We could require mandatory cooking classes as part of science or health classes to learn more about what goes into the food we eat. We can provide curriculums that teach calorie and fat awareness.
We should add cal as part of gym, encourage more strenuous recess activity at elementary and middle schools as well as to make walking a part of health or gym class. We can form before or after school walking clubs.
In addition, we could require some sort of after school physical activity (if not already part of an organized group such as baseball, football, soccer, etc.) We could also help to raise awareness of individual competition such as bike or road races or triathlons. In general the schools should become more proactive to in encouraging better eating and physical activity.