Something that is actually worth learning would be how to actually be able to survive in the "real world". In school they teach you math science and everything else that's good for schooling purposes, but they never give you any real life scenarios like if you're stuck on the side of the highway with a blown out tire, not everyone knows how to change a tire. You could also not have phone service and wouldn't be able to contact anyone. If anything would be worth knowing if would be that school is rough and almost everyone makes it through school but then once some people get to college they don't know what to because their whole life they have lived off their parents and don't know how to survive without their parents or out in the "real world".