When I was a school chorister at the school I attended for sixth form, we got teased a lot for being geeky- none of the cool kids did choir in my year. Still, in Upper Sixth, the senior choristers got invited to black tie dinner for School Founders Day- it was a religious occasion. No one else did. There were 4 of us girls and we were so excited about the chance to dress up & be special for once with the few equally nerdy choir boys. It's not like we went to many parties. It was the one perk we'd looked forward to. Except our UVI year was some "anniversary year" and instead of an exclusive special dinner they did some mass attendee canape reception with the school patron the Duchess of Gloucester which the whole choir was required to attend. In cassocks. Still livid. Still hate the Duchess of Gloucester.
Also my year 1 teacher was a cow. We had to go up to her to get our activity book marked. She was taking reading groups and I was shooed away each time I went near her. I was incredibly shy AND a goodie goodie. I couldn't assert myself at 5 and I was too scared of her temper to go on ahead. Ages later she saw I'd only done one page and went bananas anyway. Same horrid bitch used to complain I read too much, too and got through the levels too fast. My mum, for all her faults was utterly horrified when I revealed some of the stuff that happened in that class years later and believed me. She'd have believed me at the time, too but I was too ashamed to tell her - and she is still very upset about it.That teacher did me so much damage, I am still affected. Fuck you, Mrs Parker. I'm not sorry your marriage broke down, your longed for adoption got called off last minute because of your divorce, you broke your back and spent time in a wheel chair and then had a nervous break down you miserable, unhinged bitch. The damage you did has lasted a life time and you deserve to know how it feels.
We also had a vile teacher in upper juniors who would take yr3-6 registration. We got registered all together before assembly with a teacher. Late comers came in during assembly and teachers kept an eye on it but didn't usually blame the kids. This teacher would get angry and lay into and interrogate 8/9 year olds about things beyond their control like traffic, family morning routines, complicated multi-school school runs etc. She'd never have dared do that to the parents. I remember even at 10 feeling disgusted. Same witch also played favourites. The mum of a non-favourite overheard the disparity in treatment once and managed to catch her out. It improved after that. 
The same child in my year won every "treat" going. School were perfectly aware of Josie* always winning prizes for fun things like easter bonnets her mum made (no attempt to look like a kid did it or pick a proper winner) etc and she always got picked to hand out bouquets, help visiting dignitaries cut ribbons etc. Looking back they clearly picked a chocolate box pretty winner/model for the school mag but there was no attempt made to vary it and it was obvious. Very dispiriting and unfair for small children. Her mum always went on school trips, too- other people's parents would offer and never get to go, she always ensured she went and never stood aside to let anyone else have a turn, even when kids cried about it. This stopped when my mum told our yr 4 teacher of "some ill-feeling on the playground amongst both the girls AND their mothers".
A lighter one: Dad was born in 1934, grew up in Wimbledon. Child of the blitz. Aged about 5/6 so early on in the war, his elementary school requested sweet coupons to get the whole school sweets to keep them happy in the shelter in case of a day time air raid. They never had to take shelter, never got their sweets and he NEVER got any recompense for his sweet coupons! He is still bitter!!