The lesson plan aims to teach students about sharing through the story "It's Mine!" by Leo Lionni. The story is about three frogs, Milton, Rupert, and Lydia, who fight over the pond, land, and air until it rains. They take shelter together and realize they are better off sharing the pond's resources. The plan includes pre-reading activities to introduce vocabulary, reading the story aloud with student participation, and post-reading games and crafts. The goal is for students to understand the importance of sharing and caring for the environment they share.