Yeah OK. Obviously that will never happen. Any other ideas? I've got nothing.
I have a ton of ideas. Some Constitutional some not.
How about this:
Students are not allowed to bring anything into the school. Anything. Make them wear uniforms right down to the same kind of shoes. All go through a security checkpoint entering the building through metal detectors and wands. There would be no books or papers coming home - everything would either have to be electronic or there isn't any homework. That way, you eliminate all backpacks and lockers. Books and papers for each class are kept in that class and are not allowed to be removed except by the teacher who is grading. Literally the children bring nothing and take nothing into the school. All food is given to them there. They are not allowed to leave the campus once there unless it is a medical emergency or a parent picks them up - and they are not allowed to return.
I'm not quite sure why the rest of this would be necessary once you force all students through security checkpoints with metal detectors and wands.
No backpack and easy to search uniform clothes means nothing hidden anywhere.