DC12's school organised "intruder training", which involved an actor banging on windows and shouting and an alarm going off for around 40 mins, and the children being asked to close curtains of room, get under desks and stay silent for that time, teacher they were with apparently not knowing anything about it. Half the class were crying or not able to breath properly.
Has your school done this? Actor came and met them at the end of the "training" to tell them it was not real.
Thanks