With the face of American schools changing rapidly to reflect a more diverse population, today's educators must work purposefully to create a teaching and learning environment that embraces the sociocultural differences of its students. While the ethnicity of students has become more diverse, the school principalship remains mostly white, with school leaders of color being almost non-existent (Kafka, 2009; Rousmaniere, 2007; Pollard, 1997; Tillman, 2004a; Tillman, 2004b). When combined, the demographic changes in student population, the "lack" of ethnic diversity in the school principalship, and the pressure of high student achievement cause educators to investigate the effectiveness of school principals in culturally diverse schools. Keeping all of these factors in mind, the purpose of this qualitative study was to better understand leadership in culturally diverse schools and to gather data from principals currently leading in these settings, utilizing Lezotte's Effective Schools Research (1990) as indicators of effectiveness. Based on interviews conducted, four commonalities were found. First, the school leaders began as "teacher" leaders. The principals in this study also had a keen sense of self-awareness and exhibited a sense of shared identity with the community they served. These principals all possessed a sense of urgency and no excuses mentality when meeting the needs of students. Based on observations, two additional commonalities were found. The principals all advocated for their students through relationship-building and held high expectations for teaching and learning in their schools. This study also includes implications for school leadership preparation programs. These included creating a safe place where future school leaders can become aware of their cultural selves and allowing more internship experiences in culturally diverse schools. [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.]