 A total of 54 school nurses, social workers, and psychologists from all public secondary schools in the standard education system of City of Espoo, Finland will be trained in IPC in a three-day workshop in two waves. Each school plus the one primary care level health care unit for adolescents in Espoo is represented by 1-3 trial IPC counselors. In the first wave the schools are cluster randomized to provide either A 16 sessions of IPC, or B 16 sessions of standard treatment ST, which consists of psychosocial work as guided by the workers own standard professional principles and methods. The workers randomized to deliver IPC get the IPC training immediately. In the second wave those who delivered ST in the first wave will be trained in IPC. The data for this trial will be collected from the first wave. The data collection period is one school year plus follow-up of clients after 3 and 6 months. 