Children's problem behaviour in the preschool period is a severe obstacle to social-emotional development and a precondition for maladjustment in social relationships during school life. Professionals in the field have been improving existing practices to prevent and intervene in young children's challenging behaviour. To this end, many…

This case describes a body of work structured around a research-practice partnership that began in 2013 to support the implementation and evaluation of a universal social-emotional learning curriculum in the Bellevue (Washington) School District. Research activities are organized around a Design-Based Implementation Research framework, which…