This document is a case study about Dorothy, a 16-year-old single mother living in an unstable environment with her infant daughter Brenna and boyfriend Tom. Dorothy dropped out of high school to care for her daughter but may be involved in illegal activities like drug dealing and prostitution to support herself and Brenna. Brenna is not receiving proper medical care and is often left in unsafe situations at home. Students are asked to analyze issues regarding Brenna's development by applying concepts from Piaget, Erikson, and the three components of the developmental niche from the textbook. They must identify two problematic issues from each component and explain how these impact Brenna and her mother, supporting their analysis with evidence from Chapter 3.