Many scholars argue that the practice of educational tracking exerts a distinct effect on young people's political engagement. They point out that students in academic tracks are becoming more politically engaged than those than those in vocational ones, and suggest that this may be due to differences across tracks in the curriculum, pedagogy, peer environment or student self-confidence. The current paper aims to investigate whether tracking is related to political engagement through any of these four mechanisms. It uses survey data collected among students in the final year of upper secondary education in France and employs a stepwise multilevel analysis to explore this question. It finds little differences between tracks in the curriculum and in pedagogy relevant for political engagement. Students in academic tracks nonetheless express a stronger commitment to vote than those in vocational ones. This difference between tracks disappears when the social composition of the school population is taken into account, suggesting that the peer environment is the primary mechanism driving the effect of tracking in France. However, in contexts with greater variation between the tracks in curriculum and pedagogy, the latter may well be equally or more important mechanisms.