The healthy weight priority is centred around Healthy Eating and Physical Activity. Under this umbrella there are many projects that schools can engage in. Although they have been grouped for convenience, they do not have to be run in isolation. Please also note the MEND pages detailing targeted work with children and families.
As much as 60% of the population could be obese by 2050, so we must start making changes in attitude and lifestyle if we want to avoid this!