I don't know WHEN it started but my kids are teenagers now and they had active shooter drills all throughout elementary and middle school. We lived in North Carolina at the time. I never get updates or photos or anything so I don't know if they are doing them in their high school here in IL. I wouldn't be shocked if they were though. It makes one feel kind of old to say "I remember when neighbors looked out for one another and trick-or-treating was safe and we got to ride in the back of pick-up trucks, no seat belts, car seats, helmets, noise ordinances weren't around to ban ice cream trucks and all the adults looked out for all the kids, etc.. Yeah, I guess I'm officially old now.