Not really bullying, but in year 3 (That's third grade, I think? XD) we had this supply teacher...
Basically, my mum worked at my primary school, and when this supply came in, she really didn't like me for some reason. There was no reason for it either, I was always a goody two shoes and I never got a detention or anything like that!
Anyway, at every single opportunity she could get, she would shout at me, ask me to stand up in the middle of class, and I wasn't allowed to sit down! She kept saying, "I've heard your mum works at the school, I'll tell her you've been bad" and things like that
Its a pity my 8 year old self was too dumb to realise what was happening, I'd give her something to reason with if it happened now!