Effectiveness and mechanisms of change of a mindfulness-based intervention on elementary school children: A cluster-randomized control trial.

Mindfulness-based interventions (MBIs) in the school context are increasingly widespread worldwide. The present study evaluates the effectiveness of a school-MBI (GrowingUp Breathing program) on children's socio-emotional and academic development. Three hundred thirteen elementary students from 7 to 12 years old from two schools in Madrid (Spain) participated.