This paper deals with cooperative pedagogical scenarization. It presents a work carried out after an experience aiming at creating online training courses for an university degree. In the experience, lecturers had no experience in designing full online courses, and needed the support of pedagogical engineers to adapt their courses to suit online learner's requirements. The paper presents several models allowing pedagogical engineers to specify scenarios and also the process to be carried out in order to design these scenarios with lecturers. These models have been integrated in an online platform allowing pedagogical engineers to assist lecturers all along the design process to export the produced scenarios on the Moodle platform. [For the full proceedings, see ED621557.]