This document summarizes Tanzania's experience with a program to promote handwashing with soap. The program worked with the government and districts to encourage households to improve and maintain handwashing behaviors. It found that knowledge of handwashing was high but practice was low. To change this, it focused communication on rural mothers by recognizing their important role and portraying handwashing as simple, easy, and able to make a difference for their families' health. An assessment found some initial success, with 18% of households in one district having functioning handwashing stations and soap after the program. The document emphasizes the importance of understanding target audiences and incentives for volunteers.