Middle leaders are important conduits for school policy and are often required to lead, champion and monitor change initiatives in their departments. This paper examines secondary school middle leaders’ self-reported theories, promotion and leadership of culturally responsive teaching approaches for student equity. The study participants (n = 170) are curriculum leaders in state secondary schools throughout New Zealand, serving a range of diverse populations, including Indigenous Māori students. The quantitative and qualitative data for this project were thematically analysed to inquire into middle leaders’ articulation of their culturally responsive theories, practices, and pedagogical and curriculum leadership to assist members of their departments in supporting Māori student educational success. The study found that although middle leaders could clearly articulate culturally responsive, sustaining and revitalising pedagogies and leadership in alignment with government policies and expectations, they were less clear about the measures they used to evidence these practices. In addition, less than 30% of the middle leader participants mentioned academic achievement as an element of Māori student success, and few mentioned the importance of systematic monitoring of achievement data, or using them to support better learning outcomes for Māori students (184).