math and science.
everyone can read and write and all you need is a dictionary and books which are free at the library, but the US is getting destroyed in terms of how many scientists we graduate. math and science need to be taught in a way that is engaging towards the youth, instead of looked at as a hassle, so maybe some of these kids will go on to get degrees in these fields. its like this, if you have a shitty writing/reading teacher, you will still be able to read and write with practice because it is required at every level. if you have a shitty math /science teacher and you only have a few science classes from k-12, then you are at a serious disadvantage. reading/writing does not teach reason and logic, while it is fundamental in math and science. so via math/science, reason and rational thought is what the kids should be picking up.