Each year the NCETM and Maths Hubs seek to recruit a a cohort of expert secondary maths teachers to develop and work as Secondary Mastery Specialists over the course of two years. In the first year of the programme, Mastery Specialists concentrate on developing their own classroom teaching. The second year focus is on developing teaching for mastery in their school’s department. Finally, in the third year, the specialists support two nearby schools as they take their first steps in introducing mastery approaches to maths teaching. On the way, all Mastery Specialists acquire NCETM Professional Development Lead status.