When I was in the 7th grade (1971-72), our schools had a dress code that stated shirt tails must be tucked in, no lettering except for 'school-oriented' attire, dresses or skirts had to be less than 6 inches above the 'fold' in the knee, girls could not wear jeans, and nobody could wear shorts (other than in PE, athletics or cheerleading periods). Furthermore, boys' hair had to be above the ears, eyebrows, and shirt collar. We had an Assistant Principal-- the only one-- who really took a delight in enforcing all these rules-- especially the boys' hair, as I can attest-- not that I violated it, as my dad was probably even more stringent in that way, being an old sergeant from WWII, but knowing so many guys who were sent home for the day and told not to come back unless they get a haircut. Sometimes even then it wasn't 'enough' of a cut.
All that changed the next year. By then, apparently our School Board was tired of fighting all this since the mid-60's, and our hair could be over the ears, but not hanging over below the earlobes. And girls could then wear jeans, though still nobody could wear shorts. I guess my dad, too, finally tired of fighting the 'barber shop battles' and I had hair over my ears by the time that year ('72-'73) ended. That assistant principal went to be Principal at an elementary school in town, but I have wondered how he would have handled things if he had still been there-- would he have tried to continue his own preferred rules, or let the boys grow our hair over our ears? It might have been fun to point to our covered ears as he watched us walk down the hall.
I have wondered about this, I suppose, for all the years since. I certainly don't see the rules as being all that stringent now. And indeed it was not that many years ago that a local school district still had the 'no shorts' rule, and there was a protest by the boys, who borrowed their girlfriends' skirts to wear in a march against it-- charging "why can girls wear miniskirts, which show at least as much leg, while boys can't wear shorts?" Well, I suppose young people have a some kind of need to feel victimized by the older generation.