Schools are being increasingly required to either deliver or externally support the delivery of interventions targeting student wellbeing and positive behavioural outcomes. Logic modelling has emerged as a method to strengthen programme design and implementation. It is an approach that conceptually describes the relationship between an individual programme's processes and its associated outputs or outcomes. There are a range of participant, programme delivery, and contextual variables that moderate programme impact. The Life Buoyancy Model (LBM) was conceptually designed through a PhD programme and refined through multiple working collaborations across child and adolescent educational, wellbeing, wilderness therapy, youth justice, and child protection settings. All categories of the LBM are designed to be populated with intervention and context-specific information. The modelling and intentional practice approach is being applied to strengthen programme fidelity, but in a manner that enables local sites to operationalise the intervention components to their context, expertise, and client group.