This article argues a greater stress to student-centered, active-learning approaches in teacher education beginning already in lectures by the subjects of DCEM methodological module. Our approach in increasing lecture's activity of students is involving them as teacher's co-lecturers. In order to monitor the efficiency and quality improvement of their outcomes-teacher's activities, we make use of the students'-co-lecturers, as well as students-listeners feedback, which continuously takes place at the end of a program of specific curricular units. Students self – reflections are confronted with techer's trainer noticings. Some significant findings are interpreted in compliance with teacher competences. CO-lecture's activities are valued regarding to optional AADIDG didactic pinciples.