Honestly, I think learning about taking something from each food group every day and how much energy expenditure it takes to lose a pound as well as balancing a checkbook and the study of the cost of carrying credit card debt (or a car loan) should be mandatory subjects in a high school curriculum.
These are life skills that would be of GREAT BENEFIT if mastered at this age and the vast majority of parents do not try to teach them. Why is this so? Because many parents don’t understand this subject matter themselves. And, even if they do, they are NOT leading their kids “by example” :=]