"Biodiversity" is the term used to describe the incredible variety of life on Earth, the wealth of habitats that house all the life forms, and the interconnections that tie everything together. This activity guide is designed to help teachers use the "Web of Life" video and to provide information and activities to expand on concepts introduced in the video. It contains a summary of each segment of the video along with key points and discussion questions for each one. The background information is divided into four major sections: "What Is Biodiversity?"; "Why Is Biodiversity Important?"; "Why Are We Losing Biodiversity?"; and "What Are We Doing about the Loss of Biodiversity?" Each background section is followed by two or three related activities. Each activity lists the materials needed and the video segments that complement the activity. The resource section contains a list of reference books, multimedia resources, and activity guides. (JRH)