When I was in the eighth grade I had a science teacher that asked the class what was the smallest size mirror that you could use and still see your whole body. I thought, well, I suppose as long as you were back far enough and you could still see the mirror, then it could probably get pretty small. She said no, and that the mirror had to be at least your exact height and width in order to see your entire body. That was when I stopped trusting teachers to come up with real facts. I went home that night to test her theory only to find out that it was incorrect. Today I figure the only science she really valued was the science it took to give her enormous fake boobs. The tough thing is, you can't teach kids that sometimes their teachers are teaching bogus material. That would be a scenario when the exception became the rule. And kids will do that, so you never teach the exception, you only make them.
I remember another time in elementary school when I was taught something by a teacher that didn't have much authority behind it. There was a boy in my class that made fun of me for something, I can't really remember, it had something to do with an overhead projector. And later on that day she tried to explain to me that emotional scars last longer than physical scars. And she sited and emotional example from her life and a physical example. She had some scar on her hand and said that the scar would eventually go away. I thought, well you're pretty old and if it hasn't gone away yet, IDK, but I didn't say that to her. Around that time it became popular amongst boys to scratch a small layer of skin off the top of your hand as a test of strength. We were boys, what do you expect? Looking at my skin to day I can still see a faint scar of where I tested my manhood and yet I have no clue as to how that boy offended me. All I remember was that I was at the overhead projector and he said something. And the only reason I remember who it was that said anything was because he was really good at basketball and could nearly dunk on an eight foot rim, which I can sort of do now. Thinking of those two "scars" neither of them are really that big of a deal.
In conclusion, I'm not saying don't trust teachers, because they can be helpful, but do realize that some of them are really full of crap. So maybe this is a message to teachers, don't be full of crap or some kid is going to call you out on it, and maybe that emotional scar will last longer than any physical laceration, but I doubt it because at the end of the day, you have a job, an education, a car, house, maybe not a lot of money, but good benefits, and you are an adult.