In 2023, Auckland Council's Sustainable Schools Team (SST) piloted a project called "Mana Ora: Students Decarbonising Schools." The aim was that students, with guidance and support from teachers and SST, would plan and implement climate and sustainability action projects linked to decarbonisation within their schools. Eighteen Mana Ora projects were implemented in early childhood, primary, and secondary schools, 13 in English-medium, and five in Maori-medium contexts. New Zealand Council for Educational Research (NZCER) was engaged to evaluate the impact of Mana Ora in English-medium settings. Auckland Council established a separate Maori-led process to capture learning from Maori-medium Mana Ora projects. The evaluation explored the extent to which Mana Ora met its intended outcomes for students, teachers, schools, and SST advisors. It was beyond the scope of the evaluation to directly evaluate the emissions-reduction impacts of the projects, or the extent to which projects supported transfer of decarbonisation knowledge and practices into homes and the wider community. However, where possible, these outcomes were explored through interviews with students, teachers, and SST advisors. The evaluation findings indicate that Mana Ora succeeded in achieving most of its intended outcomes for students, teachers, and SST advisors, with some variability across projects and contexts. [This report was co-produced with Auckland Council.]