The Greater Portland Sustainability Education Network (GPSEN) is a multi-sector network of educators, students, non-profits, political and industry leaders, organizations, and community members collaborating to promote sustainability education in the Portland Metro region, including Clackamas, Multnomah, and Washington Counties, in Oregon, and Clark County in Washington. Acknowledged as a Regional Center of Expertise (RCE) on education for sustainable development (ESD), by the United Nations University, in 2013, we are part of a coalition of 136 RCEs around the world.