Short-term effects of the "Together at School" intervention program on children's socio-emotional skills: a cluster randomized controlled trial.

Background: Together at School is a universal intervention program designed to promote socio-emotional skills among primary-school children. It is based on a whole school approach, and implemented in school classes by teachers. The aim of the present study is to examine the short-term effects of the intervention program in improving socio-emotional skills and reducing psychological problems among boys and girls.