Katharine Burn is a university lecturer in education at the University of Oxford where she leads the PGCE history programme. She taught history for 10 years in school and became fascinated by the process of professional learning, first as a mentor of beginning teachers and then as a head of department desperately trying to keep more senior colleagues focused on developing their classroom practice. After completing a doctorate studying history teachers' learning in school and university, she became research officer for the Developing Expertise of Beginning Teachers (DEBT) project, a longitudina...