. Recordings and supporting documents are all available in MTN’s shared space on the “Huma-Num” server, or on request to the persons in charge of Unit 3.