The school health and nutrition (SHN) toolkit has been developed to provide guidance, tools, and resources to support SADC member states in developing effective national mechanisms and action plans to strengthen their SHN programmes. The SHN toolkit is a practical guide that builds on the SADC School Meals Guidelines, and AUDANEPAD HGSF Guidelines. It has been expanded in scope to align with the WHO Health Promoting Schools Framework, and the Global Standards for Health-Promoting Schools. The toolkit draws knowledge and best practices from the Focusing Resources on Effective School Health (FRESH) and the Systems Approach for Better Education Results-School Health and School Feeding (SABERSHSF) framework. The SHN toolkit is divided in two sections: Section 1 provides a foundation for understanding the core elements of effective SHN programmes and their impacts on the education, health and nutrition outcomes of school children. It provides evidence-based recommendations on the best intervention options, including practical guidance and tools for developing and implementing necessary solutions. Section 2 provides technical guidance on configuring and implementing the recommended minimum package of SHN programmes. This section is designed to help understand the “what,” “why,” and “how” of integrated SHN programmes.