“…Educational effectiveness research has frequently been criticized for a lack of attention to non‐cognitive outcomes, defined as those outcomes that are not related to curriculum subjects such as attainment in Maths (which are known as cognitive outcomes), but relate to broader aspects such as social and emotional development. While Reynolds, Chapman, Kelly, Muijs, and Sammons () have argued this critique is only partially justified, recent overviews have shown that the majority of studies in the field still relate to cognitive outcomes by a ratio of about 4 to 1 (Chapman, Muijs, Reynolds, Sammons, & Teddlie, ). Bullying, as a persistent and highly harmful phenomenon in schools, is therefore both a majorly important factor in its own right and an outcome that presents us with an important test of the existence of a relationship between school and classroom processes and non‐cognitive outcomes (Kyriakides et al ., ).…”