Teachers in culturally and linguistically diverse classrooms work in highly charged contexts where policy, curriculum, student backgrounds, equity issues and pedagogical expertise provide both resources and constraints. Often, these classrooms are in underachieving schools in low socio-economic areas. This study investigated one school in Melbourne where teachers struggle to balance subject content and the language and literacy needs of their students. It addresses a serious gap in research on teachers in such schools by combining a theoretical model of job demand and control, and an explicit focus on teaching literacy in a culturally and linguistically diverse school. Using data from teacher focus groups and written reflections, the study illustrates the spectrum of conflicts teachers grapple with in their daily work, including issues of workload, time constraints, institutional practices and social and cultural practices which tend to isolate and disempower them. The findings support the need for a deeper differentiation of school contexts in language teacher research. The analysis also has implications for a range of strategies to build more autonomy into teacher work and to retain good teachers in schools where they are most needed. (Contains 1 table.)