A teacher at an inner-city Auckland primary school reported "an enduring sense of calm" after her students had six weeks of training in "mindfulness".
The training had "profound effects on a couple of children" who had been unable to sit still and easily distracted.
In a smaller, low-decile school, another teacher reported that children who got into a fight calmed down more quickly.
"Most of the credit for this can go to mindfulness, as the class are thinking about their actions instead of reacting," the teacher said.
"Mindfulness" is an established technique for adult mental health, helping people to cope with stressful issues in their past or stressful upcoming events by focusing on the present - observing and appreciating the world around them and the state of their own bodies.