Um. Where are the teachers?
And before I get lambasted with "teachers are not parents" and "education starts in the home", yes, it does. But the reason why we have schools to teach our children - and why schools have behavioral guidelines and disciplinary systems - instead of leaving them at home with a bunch of books is because children need adult guidance and, yes, adult supervision. It's the shared job of the teachers and the parents to help children figure out the basics of what needs to happen in life.
Eating yucky things because they are good for you is just part of growing up, and that school board needs to be taken heavily to task.