From all that has been revealed, it appears that they never had "shooter drills" down in Broward County. The Broward Coward Sherriff Israel and his band of so-called Deputies apparently didn't know (or care) that seconds count, and the teachers, staff and students didn't really know how to react.
As a result of this shooting, high schools in my area are having active shooter drills. You'd think they'd be welcomed by parents, but at least one has been loud (and obnoxious) in opposition because she is afraid her snowflake will be too traumatized by the drill, never mind about the trauma of an actual situation.
Brilliant plan in local schools is that all doors must be locked at all times. So fire alarm, folks file out of room, close door. Oh it’s an active shooter, please stop shooting while teacher unlocks door ...