This article is concerned with exploring the ways in which head teachers' leadership for social justice is understood and enacted within the context of inclusion. Head teachers' leadership praxis is influenced by individual understandings of social justice, as well as dominant institutional realities and policy priorities that indicate the extent to which there is commitment to the process of socially just change. This commitment is significantly manifested in the ways in which an educational system advances new forms of professionalism, effectiveness indicators and accountability regimes that are aligned with concerns about providing socially just and non-discriminatory learning communities for learner diversity.