Depression among adolescents is a significant public health issue in Nairobi schools, with prevalence rates up to 15% reported. A mixed-methods approach including pre- and post-campaign surveys, qualitative interviews, and observational assessments will be employed. Pre-campaign baseline data showed a 12% prevalence of depressive symptoms among adolescents. Post-campaign analysis indicates a reduction to 9%, with no significant differences by gender or socio-economic status. The campaign demonstrated potential in reducing depression symptoms, though further longitudinal studies are recommended to confirm these findings and explore mechanisms. Expand the campaign to include additional schools and integrate it into existing health education curricula for wider impact. Depression, Adolescents, Mental Health Awareness, School-Based Campaigns Treatment effect was estimated with $\text{logit}(p_i)=\beta_0+\beta^\top X_i$, and uncertainty reported using confidence-interval based inference.