This thesis examines the way working class children’s practices and representations of science areconstructed. It aims to renew the approach of persistent inequalities in access to science pathwaysand careers, in which women and people from the working class and/or ethno-racial minoritiesremain largely underrepresented. In order to question power relationships underlying access toscience in a new way, this research considers science not only as a body of knowledge and aprofessional eld, but also as a culture. Evidence for this study comes from longitudinal interviewsconducted with about 50 children (two interviews, in the 4th and 6th grade) and with parents,teachers, and science mediators. The analysis also relies on the detailed ethnograph...