This Human Capital Review (HCR) report presents an in-depth analysis of human capital indicators throughout a person's lifetime, from in utero to productive aging. By examining the various stages of human capital accumulation, the report aims to provide accurate recommendations for specific groups in Sierra Leone. Thus, the report disaggregates data whenever possible. It relies on an extensive consultative process involving various stakeholders such as Government counterparts, development partners, teachers, adolescent girls, students, private sector representatives, and local representatives. The consultation process followed a Problem-Driven Iterative Adaptation (PDIA) approach, which facilitates the identification and resolution of problems by local leadership. In addition, this report aims to inform the design and implementation of human capital reforms that will respond to specific challenges identified in the report.