Learning about psychological, biological, and social development across the lifespan is essential to competent, ethical social work practice. With this information, social workers can make connections among the environment, developmental factors, and the unique client. Over the past 4 weeks, you have seen Ray evolve through developmental stages in the animated videos, watching as the social environment impacts his opportunities, decisions, and life circumstances. You have seen him transition to adolescence. You have even begun to apply concepts of HBSE to social work cases such as the Hernandez family.