In this investigation, students examine the topographic characteristics, water quality and human developments along Ohio's Olentangy River. They then learn about the Ohio Scenic Rivers Act and attempt to classify the Olentangy in accordance with this legislation. Presented are both a students' guide and a teacher's guide. The latter includes an overview of the unit, a materials list, teaching suggestions, answers to discussion questions and eight evaluation items. These activities can be modified to deal with almost any river in Ohio. (Author/WB)