In this article, The Social Justice Education in Schools (SJES) Project integrates field-based study and existing research to identify five key Principles of Social Justice Education in Schools. An outgrowth of the federally funded Massachusetts Coalition for Teacher Quality and Student Achievement, the SJES Project seeks to positively impact teacher preparation, student achievement, and social justice practice in urban environments. The authors ground their discussion in their partnership with Rodriguez Elementary School, and present specific points of inquiry to facilitate K-12 educators, administrators, and community members' critical reflection on their own school environments. By developing a concrete framework for Social Justice Education in Schools, the authors hope to encourage future empirical research explicitly linking Social Justice Education to student achievement.