No one has claimed that it would end ALL attacks. Even your phony plan would reduce school shooting. Unless, that is, the word got out that there really were no guns at a particular school.<quoted text>
I think you have just stumbled on the answer. We will require all teachers to carry non-firing, replica guns. In each school, we will train one teacher or administrator to carry a real weapon, or at least say that they are. We will not tell the public which teacher, if any, has the real weapon. Now, according to your theory, this will end all attacks on schools, but in case you are wrong, every teacher will be required to stand in the front of the classroom and wave his or her phoney weapon if the classroom is attacked. The attacker will then either commit suicide or become involved in shooting the teacher, thereby saving the lives of some children.
You are the one with the straw man argument about waving fake guns. In an attack on a school I would much rather even an untrained teacher have a real weapon to use. Incoming fire is a great distraction and hindrance to carrying out a plan of action.