The document outlines an activity to teach students about finding the main idea and supporting details in stories. It involves having students work in groups to analyze news stories, identify the main idea and supporting details of one story, and present their findings to the class. The document also provides definitions and examples of main ideas and supporting details. It suggests assessing students by having them analyze the main idea and supporting details of a movie. It notes that the lesson may take two days to fully cover and recommends shortening the activity time in the future.