Secondary schools in the city of Glasgow, Scotland are offering prizes to students for eating "sensibly" while at school. Kids earn points when they buy food, depending on how healthy someone has decided the meal is. A lunch of soup, a pita sandwich, yogurt, and milk earns 40 points. The top prize, an iPod, requires 4000 points.

Sorry, it won’t work. Educators and parents have been trying to change kids’ eating habits for years but it hasn’t made any difference. Just another example of behavour that schools try to teach – like ethics and morality – but which can only be modeled, not taught.