School-based food and nutrition education (SFNE) helps schoolchildren and the school community to achieve lasting improvements in their food practices and outlooks; build the capacity to change and to adapt to external change; and pass on their learning to others. SFNE has also an important role in complementing efforts that are being made globally to improve food environments, and in empowering children and adolescents to become active participants in shaping the food system to be better able to deliver healthy and sustainable diets. Despite increasing interest for SFNE, the evidence that supports it and its potential, much of traditional SFNE, particularly in LMICs, is largely underfunded, not delivering results, and disconnected from other key interventions that aim to support the food, nutrition, environment, and education nexus. SFNE is under-resourced, with capacity development opportunities lacking throughout the school system.This White Paper is the first document of its kind, and it is based on the evidence, professional expertise, and field experience, lessons learned, and documented challenges of SFNE work in a variety of contexts. It presents the case for raising the profile and transforming the vision and learning model of SFNE. This document is directed firstly to a technical audience working in governmental organizations that deal with schoolchildren and adolescents and is also of interest to researchers, technical advisors, decision-makers, donors and investors, civil society, and UN organizations.