This document outlines a 7th grade science lesson about how student actions impact the environment. It discusses how the class will test the water quality of the local Klingle Stream and how water is an interdisciplinary topic covered in other subjects like geography, Spanish, Dutch, and math. The class will also examine the water cycle, conservation, and the quality of the Potomac River. Finally, students will share results with a sister school in Bangkok to think globally and act locally about water issues.