All in all, we learned many things from the school system in whichever country we are/were from. I know I learned one important thing in high school and that was driver's education. Some schools were lucky enough to have driver's education within their high school. For those students, they learned to drive while in school and didn't have to pay extra fees to learn through a driving school. Because of that we were better prepared for what was ahead of us.
I'm sure after graduating from high school or college, you have had experiences that you weren't prepared for. For example not knowing:
How to prepare for an interview properly
How to create a budget
How to effectively save money
How to cook a simple, yet nutritious meal
How to speak/communicate with people
What are some other things you wished you had been taught in school?