The teacher conducted a series of lessons on the Dewey decimal system with their 3rd grade class. During the first lesson, the teacher realized that having students rotate between stations in 15 minute periods was not enough time. In subsequent lessons, the teacher made adjustments like increasing time, reducing stations, and having students work in pairs or groups. By the final lesson, having students work together in a supportive way helped ensure they stayed engaged, on task, and found success with mastering the challenges of the Dewey decimal system.