AlanBarr:
So did you actually see secondary aged girls being spanked on their knickers by male teachers in front of boys? Perhaps you did. I'm not saying it could never have happened, just that surely it would have been the exception rather than the rule, even in the 1970's.
Not exactly spanked; didn't see an OTK spanking at school after primary (elementary) school.
I saw girls bending overview given the slipper (plimsoll) and the cane on the seat of their knickers. It was quite funny boys were given them on the seat of their grey school trousers, but girls school skirts were raised to take it on their school knickers. The reason given was because a skirt was looser, it provided more protection than trousers. They could be in trouble and get extra strokes if their knickers weren't the right ones as well. The usual excuse was their mum had put their school knickers in the wash.