This study “How and Why Do Māori Students Succeed in a Māori Mainstream School?” is speaking about the potential and deficits of Māori achievement in mainstream secondary schooling. This dissertation is a case study on the effects of teaching students in secondary schools which is in mainstream. The research questions asked in this dissertation are my own inquiry as to “Are, how and why are Māori achieving and if not, Why not?” Māori students succeeding in mainstream secondary schools is important for this generation and the generations to follow. Working alongside them and assisting them to achieve to their utmost potential. The methods, procedures and approaches used to cause learning in the mainstream secondary school for our Māori students to achieve has been sought after and is at present in a working progression which is analyzed frequently with management and staff on the outcomes and if need be, try other avenues to empower positive results.