American society's increase in ethnic textures, interracial tension, immigrants, religion, gender, disability, ability, and students who speak languages other than English as their first language prolongs the pedagogical challenges teachers encounter in the classroom due to diversity. This study explored the experiences of secondary social studies teachers as curricular-instructional gatekeepers implementing culturally responsive pedagogy in times of socio-political tensions in the United States. The teacher as curricular-instructional gatekeeper framework guided this research. By adopting a qualitative multiple-case study, I utilized interviews with four teachers, two hundred hours of classroom observation, and document analysis as data sources. The findings revealed that the social studies gatekeepers' culturally responsive practices amidst the present socio-political tensions included exposing diverse perspectives to diverse students, leveraging culturally diverse learners' lived experiences, diversifying instructional methodologies for diverse learners, and confronting stereotypes in a culturally diverse classroom. Moreover, I discovered that present happenings influence culturally responsive practices by presenting difficulty in exposing specific topics to diverse learners, limiting classroom participation for responsive teaching, increasing workload in planning responsive lessons, and becoming a better teacher in a culturally diverse classroom. I recommend that further research should be conducted to explore the role of teacher education programs in preparing pre-service or in-service teachers to implement culturally responsive practices, how the multiple identities of in-service social studies teachers interplay to influence their implementation of culturally responsive practices, and how professional development training offered to in-service social studies teachers prepare them to implement culturally responsive practices amidst the growing legislation in the United States. [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.]