Science classrooms often marginalize students of color, particularly Black and Brown boys, by devaluing their perspectives and supporting narratives that reinforce long-lasting deficit mindsets that sustain practices that keep Black and Brown boys in the margins. Using a Critical Participatory Action Research methodology, this qualitative research reflects on the experiences and reflections of three science teachers and their collective journey as they implemented culturally responsive teaching, in addition to amplifying reflections and suggestions from Black and Brown boys in their classes. [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://bibliotheek.ehb.be:2222/en-US/products/dissertations/individuals.shtml.]