This study includes designing, implementing and evaluating the effectiveness of process-based measures for improving interprofessional collaboration in Norwegian primary schools (5-7th grades). Focusing on leadership and organizational development, the overarching aim is to improve the use of existing interprofessional competence within schools. The interventions include meetings at municipal-level (strategic), school-level (operative) and class-level (operative), with feedback procedures to ensure communication between and within all levels. Also school internal and school external collaborators are involved at all levels of intervention.