“High school English teachers” are already a sort of suspect group, in that they would almost universally have a built-in bias AGAINST guns, not the least of which would be, “No guns in MY classroom!” That, and they are, almost to an individual, very liberal in their political stance.
Sad to say, that prohibition is probably broken daily in hundreds of venues, by underage carriers in illegal possession of a sidearm, brought with the intention of imposing will against OTHER students, most of whom are unarmed, or authority figures of all kinds.
And “commonsense” has become a code word and dog whistle for the left. It means “ram it down their throats, no dissent allowed”.
To the left common sense means anything that makes sense only to a common leftist.