PROJECT SUMMARY Health disparities among vulnerable populations in the United States is a serious public health concern. While health disparities was not in the original scope of the aims of ABCD, there is both a need and an important opportunity to develop health disparities research focused on adolescents in this national multi-institute funded consortium. This health disparities supplement is designed to enact a comprehensive plan to develop a strategy to increase health disparities research within ABCD. The supplement will provide support for four key components of such a plan: 1. New leadership within the Coordinating Core of ABCD with health disparities expertise and administrative support for promotion of health disparity research efforts, 2. Workgroup and protocol development engagement to ensure health disparities relevant data are collected and that these data are used responsibly, 3. Consultative resources and programs to accelerate growth of the racial and ethnic diversity within the consortium by expanding BIPOC scientists, trainees and staff, and enhancing the proportion of new BIPOC hires over historical levels, and 4. Increase health disparities research training. The program will attract and increase training of BIPOC scientists in the study of health disparities during adolescent development both within ABCD and, ultimately, within the national developmental neuroscience workforce.