British expat in the US here. I work in marketing for a tech company.
I was astonished that when someone suggested a rhyming couplet on one of our ads a) no one knew what a couplet was, and b) no one even understood the basic concept of meter.
Both those things are definitely covered in high school.
Whenever I see one of those "what would you tell your younger self / a younger generation to do" — definitely "pay attention to all your classes, it all becomes useful one day"
Yes even algebra. Yes even reading Of Mice and Men