This study is an inquiry into how school leaders influence the integration of sustainable practices within their schools. This multiple case study explores and describes how five Green Ribbon Schools integrated sustainability literacy in their curriculum, modeled best management practices within their school facilities, and created healthy and sustainable communities. In addition, this study focused on how school leaders promoted and supported the integration of sustainability concepts into a standards-based curriculum. [The dissertation citations contained here are published with the permission of ProQuest LLC. Further reproduction is prohibited without permission. Copies of dissertations may be obtained by Telephone (800) 1-800-521-0600. Web page: http://www.proquest.com.bibliotheek.ehb.be/en-US/products/dissertations/individuals.shtml.]