The Center for Ecosytem Survival publishes several teachers' guides free of charge. You can download any of the following guides by clicking on the titles below. (PDF files — Adobe Acrobat Reader required.) Backyard Biodiversity: Gets your students get started as small scale conservationists. Includes a list of native California nectar sources for butterflies. 4 pages. Common Bay Area Butterflies and Their Food Plants: A list of butterflies and the native and non-native plants they rely on. 1 page. Ecosystems and Insects: Through the example of insects, introduces the concept of biodiversity. Includes an entertaining insect activity for students. Exploring Rainforests: Sharing Wildlife from North America to the Tropics: An introduction to rainforests and their crucial role in the world ecosystem. Includes a guide to fun classroom activites. 3 pages. Exploring Coral Reefs: An introduction to coral reefs and their place in the environment. Includes creative activities for students. 3 pages. Heroes for the Earth: Ideas for projects you can do to help save rainforests and coral reefs. 1 page. Hummingbird Food Plants for Bay Area Landscapes: The hummingbirds most common in the San Francisco Bay Area and the kinds of plants they rely on for food and perching sites. Attract hummers to your own back yard! Native California Nectar Sources for Butterflies: A starter list of plants you can grow in your own backyard that will provide food for butterflies. 1 page. Make Your Own Recycled Paper: A simple guide to papermaking that teaches conservation of rainforest resources. Coral Reef Nature Notes: Notes on some of the fascinating animals that depend on coral reefs for survival. 2 pages. Coral Reef Resources: A helpful "directory" of instructional tools available for teaching and learning about coral reefs including teaching guides, films and videos, books, periodicals, CD ROMs, and more. 3 pages.