Effectiveness and Implementation of a School-based Mental Well-being Intervention Among Adolescents of Bharatpur, Nepal

The goal of this study is to evaluate the effectiveness and assess the implementation of CROSS-MIND, a school-based mental well-being intervention for adolescents in Nepal. The study uses a Hybrid Type 1 mixed-methods design. The main questions it aims to answer are: Does CROSS-MIND improve students' mental well-being, self-esteem, and behavioural and emotional outcomes compared with usual school activities? Is CROSS-MIND acceptable, feasible, appropriate, and delivered with adequate fidelity, and what barriers and facilitators influence its delivery by teachers? For the effectiveness evaluation, classes of grades 6 to 10 in five schools in Bharatpur Metropolitan City will be randomly assigned to receive either the CROSS-MIND intervention or usual school activities. Students will complete questionnaires before and after the intervention. Students in intervention classes will participate in eight weekly storytelling and reflection sessions of approximately 90 minutes, delivered by trained teachers. Qualitative interviews and focus group discussions will also be conducted with selected students, teachers, school principals, and psychologists to explore experiences of the intervention and factors influencing its implementation.