It's just reacting from a terrible story. Calm down. I know as a Mom I would have wanted someone to stay with MY children. The horror of thinking your child was murdered with no one to protect them is overwhelming for a mother. There's no blame. Just terrible sadness.
There have been too many uninformed attacks on the police and the teacher on this thread. Gawd, the poor woman is probably completely destroyed by this, and all a few folks can do is question her actions when told to leave by a gunman? Cripes.
The gunman had been in that school for about 45 minutes before the teacher could get out. He walked in with a handgun in his palm. He brought 2x4's and 2x6's with him, as well as either wire ties or flexcuffs. The teacher didn't just run and keep on going - she called for help.
Thank you. I think you are saying it better than I am.