Why isn't nutrition taught as a school subject?

I was having a conversation online with a friend of mine this past weekend and we were discussing the lack of solid nutrition education in school these days. Why isn't nutritional education taught in schools?

It's not that teachers have enough to do -- they are strapped as it is being child psychologists, babysitters and information sharers plus more. But are some subjects taught too much while others are taught too little?

Two areas that I believe have a huge lacking are money management and personal nutrition. Those two are more empowering than many academic areas, but since they don't prepare the average student to be a conformist worker, I guess that kind of education must be self-taught. What a pity.