Teaching is a critical consideration in investigations of primary school leadership and not just as an outcome variable. Factoring in instruction as an explanatory variable in scholarship on school leadership involves moving away from views of teaching as a monolithic or unitary practice. When it comes to leadership in primary schools, the subject matters. More sophisticated constructions of teaching are necessary that take into account the subject matter (e.g. mathematics or literacy) and the dimension of teaching (e.g. content and teaching strategies). This paper explores how the practice of leadership in primary schools is structured differently depending on the school subject.