Wading in a creek to measure oxygen levels and temperatures isn’t your average high school assignment. But students at Lanier Charter Career Academy spent the last week along the banks of Tumbling Creek to earn their certification through the Georgia Adopt-a-Stream Program with the city of Gainesville. Brian Wiley, Gainesville’s environmental monitoring coordinator, and Jennifer Flowers with Gainesville’s Department of Water Resources taught the class and helped the students prepare for the certification test.