From Wheeling Jesuit University and NASA-Classroom of the Future, this website introduces students to environmental challenges facing the world's coral reefs. This Coral Reefs learning module is part of the Exploring the Environment series (first reported on in the January 1, 1998 Scout Report for Science & Engineering) which present students with real-world environmental problems resulting from human activities. The Coral Reef site contains concise sections that address Biodiversity, Climate Change, Spheres (e.g. Anthrosphere, Hydrosphere, Biosphere), and Remote Sensing. The site's Teacher Pages provide support information for using the module including instructions for software-use, and objectives for Problem-Based Learning. The site also contains good-quality photographs, related links, and references. Other modules in the Exploring the Environment site include Mountain Gorillas, Florida Everglades, Yellowstone Fires, Temperate Rainforest, and more.