Sorry, but that would take too long to explain if you don't know already.
I learned basically nothing of any use during my time at school ( expensive private school ) because the teachers couldn't motivate the students to learn. Only the top tier of students got good teachers- had to keep up the reputation to attract paying customers.
Looking at school kids now, I doubt they learn much more than I did.
Not many want to learn how to do worthwhile jobs like electricians or plumbers. It's media studies, or such like silliness. They don't even learn the value of working hard to win, given winning isn't allowed, nor rough games in case the little princes and princesses scrape a knee.