Purple loosestrife is an invasive species of plant that is spreading through North American wetlands. In this problem, the challenge to students is to predict what effect purple loosestrife will have on wetland ecosystem in the future and if anything should be done to control the purple loosestrife. Stories about the spread of the plant appear in the popular media, so this species may be familiar to students. A materials list, teacher background information, safety practices, references, assessment, and outcomes are provided. This book selection includes the Table of Contents, Preface, Catalog of Problems, Acknowledgments, About the Authors, References, and Index.