This manual was created by 4th grade students at the Alice B. Beal Magnet School in Springfield, Massachusetts, during a learning expedition on rocks and minerals. The expedition included fieldwork to local geological sites and to museums. Students worked with local geology experts and did hands-on lab work in the classroom. Students were taught the complex process of rock tumbling. Students thought that if they created a manual, future classes would understand much better about the tumbling process. Their manual included written descriptions of all of the steps, diagrams of several of the different steps, and a few color digital pictures.