With the student body across Europe becoming more diverse, the issue of religious education in schools has come to receive greater attention. In the context of the specific historical and institutional context of the Irish primary educational system, this paper addresses aspects of the religious and moral formation of primary school children. The methodology employed in this study is qualitative: it is based on in-depth interviews with school principals, teachers and parents, and focus groups with students in five case-study schools. The paper examines the role of both home and school in the development of religious and secular beliefs. It also examines the way children are active agents in their own moral development, specifically how they mediate and interpret three sets of influences, namely formal school-based religious instruction, the broader school climate, and the implicit values and beliefs communicated by school, parents and the wider family.