This teaching guide deals with the ecological composition of a marsh and the ecological effects certain changes might have on a marsh. This study focuses on the fresh water marsh found in the Florida Everglades which can furnish the student with several examples of past, present, and possible future ecological changes which impact this ecosystem. The study is developed around eight basic inquiry questions about change in the ecosystem of a marsh, which are accompanied by a series of learning activities. No one activity will answer all of the questions; however, completion of all investigations should provide the student with sufficient data on which he can develop tentative conclusions. The student learning activities have been designed into a role-playing simulation entitled"The Everglades Survival Game." The guide is divided into three sections. The inquiry questions, section one, outlines the activities for the simulation game and includes learning activities, resources, evaluation, and teacher suggestions. The student materials, section two, are statements, background information or activities which are used in the game. The teacher comments, section three, introduces role playing, and provides an overview of the game, game roles, game rules, and materials needed for the game. (TK)