There is a lot to be said for setting realistic expectations and holding a child accountable for them.
In the case of school systems when I was a kid, the expectation was that the kid had to learn a reasonable amount to pass on to the next grade and/or graduate high school. A reasonable amount of healthy protocol and respect for others was part of that. The teachers by and large shared the basic values of the community they served. They kept their personal religious and sociopolitical views to themselves and focused on making sure the students got a well rounded education that prepared them to be responsible, productive adults.
Certainly the values, customs and traditions of the students/community were reflected in school life including recognizing the symbols of all the national holidays and such. Also there was an American flag in every classroom, student led prayer at assemblies and times of stress for the students, recitation of the Pledge, singing of the National Anthem, a generic prayer at sporting events, a moment of silence to start the school day were all part of it because those were values of the community.
Social engineering was no part of that in any respect in the public schools and college.
And while guns were a normal presence in virtually every home including those in pickup gun racks in the school parking lot, school shootings, student suicides, truancy, bullying or other school violence was not part of our school experience.
There were regular parent teacher conferences to discuss the student's academic record, difficulties, deportment, any unusual behaviors. I do not recall a single incidence in which any student identified as a different gender, but I'm 100% certain the teachers would have advised the parents of that had it happened.