Introduction: Leur faire apprendre leur place

This dossier is the result of the 9th Meetings of Young People and Societies in Europe and around the Mediterranean (RJS9), which took place in Lausanne in October 2018. The symposium entitled "Young people, vocational training and integration into the labor market" number of interesting contributions, particularly on professional socialization. It complements a book that deals with professional integration itself (Lamamra, Kuehni & Rey, to be published), also resulting from this scientific meeting, but its focus is generally more microsociological, providing information on the processes and the dynamics that organize professional socialization. Consisting of seven articles on France, Switzerland and Spain, a preface, an introduction and an afterword, this issue of Formation Emploishows how socialization takes place in salaried employment in the "small" trades of different national spaces. It also shows the commonalities that exist beyond the differences between the education and training systems that oversee this space between the school itself and the work itself. Indeed, and whatever the context, the objectives of this professional socialization are geared towards the acquisition of a trade, its practical tricks, but also its standards and values. But it is also a question of facilitating the transition to employment and professional integration as well as avoiding dropouts, which are costly for the people themselves, but even more so for the States.