Effective middle leading of mathematics is a complex task as it requires a focus on improving learning outcomes for students. This study gathered information about the activities of middle leaders of mathematics using a survey of primary and secondary mathematics leaders. Both primary and secondary mathematics leaders more often focussed on interacting with students in the classroom and participating in team planning meetings. Secondary leaders mentored teachers more often than primary leaders. Time to conduct some of the less frequent but more effective leadership activities needs to be provided.