It is hard to control your emotions when your blood sugar is low. I was amazed to read that someone's kid doesn't get to eat between breakfast and lunch - isn't that what morning break is for. NZ has always had a 20 min recess for food and exercise mid morning. My son has a break from 10.30 to 10.50 then lunch from 12.30 to 1.30 (20 mins eating outside then outside play). If your child doesn't get a break for exercise and food at least every 2.5 hours it is time to start being an activist because it is not reasonable.