In observation of Earth Day, third-grade students were invited to examine what they contribute to the landfill and learn new ways they could help protect the environment. In this lesson, students collected, evaluated, and displayed data comparing the trash generated by home-lunch versus school-lunch students. Students interpreted their findings while generating ideas for reducing waste and communicating their discoveries through a letter-writing campaign. Because of the hard work and determination of a few students, an entire school has been positively affected by their recycling effort. (Contains 3 figures and 8 online resources.)