What subjects/topics/skills/facts about life do you wish you were taught/not taught in school?

I wish I had been taught how hard life was but I think even if I was taught , man likes to experience by himself and he doesn't confide in others' opinions as he thinks he is different but after time passes , he finds that others are right.That is why we teach our kids  to stick to what we lost.I wish I had been taught everything dealing with humans , mending cars , painting homes but school is school and it is always traditional.