The Great Lakes are the largest series of fresh water bodies in the world. They are used for a wide variety of purposes by the 37 million citizens of the United States and Canada who live near the lakes and share this resource. This guide is intended to guide youth in acquiring training and field experience related to the Great Lakes in areas such as ecology, marine careers, natural resources, economics, recreation, history, and culture. This project guide for students in grades 6-12 suggests activities for learning about the Great Lakes and provides an extensive list of references and resources for further study. Units include: (1) "Recreation"; (2) "Heritage"; (3) "Ecology"; and (4) "Economics." Each includes objectives and suggestions for activities at the beginning, intermediate, and advanced levels. The reference section, which constitutes the bulk of the guide, lists resources organized by media type including audiovisuals, maps and charts, software, and publications. Within each section, the resources are organized by content topic. (CW)