This Science Learning+ project will develop a Youth Access & Equity Research & Practice Agenda, focusing on addressing equity issues for youth, ages 11-14, primarily from non-dominant backgrounds. The project will involve researchers and practitioners from three ISL settings/contexts, (1) Designed spaces, e.g., museums; (2) Community-based, e.g., afterschool clubs; and (3) Everyday science, e.g., science media. The goal of the agenda will be to advance scholarly understanding of equity issues in relation to these three contexts. Taking an ecological view of STEM learning as a sociocultural process of participation and transformation, the project will employ a Complex Adaptive System lens to document multiple pathways youth take (or not) within/across ISL settings over time, the impact these pathways have on learning and development, and their influence on ISL organizations themselves. These lenses will help us identify aspects of learning environments which shape youth access and development, and the value and impact of the equity ideas, tools and practices.