On Friday, August 31, 2018, Holston High School Environmental Science students calculated discharge rates on the South Fork Holston River and toured the Damascus wastewater treatment plant as part of a unit on water resources. This class is a full project based learning (PBL) endeavor that is team taught by Aaron Napier and Steve Ahn. Students in this class are challenged to not be passengers in their learning, but to be actively involved in sculpting the direction of their education. Generally, students will learn background material and then develop a group project to extend the learning process. The projects often involve research and some sort of community outreach. This day is preparation for a future project on nitrate contamination in local freshwater. Funding for equipment shown was made possible by the Institute for Critical Technology and Applied Science (ICTAS) at Virginia Tech and the NSF, special thanks to Washington County Service Authority and Cindy Freeman.