I was reading a really interesting article recently, about a man who studies the role of sleep in our health. Anyway, in a nutshell he was staying that lack of sleep has a huge impact on our health and life expectancy, but that most people now are chronically sleep deprived. And while we are bombarded with messages about healthy eating, etc. sleep is seen by our society as almost optional.
I think this is so true. Most adults I speak to don't get enough sleep - and I think a lot of secondary aged kids don't either.