Exclusion criteria at school level
1. Privately run high schools
2. High schools with the peer education programme
3. High schools participating in other similar randomized controlled trials
Exclusion criteria at student level
1. Students who are not attending school at the time of recruitment or who are not in Grade 8 at one of the selected high schools
2. Students of whom parents decline to consent to their child’s participation
3. Students who are not willing to participate