A few weeks into my sophomore year of high school, we had a surprise lock down/active shooter drill. I was in theatre class, crouched behind my teacher's desk off stage right. She sat in front of us. It was terrifying.https://twitter.com/jameshamblin/status/966432922206113793 …
When teachers asked why the drill was kept a surprise, the school said that previous drills (where advance notice was given) weren't taken seriously.