How should our schools address the childhood obesity epidemic?

Besides promoting nurtition and exercise, do schools have any further responsibility to obese students? Should schools make nutrition and exercise classes mandatory to kids who have a very unhealthy BMI? Should this be the responsibility of the parents instead? Is this a form of child neglect that requires state intervention?

How should our schools address the childhood obesity epidemic?

it really wouldn't be that hard. first of all, they need to restore p.e. to 5 days a week. most schools have cut it back to 1 or 2 days.
second, they need to quit serving crap in the lunchroom. offer the kids salads instead of tater tots and greasy pizza.
finally they need to reinforce this by teaching them how to make good decisions about food and the importance of being physically active.
yes, parents should take responsibility for this, but many obviously don't.

Schools can help by promoting good nutrition and exercise, as you say, but the prime responsiblity must surely lie with the parents.
It is not the school's responsibility. Unfortunately, there are way too may parents who could care less. That is a whole other story because childhood obesity is just one of the many problems children have due to parental neglect.
Parents and schools could consider working hand-in-hand to derive at a win-win solution.
They should serve a nutritious lunch for all students and get rid of junk in the vending machines as a start.

They should also teach proper nutrition to all students.
Schools should provide healthier food choices in cafeterias - not tater tots and canned spaghetti. There were few fresh food available in any of the schools I attended, and the few vegetables they served were dead, grey, mushy canned or frozen ones. But were schools have turned to fresher foods, fewer snacks and sodas, studies have shown great improvements in student attention in class as well as health and weight overall!
Stop letting Coca Cola and Taco Bell companies into the building to sell their crap, get Channel 1 out of the schools, and stop letting school kids be captive audiences for advertisers.