This study is focused on post graduate student teachers’ perceptions of cross-curricular approaches to the planning, organisation and representation of the primary curriculum. It tracks their emerging understanding of the nature of cross-curricular education prior to and following their own cross-curricular learning experience in art and science. The findings reveal a paradox between their initial positive perceptions and their direct experiences of such practice. The conclusions identify some implications for enhancing critical engagement and the development of teacher subject and pedagogic knowledge in initial teacher education.