Yes, all these hypotheticals about how badly people with concealed carry permits do in self defense situations.
But it is reality that matters. People actually do pretty well. They have an important edge most police officers lack.
They are already *in* the situation, so they do not have as much of a problem figuring out who the bad guy is.
To carry in a school, you have to have serious motivation.
The people who teach teachers and staff to survive this situations say their students are serious and do well.
Several years ago, Claude TX (abt. 30mi. SE of Amarillo) allowed their teachers to be armed. No problems.