For years, research on the language of classrooms explored how the way we say things impacts students’ sense of belonging. Despite this research, Science and Technology Education have failed to adequately explore how issues of race, language, and culture shape the outcomes of teaching and learning in science. This Professional Learning Unit provides an overview of a series of qualitative and quantitative experiments that document the realities of this complex interaction. It will also provide classroom-ready practices to increase student understanding and sense of belonging.