■ RÉSUMÉ • 1618 lycéens ont été interrogés sur leurs pratiques numériques, leurs manières de travailler et le temps qu'ils y consacrent. Les résultats de cette recherche mettent en évidence le rôle pondéré joué par les pratiques numériques des lycéens sur la variation du temps de travail personnel en regard de caractéristiques sociodémographiques, du diplôme préparé et des manières d'étudier. ■ MOTS-CLÉS • Lycéens, temps de travail, usages du numérique. ■ ABSTRACT • 1618 high school students were interviewed on their digital practices, their way to work and how much time they spend using them. The results of this survey brings out the weighted role performed by digital practices of these students, their homework time according to their socio-demographic features, the diploma prepared and the ways in which they study.

HAL is a multi-disciplinary open access archive for the deposit and dissemination of scientific research documents, whether they are published or not. The documents may come from teaching and research institutions in France or abroad, or from public or private research centers. L'archive ouverte pluridisciplinaire HAL, est destinée au dépôt et à la diffusion de documents scientifiques de niveau recherche, publiés ou non, émanant des établissements d'enseignement et de recherche français ou étrangers, des laboratoires publics ou privés.

In what follows, we look into the intellectual history of Distance Education. We study the methodological, political and epistemological aspects of the shift of paradigms in the scientific thought used to construct distance learning objects. A global (not meaning exhaustive) coverage of the various ways in which instructional communication has been mediated is given. We consider e-learning's objects to be socio-technical in nature and thus that their history stems from the very beginnings of Artificial Intelligence.