By nurturing a sense of respect and value for self, others, and the world, teachers encourage children to become stewards of their school and home communities. Developing young children's sense of responsibility (understanding that their actions can have important and enduring impacts on others and on the environment) is a core value of Montessori education. The U.S. Fund for UNICEF collaborates with schools like Coastal Empire Montessori Charter School in Savannah, Georgia, to develop and implement PK-12 global education resources through its TeachUNICEF program. These free, online resources focus on critical global issues such as poverty, health and nutrition, children's access to education, and water use and sanitation. This article details the authors' collaboration at Coastal Empire, then re-visited the topic of water use and sanitation in the spring of 2010, with the fourth and final lesson coinciding with World Water Day, celebrated annually on March. (Contains 10 notes.)