A360’s first investment phase (2016-2020) supported over 400,000 adolescent girls aged 15-19 to take up a modern method of contraception and strengthened health systems across the project’s geographies (including Tanzania, Nigeria, and Ethiopia) to be more responsive to the unique needs of adolescent girls. In 2020, the project transitioned to a second investment phase (2020-2025), with a mandate to intensify its focus on sustainability for the project’s impact, implementation, and value. This document provides an overview of A360’s global technical strategy for this second investment phase, crafted in consultation with project funders, partners, and key external stakeholders.