There are so many things that you learned in school, and now you're looking back and wondering, was all crap really worth learning? You already know the answer to that question. You could've spend those precious years learning things that you'd actually need, like how to fix your own car, how insurance works, how to give someone CPR, how to take better care of your mental health, or how to file taxes properly to avoid going to jail. Those would've been nice to learn. Instead, there were these 30 insane, useless things you learned in school.