So in my school every teacher has a duty period. This will usually be hallway, study hall, cafeteria, media center, lockerroom, or attendance. Just last month they've started a new duty where the teacher is in charge of buzzing in vistors, checking ids (driver's licenses), and making sure to only let people in who should be coming in. This job used to be done by an armed security guard, but the security guard didn't want to be sitting all day doing that, so he now has a position essentially roaming the school. Luckily I was not assigned to this duty, but many of the teachers that got assigned to it have refused to do it because they don't feel comfortable with that responsibility given the current climate, and they've gotten the union involved. Now they've only been able to get the non-tenured teachers to agree to take the post. Does your school have a teacher in charge of this? Or an armed guard? Or someone else?