The Water in Africa Project was realized over a 2-year period by a team of Peace Corps volunteers. As part of an expanded, detailed design, resources were collected from over 90 volunteers serving in African countries, photos and stories were prepared, and standards-based learning units were created for K-12 students. This unit, "Water-Borne Illnesses," teaches students how water becomes contaminated with specific water-borne diseases. Students read personal accounts of unsafe water and work together to brainstorm solutions to the water problems of African communities. Intended for use with students in grades 10-12, the unit can be used in health and geography classes. Five to ten class periods of 45 minutes each are suggested. The unit lists materials needed, outlines applicable standards, provides essential questions, and gives student objectives. It details day-by-day procedures, assessment activities, and follow-up/enrichment activities. (BT)