Thomas Olk, Karsten Speck

• In the educational-political reform plans of the last few years (e.g. the federal all-day schooling program), different forms of cooperation between institutions of help for young people and schools have increasingly gained in significance. However, empirically solid knowledge on the effects of this cooperation is still rather limited. Taking as an example social work at schools, which is considered the closest form of cooperation between institutions of help for young people and schools, the authors analyze the state of knowledge on the effects, the interrelations of these effects, and the limits of the cooperation between institutions of help for adolescents and schools in the shape of action programs for school-related social work. By means of a meta-analysis of available empirical studies, the insights that have been generated so far as well as the deficits and blind spots of existing research and the subject-related and methodological challenges in future research on the effects and the use of social work are discussed.