Because there have been some instances where weapons were brought into the school, we realized the need for metal detectors in the building.

Keep in mind: The reason for the metal detectors is to have a valid explanation as to why there would be no weapons in the school.

This is not an opportunity for any student to attempt to bring a weapon into the building in hopes of getting caught just to start a scene. Not only would that be dispruptive to the school session, but the whole point is we are trying to discourage weapons/violence amongst kids... especially while in school.