Élise Ledoux, professor at UQAM, draws a descriptive portrait of youth, 15 years of age, holding a job during the school year. In this conference, the researcher speaks about their labour market entry and the reasons they give for holding or not holding a job during the school year; describes the type of employment held, the number of hours worked and the work schedules. Moreover, she describes the conditions in which the work is carried out; examines work injuries and ways of increasing awareness regarding occupational risks and, lastly, compares the health and personal engagement in their studies made by students holding a job during the school year with those who did not work.