At Halstow(1958-1963), I can only recall a pair of boys & a pair of girls being caned-same offence, truancy, typical of what I remember;girls and boys didn’t tend to misbehave together.
I saw few in-front-of-the-class smacks there, infants or primary. Once again, it always seemed to be single offenders & both boys and girls suffering retribution.
The difference between the sexes in my day seemed to be, in normal circumstances, girls were better at looking innocent when there was suspicion of bad behaviour than boys.
Except if the boy was me looking to hide a catapault in places unlikely!!