Schools are crucial for promoting healthy diets and nutrition. The school nutrition environment encompasses opportunities to ensure students receive nutritious foods and accurate messages about good nutrition, supported by relevant services and education on healthy practices. UNICEF EAPRO developed the Nutrition Environment Assessment Toolkit for Schools (NEAT-S) in East Asia and the Pacific to provide data for policymakers and individual schools on the status of school nutrition environments. This aids in setting priorities and developing effective policies. The toolkit includes: a framework for school nutrition environments, guidance for use, data collection instruments, environment observations, student attitudes questionnaire, dietary quality questionnaire, reporting forms and country-specific examples. An accompanying literature review (Annex A), an editable school feedback form, and an Excel questionnaire for the Kobo Toolbox are also available.