"The nation's two largest teachers' unions want schools to revise or eliminate active shooter drills, asserting Tuesday that they can harm students' mental health and that there are better ways to prepare for the possibility of a school shooting.

The American Federation of Teachers and National Education Association joined with the advocacy group Everytown for Gun Safety Support Fund in calling for an end to unannounced drills or drills that simulate gun violence.

“In Indiana they were shooting teachers with rubber pellets so they would feel the adrenaline of what a school shooting would feel like," said Shannon Watts, founder of Moms Demand Action, which is part of Everytown. “In California recently, a superintendent hired a stranger to wear a mask to rattle the doors of classrooms without letting faculty and students know. We've seen students asked to pretend to be victims and lie down using fake blood in the hallway.”

nbcnews.com/news/us-news/two-largest-teachers-unions-call-schools-revise-or-end-active-n1136271