This communication explains the establishment of training environments in connection with the reform of the Bachelor’s degree in physical and sports education (EPS) in the Academy of Rennes. It is the result of work carried out at the request of the inspection group, inviting teachers to "offer a new context to the student. It tends to make the activity of appropriation/individuation intelligible in order to respond to this institutional command by describing and analyzing what happens on the side of the construction of the a priori unprecedented certifying tasks and what happens on the side of the construction of teachers in these activities. The concept of "device" characterizes the theoretical apparatus whose function is to grasp the different axiological, instrumental and existential logics that make it possible to understand and explain the characteristics of the training environments guiding the activities and the learning of teachers. It enables the identification and analysis of business configurations that will give a view of the tensions regarding the appropriation and implementation of certification repositories that bring uncertainty, and the expectations about their future. They will be able to simultaneously document how learning can be used and the joint transformations of activities/topics.