Healthy school environment: effectiveness of hand washing instruction in an elementary school setting.

Hand washing remains the single most important action for preventing the spread of infectious diseases. Although easy and inexpensive, promoting hand hygiene in an elementary school can be a challenge. This study was a collaborativeproject between the co-investigators (a registered nurse at an urban elementary school and a senior high school student working on a senior International Baccalaureate research project), the 5th-grade science teacher, and a physician from the local children's hospital. The study purposes were to (a) determine the effectiveness of a 30-minute hand washing educational intervention at decreasing organisms on the hands of 5th-grade students and (b) introduce the 5th-grade students to the scientific method. Forty-one percent of the 5th-grade students used an effective hand washing technique after receiving instruction on proper hand washing.