Eco Schools Global was initiated by the Foundation for Environmental Education (FEE). Over the past 25 years, the FEE has continued to attract participation from many countries around the world. Eco Schools Global is now the largest environmental education program in the world. The US-Taiwan Eco-Campus Partnership Program has been operating for eight years since it was launched in 2014. To date (Oct. 2021), over 500 schools in Taiwan have joined the program and around 300 schools have received certification. Among the certified schools, 13 received the Green Flag, 116 received the Silver Award, and 177 received the Bronze Award. Over 20,000 teachers and 240,000 students have participated in the program. Not only have these schools implemented environmental education in the formal education system, they have also influenced their communities and taken concrete actions to conserve the environment. In this article, we present two school cases.