I know it's hardly the world's worst insult - but I do object to dd being called names by a teacher.
This teacher is a regular(ish) supply teacher in dd2's class - she took it upon herself to change dd2's hearing aid volume to '3' without asking her teaching assistant who would have told her that it should be set to '2'. This will have caused dd2 distress throughout the school day as it whistles and is too loud for her. Anyway, dd1 saw this in the playground and tried to adjust it - it's very fiddly and she turned it off accidentally. When she turned it on again she set it to '3' again by mistake and the supply teacher who was watching apparently called her a silly girl in a nasty way. Dd1 is only 6. She was trying her best to help her sister. I think who deserves to be called names is this teacher - she sees dd2 maybe once a month, wouldn't it have been a good idea to ask her TA what the hearing aid should be set to?