The purpose of this study was to describe the school situation of adolescents who were subject to multisystemic therapy in Sweden, and also if a change could be measured after treatment. Factors that preceded the need for treament were also investigated. The sample consisted of 83 adolescents, boys (65 %) and girls (35 %), with an average age of 14 years. The method used was a secondary data analysis using pre-treatment- and post-treatment data collected from a 7-month follow-up conducted by Lunds Universitet. Results showed that the adolescents were low in school performance and high in truancy at pre-treatment. Truancy was the main reason for the need of treatment (50 %). The follow-up data showed tendencies of positive outcomes in the adolescent's school performance. Further research is needed to better detect weakness in adolescent's school performance and focus interventions to improve that area.