On the basis of long-term observations, this article will analyze the practices of secondary school teachers who use a social network with their students. The presentation of the results will enable us to add some nuance to the oft-heard claim that adolescents are increasingly on social media. On the contrary, these tools can encourage the fantasy that teachers are omnipotent and omnipresent. In some, they can also contribute to a confusion between private space and the professional sphere.

Adolescence, 2022, 40, 2, 321-335.