Research methodologies including collective work between researchers, teachers and other educational actors have been developing since the 1950s, both in France and internationally. These methodologies include trends such as action research (Sussman et Evered, 1978), design-based research (Cobb et al., 2003, Collins et al., 2004) and cooperative didactic engineering (Gruson, 2019; Joffredo Le Brun et al., 2018; Sensevy et al., 2013).

 In this paper, we will present the cooperative is characterized by iterative design cycles: design, analysis and re-design in real-life implementations (Wang and Hannefin, 2005) to improve practices. The methodology engineering methodology thus refers to this process in which teachers process in which teachers, trainers, researchers, and others implement and re-implement sessions after a collective analysis and evaluation analysis and collective evaluation of the sessions.

This engineering is constituted as a network of Associated Places of Education (LéA) at the French Institute of Education (IFE). Its objective is the production of hypermedia systems (PTAHS for Hybrid System Text, Image, Sound) of documentation of teaching-learning practices (Blocher & Lefeuvre, 2016, Blocher 2018) around the creation and resolution of problems in elementary school. We propose to analyze from the theory of joint action in didactics (Sensevy, 2011, CpD, 2019) how these PTAHS are conceived and how this instrument can allow a diffusion of practices in different contexts, in research and in training