The importance of continuing professional development (CPD) is increasingly recognised as an important contributor to school improvement. Successful CPD involves gaining the commitment of teachers to the process, and to sustaining and supporting their involvement in activities that are beneficial to both their professional growth and the development of their school and the children. This article describes a whole school improvement initiative that sought to do just that: a partnership, in which Hampshire inspection and advisory service; University College, Winchester; and the teachers at Lee-on-the Solent Junior School, worked together to enable practitioner research to become both a reality, and a powerful contributor to both personal development and school improvement.