This manual is a good example of the successful outcomes of the productive mutual cooperation between the United States Agency for International Development (USAID) through the Basic Education Support and Training (BEST – Yemen) Project; funded by the USAID, and the Government of Yemen (GY) through its Ministry of Education (MoE). The BEST Project and the MoE have worked collaboratively to ensure sustainable development where local resources are used wisely and sufficiently by the different Yemeni generations while at the same time building healthy school and community environment. ECOSAN was one area that the project introduced to the MoE as one significant system to reach sustainable environmental development. The Project facilitated a highly quality extensive training on ECOSAN at the Stockholm Environmental Institute – SEI in Stockholm, Sweden.