Analysis of multiple data sources revealed a prevalent gap between high school and middle school African American students and their White counterparts in mathematics. Based on these data and a gap in the literature, further research was needed regarding how the mathematics performance of African American students is influenced by culturally responsive leadership and culturally responsive teaching. The purpose of this study was to determine if culturally responsive behaviors of high school and middle school principals influence the behaviors of mathematics teachers resulting in building conceptual understanding of their students; and, how teachers' culturally responsive actions impact the mathematics performance of African American students.

The research questions guiding this qualitative study were (1) To what extent, if any, do principals at the high school and middle school levels that exemplify culturally responsive leadership influence mathematics teachers' use of culturally responsive teaching that results in building conceptual understanding in mathematics? and, (2) To what extent, if any, do culturally responsive teaching practices impact the mathematics performance of African American students at the high school and middle levels? The results indicated that the purposive sample of high school and middle school principals (n = 7) exhibited critical consciousness (self-awareness) and interrelationships amongst teachers and students; communication and being present; and, data- driven decision-making. The purposive sample of high school and middle school mathematics teachers (n = 23) exhibited content knowledge that allowed for differentiated instruction inclusive of building conceptual understanding through multiple mathematical representations; and, engaged their students in mathematical discourse requiring students to reason and justify their solutions. Thus, such actions created a familial-like atmosphere inherent in optimal learning environments for African American students. Students with culturally responsive teachers performed better on division-wide assessments, with the effect of reducing the achievement gap between African American and White students compared to teachers not self-identified as having high levels of cultural responsiveness with results statistically significant at the 0.01 level after conducting a two-proportions z-test.