This paper describes the application of child psychotherapy, its theory and practice, in a Pupil Referral Unit (PRU). It examines the importance of a flexible approach to outreach work and the implementation of interventions that take into consideration both the internal and the external world of the adolescent. Furthermore, the process of development of a psychodynamic group with PRU students is described and illustrated. Additionally, it explores the importance of developing psychodynamic models of working with allied professionals in supervision and collaborative efforts in general. The paper explores the usefulness of the concept of mentalisation when working in the context of schools as well as the need to develop an accessible psychodynamic language that enables multidisciplinary collaboration. Overall, this paper reflects on the importance of holding in mind the challenge of balancing the needs of the external and the internal world, which becomes very evident in the process of outreach work.