Final answer:
Grade schools and high schools have implemented strategies such as promoting healthy meals, limiting access to unhealthy foods, and increasing physical activity to reduce childhood obesity.
Step-by-step explanation:
Grade schools and high schools have implemented various strategies to reduce childhood obesity. One approach is to promote healthy meals and limit access to sugary beverages and junk foods in schools. This helps reduce energy consumption and promote healthier eating habits. Additionally, schools have focused on increasing physical activity by providing more opportunities for exercise, such as developing pedestrian routes and increasing access to parks.