When students enter high school, they must not only ensure their academic success but also experience many biological, social and psychological changes that greatly affect their school experience. Teachers, in their ways of interacting and teaching, directly influence their students'lives: they have to teach the subject, manage their class and achieve the Quebec's MELS goals while dealing with students' maturation. Moreover, as in any profession, a knowledge base for teaching is necessary. We therefore believe that knowledge of adolescent students is crucial for teaching practice, as the student is at the heart of education. Thus, considering the importance of this period of life and of the knowledge of the foundations of teacher education, we ask: how is knowledge about adolescence and the teenager student integrated into Quebec's teacher education program of secondary school teaching?