Students are not allowed to talk to one another unless they have been noted as having been very well behaved. As the children suffer serious behavioural problems this reward does not come often.
More often than not they will be given an agonising electric shock.
The Rotenburg Centre, near Boston in the US, hosts children as young as nine years old wearing ten pound backpacks, with wires leading to their limbs and torso. Misdemeanours such as swearing or shouting can be punishable with a shock. One journalist who tried the "therapy" reported that it felt like being attacked by a swarm of wasps.