This important, ongoing study, is examining diverse factors which impact brain development.

https://www.nih.gov/news-events/news-releases/landmark-study-adolescent-brain-development-renews-additional-seven-years

Importantly, several sets of data have already been released from this study which can be used for research projects by faculty and students who are not a part of this study. To learn more about those datasets, check out the National Institute of Mental Health Data Archive (https://nda.nih.gov/general-query.html?q=query=featured-datasets:Adolescent%20Brain%20Cognitive%20Development%20Study%20(ABCD))