Government schools (k-12) skip a lot of teaching in favor of indoctrination in government social agendas. When even bright students head for college, many have to take remedial courses, just to be able to do freshman work.
Of the things I think should be taught, but are usually not, my short list is this:
- elementary microeconomics
- finance (a general coverage of monetary matters, investment vehicles, compounding, etc.)
- introduction to statistics (including regression analysis, odds ratios, distribution functions, etc.)
- introduction to understanding intelligence (focus on understanding g and an understanding of why multiple intelligences and emotional intelligence are nonsense)