Ecosystems, interacting systems of biotic and abiotic factors, are a fascinating topic in life science. The "Next Generation Science Standards" (NGSS Lead States 2013) recognize "Ecosystems: Interactions, Energy, and Dynamics" (HS-LS2) as one of four overarching ideas in life science that students should understand. Student appreciation of these complex and fragile systems is more important than ever as human impacts threaten biodiversity around the globe. Direct observation of real ecosystems is essential for students to build both ecological content knowledge and the scientific practices needed to investigate natural systems (Korfiatis and Tunnicliffe 2012). This investigation was designed to build students' understanding and appreciation of ecosystems in an authentic, engaging, and cost-effective way. It employs the 5E Instructional Model (Bybee 2016) and spans a three-week ecosystems unit. This unit was taught to junior and senior AP Environmental Science students at a Title 1 high school, though it could easily be adapted for use in a variety of life science courses.