To be fair enid, we don't know how much effort the school put into trying to get the girls to wear their skirts properly.
There comes a point where the staff spend an inordinate amount of time enforcing a particular rule that is out of propertion to its benefit.
They may well have thought that an easier solution would be to change the uniform to a style that is harder to 'abuse'
I agree that kids need to push the boundaries, but if a rule is being ignored in a wholesale way, they school may need to re-think its policy.
Wearing a short skirt doesn't make a girl a tart, but it isn't condusive to good concentration in the classroom either. This is being done for the most simple of reasons, to attract the opposite sex (or same sex if the girls are lesbians). Nothing abonormal or worng in that. But I'd rather have the kids in my classes concentrating on somethinmg other than sex/. Unless we are actually learning about sex at the time