Allocation concealment and blinding
RECRUITMENT
Consent and recruitment of the school and individual study participants were completed before the schools were randomized into intervention groups. Baseline data were also collected from the study participants before the schools were randomized. The personnel facilitating the self-administered questionnaire for the end-line data collection were unaware of which participant or school was part of the intervention group and which one was not. One of the academic staff in the Department of Epidemiology and Biostatistics at the University of Gondar conducted the randomization procedure.