Eh, I remember I was put in a D class. Math classes there were like "today we are going to study addition, who wants to ask this student to add two numbers?" so I volunteered and asked the guy to add 5 to 7 - I understood that the class somehow struggled with two digit numbers and wanted to see this in action. The teacher, though, realized what my plan was and said we can't do this level of complexity right now. That day I learnt something important though: that the crowd follows "the rules" without questioning them and that being a smartass isn't rewarded. We were 6-7 year olds then.