quadratic formula
How to find the area of weird obscure shapes (we actually did learn this, but I forgot it because it seemed so useless but turns out, in knitwear design, this could actually be quite useful)
How to feed yourself
How to do your taxes
Knitting
Names and dates of wars
How the government actually works (both in theory AND in practice)
How to avoid urinary tract infections
How to knife-fight (they did teach this in the cafeteria, if you were paying attention before the security guards showed up)
Lord of the Flies
How to balance chemical equations
How magnets work (self-explanatory, I feel)
How to fool a lie detector test (this we did learn, but the teacher who taught us is in jail now so I’m not sure he knew what he was talking about)
How to sew a button (I learned this in middle school but I hear they’ve stopped teaching it, which is a huge mistake)
If it were up to me, I would totally revise the current general high school curriculum. I remember learning plenty of useless garbage that’s still vaguely cluttering up my brain, but, more importantly, there’s a lot I didn’t learn that I really wish I had.