This guide is designed to provide ideas on how to integrate biodiversity into teaching at many levels in both formal and informal settings. These curriculum materials are part of the World Wildlife Fund's (WWF) environmental education program called Windows on the Wild (WOW). WOW incorporates current data from projects around the world and draws on information from many organizations, agencies, businesses, and individuals whose work is directed at maintaining and enhancing Earth's biodiversity. Activities are grouped into four chapters: (1) What Is Biodiversity? (12 activities); (2) Why Is Biodiversity Important? (7 activities); (3) What's the Status of Biodiversity? (8 activities); and (4) How Can We Protect Biodiversity? (6 activities). The resources in this guide can be used to build a unit, course, or a year-long, interdisciplinary program. A supplemental student guide is also included. (WRM)