This report examines the public health issue of childhood obesity in Australia, focusing on the National Healthy School Canteen (NHSC) program. It begins with an introduction to the problem, outlining the prevalence of obesity among children and adolescents. The report then provides background information on the issue, including contributing factors such as diet, physical activity, and the obesogenic environment. The rationale for the NHSC program is discussed, highlighting the importance of school canteens in promoting healthy eating habits. The program's description, values, and public health principles are explored, including the categorization of foods into green, amber, and red categories. The report identifies stakeholders involved in the program, such as parents, teachers, and canteen staff. Strengths and limitations of the program are analyzed, including its cost-effectiveness and potential for influencing eating habits beyond school hours. The report concludes with recommendations for future studies and program implementation. References from relevant sources are provided.