I don't know how many times I've mentioned this but, once upon a time, school children brought their guns to school - on the bus. The weapons were then stored in lockers until their marksmanship class or until their after-school, extracurricular, gun club meet.
As inconceivable as this seems in our modern world - where you just know what would happen - this wasn't uncommon. It wasn't something that occurred at that "one weird school" with the strange curriculum. It was pretty much everywhere.