I went to public schools.
Back then the dress code was like this...
Boys
Hair could not touch the big bone at the back of the neck or cover the opening of ear.
Sideburns could not extend past the lowest opening of the ear.
Jeans were allowed as long as they were not excessively faded, had holes or patches.
Shirts had to have collars and a pocket.
Girls (They were allowed to wear Jeans my Sophmore year, until then only pressed slacks were allowed.)
Tops could not expose any part of the midriff with both arms raised above the head.
Skirts and dresses had to cover the bottom of the kneecap when standing straight.
Slacks had to have a neat appearance.
Bras had to be worn at all times and be of the support type.
Blouses had to have a collar and could not be seen through when wet. Had to be button to the base of the "V" at the base of the throat.
Hall passes were expected, teachers and staff were to be addressed as Mr. Miss. Mrs. Sir or Ma'am.
You could go to the student parking lot during hunting season and find a rifle and or a shotgun in nearly every vehicle. School shut down for the for the first day of Deer Season. We never had a shooting or a knifing at the school even though half the boys wore a Buck 301 knife on their belts.
Fist fights were held behind the FFA barn on Friday, the fight stopped at first blood.
We had our first known case of a female student getting pregnant my Senior year in 1978.
We had one male student busted for drugs. He came to school every day in the Sheriff's car, was picked up by the Sheriff every afternoon and spent the weekends in the jail for 6 months.
If you got in trouble in school, the first punishment was helping the Janitor cleaning the school for 3 days. You went home when he did.
Yes, this was a public school. The school board was made up of parents of the students, most of which were farmers and store owners.
75% of my graduating class went either to college or into the military.