The lesson plan introduces students to volcanoes through a role-playing activity. Students are assigned roles like volcano, lava, vent, and crater to introduce the key features of volcanoes. They then learn about the three types of volcanoes - active, dormant, and extinct - through additional student roles. The lesson concludes by discussing how volcanic eruptions provide benefits like rich minerals and suitable soil despite threats to human life. Students are divided into groups to discuss topics like volcano features and types, then present their answers.