Well technically we had a lock down, and then a "hold and secure".
Lock down has us sitting in our locked classrooms with the lights off. Hold and secure means we can move around the building, but no one is allowed outside.
There was a stabbing at the High School two blocks down from us. I am not sure how we found out, but from what I overheard in the office, we found by accident. For some reason the police didn't contact us, though they did contact another elementary school equidistant to the high school.
Except for one girlwho panicked most of the class did ok. Thing is, I am pretty sure she didn't know what "lock down means" but when my ECE and I went and locked the classroom doors she burst into tears.
Luckily the hold and secure was over before hometime.