This research had two purposes: (1) to explore the experiences of prospective teachers learning to teach mathematics within an inquiry-based teacher education programme; and (2) to study whether and how these teachers enacted what they had learned in their teacher preparation programme in their first year of teaching. The analysis draws on interviews with one graduate to explore some of the ways in which this new teacher enacted inquiry-based teaching approaches in his first year of teaching. This article presents implications for beginning teachers’ collaborative practices, for the assessment of new teachers and for practices in preservice teacher education.