School leaders use professional learning practices as a strategy to improve teaching and therefore student learning. As student populations become more ethnically and socioeconomically diverse, teachers need ongoing training to meet the needs of today's students. One successful elementary school in Colorado was the focus of this case study designed to identify the professional learning practices of a school with a record of closing the achievement gap with a high Latino population and a high percentage of students living in poverty. It was found that professional learning is strongly rooted in the culture and structures of Owl Crest Elementary School (pseudonym), is guided by strong leadership, and the content is aligned to meet the needs of the teachers and students of the school. Implications of the research include: Professional learning programs require strong and supportive leadership, schools benefit from the flexibility to design a program to meet the needs of teachers and students, and there must be an investment in resources to maintain effective programs. [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.]