An episodic and activity oriented approach is employed in this unit that illustrates the theme of interdependence of living things. Concepts related to dependence, competition, community, and ecosystems are developed through a case study of a raccoon problem. Various means of solving the raccoon problem are explored within a societal context. Five episodes comprise the unit. Each episode contains: (l) a suggested time requirement; (2) curriculum summary (describing the content, objectives, behaviorial evaluation examples, and teaching essentials); and (3) a teaching approach (providing instructional suggestions). Teachers and student resource sheets that were designed to accompany the episodes are included in the appendices. (ML)