Recent contributions have argued about the depoliticisation of citizenship education (CE), mainly through theoretical and documentary analyses, and based on the European context. Nonetheless, there is a lack of field studies which can provide empirical evidence about how does the depoliticisation of CE actually operate. Based on a mixed-method research in Mexico City's secondary schools, this paper shows how the contemporary approach to CE, instead of looking at nurturing children's and adolescents' politicity, contributes to pupils' depoliticisation. Among different potential characterisations of political participation (PP), the curriculum of CE circumscribes it within the arena of formal politics, from which students are largely excluded in the present. Additionally, CE promotes a range of practices of participation which are deprived from a political meaning. Students appropriate them discursively, but perceive limited opportunities for perform them, especially in school. Through the depoliticisation of CE, adolescents mostly learn that PP is a promise of inclusion in the future, while the idea of active citizenship becomes reduced to a correct discourse about largely imperceptible practices in students' everyday life. The article stresses the need of shifting the priority of CE in Mexico from the formal curriculum to the transformation of school practices, in order to develop students' politicity through participation.