This resource consists of five activities for students to explore food webs and food pyramids within the context of a wetlands ecosystem. The example ecosystem is based in Ohio but would work as an ecosystem introduction in any state. The lessons highlight the interdependence of organisms within a wetland and how energy flows through food webs as higher order organisms consumer lower trophic level organisms. The first activity, How Does Energy Travel?, looks at food chain relationships within the wetland. The second activity, How Does EnergyTravel Through Food Webs?, allows students to create a wetland food web. In the third activity, Can one change in a Food Web Affect the Entire Community?, the students look at an example of a e single change that affected the entire ecosystem on Wolf Island. The fourth activity, What Is the Pyramid of Energy?, introduces the students to the Pyramid of Energy and the Rule of Ten Percent. The final activity, What Is the Role of Energy and Matter in an Ecosystem?, students learn that although an ecosystem constantly recycles its matter, it must also constantly receive new energy to remain in balance, how the energy is used, and how to identify food web roles in the ecosystem. In the final activity, How Do Humans Fit into the Pyramid of Energy?, students compare the foods they eat to the Pyramid of Energy in order to discover their consumer level. The time suggestion for this unit is seven 45-minute class periods.