Comprising one-fifth of India's population, adolescents are a significant demographic transitioning into adulthood. Adolescents making this transition experience rapid change and heightened vulnerability. The onset of puberty is a period wrought with challenges that impact an adolescent's sexual and reproductive health and rights (SRHR). Dasra's report, Body of Knowledge, highlights the challenges that adolescents face, the efforts of key stakeholders and the specific steps implementing organizations are taking on the ground to improve outcomes for adolescents. During this research, Dasra mapped 192 organizations working to improve sexual and reproductive health outcomes in India. This report profiles 22 organizations, whose work effectively represents the scope and breadth of the adolescent SRHR sector in India.