Pacific children experience the lowest rates of timely completion of Well Child assessments, including substantial shortfalls in the B4 School Checks. The Pasifika B4 School: Exploring child and family wellbeing research is a Pacific-led collaboration to explore Pacific aligned, culturally anchored measures of child and family wellbeing, to improve the responsiveness and effectiveness of the B4 School Checks and Well Child Programme for Pacific children and their families. The research is grounded in a community-based participatory research approach that weaves in the Fa'afaletui and Kakala models. The approach draws on partnerships with health and education providers to design and trial a holistic approach to Well Child that draws on bilingualism and cultural heritage. This research will help to identify and describe measures of child and family wellbeing that recognise the holistic strengths and needs of Pacific children and their families.