This report presents the findings of an independent evaluation, undertaken by the Centre for Effective Education at Queen's University Belfast, of the Doodle Den after-school programme. The evaluation took the form of a randomised control trial and a qualitative process evaluation focusing on implementation. This report presents the key findings of the evaluation. The evaluation team is indebted to the children, parents, teachers, service providers, facilitators and schools who participated in the study. The team would also like to acknowledge the support and advice provided by the staff at the Childhood Development Initiative (CDI) and the Expert Advisory Committee, as well as The Atlantic Philanthropies and the Department of Children and Youth Affairs whose generous support made the evaluation possible.