This document discusses adolescent development and the developmental tasks during adolescence. It outlines six major developmental stages identified by Robert Havighurst, including adolescence from ages 13-18. The document then describes the three stages of adolescence - early, middle, and late. For each stage, it lists the primary developmental tasks, such as achieving independence from parents, developing relationships with peers, establishing an identity, and preparing for the future. Overall, the document provides an overview of the physical, social, and cognitive changes during adolescence according to developmental theories.