With the world population recently surpassing seven billion people, it is critical for students to consider how such growth can lead to limited resources. Both the idea of diminishing resources and the magnitude of enormous numbers can be difficult for children (and many adults) to fully comprehend. For this particular lesson, the authors chose to focus on food and created opportunities for students to consider the demands for food caused by a growing population. This lesson, modeled after a modified learning cycle approach for middle to upper elementary students (grades 3-5), is about limited food resources due to population growth and the related ethical decisions. Though they used this activity with fifth graders, teachers are encouraged to adjust or to use portions of this activity to make it more appropriate for other grades. With regard to "The Framework for K-12 Science Education," contents in this lesson relate not only to life sciences (ecosystems), but also to crosscutting concepts such scale, proportion, and quantity and energy and matter: flows, cycles, and conservation. Students use beans to explore the relationship between world population and limited food resources. (Contains 1 figure and 1 online resource.)