School pupils have long been drilled in what to do in the event of a fire. Lining up in the playground while heads are counted is a routine part of school life.
Now, another type of drill appears to be increasingly common in British classrooms: the US-style lockdown, where children are prepared for the grim possibility of a violent attack on site.
More than a quarter (26 per cent) of primary school teachers have carried out such a drill since September, and 36 per cent of secondary school teachers, according to a recent survey by Teacher Tapp. Some primaries are reportedly also spending thousands of pounds on security systems to alert staff to intruders
