The Coral Bleaching: Making our Oceans Whiter lesson was developed by National Geographic. This lesson plan deals with coral reefs and the recent increase in coral bleaching. The students will be learning about the ecology of reefs, the habitats they create, the algal symbiosis that ends with bleaching, and the role of human impact. The plan also outlines a role-playing debate for the students, and an in-character written assignment to come up with a compromise to protect the reefs and the economies that depend on them. On this Starting Point page, teachers can find learning goals, teaching notes and tips, teaching materials, assessment hints and references and resources dealing with this exercise. It also describes the context in which the virtual tour, another feature of the webpage, is best used.