The senior-level course Water Pollution and Purification for environmental science majors at the University of Maryland-Eastern Shore requires students to use interdisciplinary knowledge, critical-thinking, logic, and problem-solving skills. Starting with a unit on surfacewater versus groundwater pollution, students acquire these skills through continuously answering progressive questions; they use audiovisual aids, do library assignments, and perform case studies. The process improved students’ test performance and overall interest in addressing real-life problems.