There is a myriad of research that demonstrates the links between experiences of trauma and emotional and behavioural issues in children and adolescents. Evidence is now emerging that highlights that schools are a critical system to deliver support and interventions to address childhood trauma. The ReLATE trauma-informed model uses school-wide trauma specific interventions to support students who require high levels of adjustment in education. The ReLATE trauma-informed model was evaluated as a 12-month intervention at a specialist school for emotional and behavioural difficulties. The intervention led to beneficial adjustment in various emotional and behavioural outcome domains. Significant reductions were found for parent-reported conduct problems, peer problems and total difficulties. The intervention displayed large effect sizes over the 12-month period. New students to the school demonstrated more positive adjustment. Existing students demonstrated nonsignificant positive adjustment. A reliable change was found for Global Impact, which indicated the benefits that occurred from the intervention generalised into home-life, friendships, learning and leisure activities. While previous literature has focused on teacher-observed adjustments, this study provides a parent perspective of student adjustment. This study also provides clarity around trauma-training and discusses the role that psychologists can play as consultants when implementing trauma-informed practice models in schools.