Young people are excited about the future and have smart ideas for solving the challenges they see in the world today. Too often, however, youth are left out of conversations that impact their lives, communities, and futures. Afterschool programs and other out-of-school-time (OST) programs that are rooted in principles of positive youth development have recognized this and are increasingly centering youth voices in their programming and supporting them in efforts to improve their communities. At the same time, opportunities to engage with science, technology, engineering, and mathematics (STEM) in these programs have increased, providing young people with a powerful tool to utilize for change-making in today's STEM-driven world. Typically, programs use direct impact on youth as one success metric, capturing data such as their sense of agency, skill level, content knowledge, or confidence. Less is known about what happens at the systems- or community-level when young people are positioned as stakeholders in community conversations. This project aims to address this gap by conducting a study of programs operating at the intersection of OST STEM learning, youth leadership, and community engagement. The team will examine not only the programs' impact on young people, but also how community issues were addressed, and the extent to which the community was impacted because of youth participation. The goals are to: (1) Document the broader systemic impact(s) of youth involvement; (