At my granddaughter's school the coke machine was removed so the children wouldn't consume so much sugar. (There is a water bottle machine that they can waste their money on.) Cutting down sugar intake may help control the children's weight. Some think it also reduces hyperactivity. I have never believed the old wives tale that sugar makes children hyperactive based on my personal observation. Here is a report on some research that agrees with my opinion.

http://skeptoid.com/episodes/4142