The study is a multi-site cluster randomized controlled trial with schools (clusters) as level of randomization. Multi-stage random sampling will be applied to select three zones per country (Tanzania, Uganda and Ghana) and one district in each zone. In each district, eight public schools will be randomly selected, resulting in a total number of 72 schools (24 per country). Schools will be stratified based on school type (primary or secondary school) and location (rural or urban), leading to 36 sites or cluster pairs (3 countries x 3 zones x 2 school types x 2 locations). In each site, one school will be randomly allocated to the intervention group (that will receive the ICC-T intervention) and one school to the control group (that will receive no intervention).
At each school, 40 students (stratified by gender) in the third year of primary school or in the first year of secondary/junior high school and all teachers (expected average number: 20) will be recruited. Thus the final sample will comprise 2880 students and at least 1440 teachers.
The study will have three data assessment points: baseline assessment prior to the intervention, the first follow-up assessment six months after the intervention and the second follow-up assessment 18 months after the intervention. In addition, feasibility data will be assessed in the intervention group at the beginning and the end of the intervention.
Primary outcome measures are student- and teacher-reported physical and emotional violence by teachers in the past week. Secondary outcome measures include teachers' attitudes towards violence against students, children's emotional and behavioral problems, quality of life, and cognitive functioning.