What do foresters, environmental engineers, fisheries biologists, teachers, and maybe even your neighbor have in common? They are just some of the many people that use monitoring to assess the quality of streams and rivers. In this module, students will learn how to assess a stream's quality water quality by engaging in an interactive investigation of physical stream measurements, water chemistry, bioindicators, and streamside habitat assessment. Students will observe changes in a stream as a result of natural and human actions, and be able to identify the characteristics of healthy and unhealthy streams. Supports water unit lesson 7.