Why do teenagers act the way they do? The prefrontal cortex, which controls higher-order thinking abilities, is not fully developed until very late in adolescence. In this introduction to adolescent brain development, we will focus on the development (and under-development) of various parts of the brain, the ways this brain development affects behavior, and ways to support adolescents as they finish the crucial period of brain development. Presenter: Dr. Diane Bales, Associate Professor and Extension Human Development Specialist, University of Georgia. connect.extension.org