This investigation focuses on the life cycle of the yellow perch, the factors which can affect perch populations at each stage of the life cycle, and the methods used to manage Lake Erie perch populations. The investigation is presented in the form of a teachers' guide and a students' guide. It consists of two games related to the management of perch. The first game introduces the perch life cycle and forces which act on the population. The second game presents roles for the student to assume in a group planning situation for development of perch management policy for Lake Erie. An overview is given, followed by the prerequisite student background for success in the lesson. Necessary materials are listed. (Author/SA)