This study was a three-part exploration of what indicates and contributes to positive development for Māori youth (rangatahi). First, a literature review was undertaken to identify relevant themes. Second, we analysed data from the Māori participants (N = 2,059) of a nationally representative youth survey (Youth’07). Third, we conducted focus groups and interviews with rangatahi (N= 8) and people who worked with rangatahi (N = 6). Indicators of positive development were collective responsibility, successfully navigating the Māori and Pākehā worlds, cultural efficacy, health, and personal strengths. Relationships, activities, cultural factors, education, health/healthy lifestyles, socio-historical factors and personal characteristics contributed towards positive development. This is presented in a conceptual model called “Te Kete Whanaketanga—Rangatahi” (The Developmental Kit—For Youth).