The document summarizes Tanzania's experience in adapting the CSI (Child Status Index) tool for monitoring vulnerable children. Key points: - The Africare COPE project in Tanzania trained 139 volunteers to use the CSI tool to monitor 12,000 households and identify children's needs. - Using the tool helped gather clear data on service delivery and children's needs. Lessons included that CSI is low-cost, user-friendly, and builds trust with communities. - Challenges included integrating CSI data into the national monitoring system and having enough personnel to reach all households. The project aims to train more volunteers and integrate CSI into district management.