Until recently, second language writers were typically separated from their peers in mainstream composition courses. However, as the field considers the possibility of integrating second language writers into mainstream composition classrooms, important questions arise. For instance, how are teachers of First Year Composition (FYC) prepared for valuing and responding to the linguistic resources of students representing a range of linguistic backgrounds? Also, what would happen if teachers of FYC had a broader view of multilingualism in the mainstream composition classroom (one that includes fluent bilinguals, English-dominant bilinguals, and second language writers)? This study addresses interests and questions such as these by examining whether and how new Teaching Assistants/Associates (TAs) take up or respond to critical perspectives on language and race introduced during their first semester teaching. Specifically, I analyzed how a group of new TAs are thinking about language and race in relation to learning and writing. Through surveys, observations, and interviews, I documented and analyzed how they engaged in conversations about language, writing and race; made sense of readings and activities on the theoretical concepts of raciolinguistics and translanguaging; and responded to information presented during two workshops on these topics. I also explored what these TAs said about the relationship between their own critical perspectives on language and their teaching practices (current and future). Findings show that participants’ critical language awareness and their ability to envision a critical language pedagogy grew over the course of the semester. Findings also show that, even though they expressed uncertainty about the precise meaning of theoretical terms such as raciolinguistics and translanguaging, their stated beliefs align with the central claims of scholarship advocating such perspectives. The findings of this study shed light on ways to help new teachers of FYC support multilingual students from a range of backgrounds–especially those TAs who work in contexts where ideologies of race and language devalue multilingualism and nonstandard varieties of English and influence what counts as academic writing.