IRISS hosted a series of workshops around the theme of What Works in delivering positive outcomes in the social services. The workshops were intended to be practice oriented, with the aim that attendees took home at least one strategy on how to apply research and evidence effectively in their practice. Professor Fergus McNeill discusses the role practitioner wisdom plays in youth justice intervention. The audio recording of the talk is available from iriss.org.uk/​resources/​youth-justice-professor-fergus-mcneill