Migration has shifted the world's population such that hardly a monocultural society still exists. These demographic changes have brought about changes in the strategies used to maintain national unity and in the distribution of benefits, goods, and services within the society. Providing equitable access to high-quality education has been among the greatest challenges faced by many nations. The United States has been a multicultural pluralistic society since its formation, yet it continues to struggle with inequalities in educational opportunity based on ethnicity, race, and social class. This article describes an approach to teacher professional development, employing the concept of teacher learning community, as used to improve teaching practices and the academic performance of ethnic minority and low-income students in an urban school setting in the United States. As such, it is a concept that might be of interest to international communities struggling with similar issues.