This review examines current research on teaching English Language Learners (ELLs) in four content area subjects: History, math, English, and science. The following topics are examined in each content area: The linguistic, cognitive, and sociocultural features of academic literacy and how this literacy can be taught; general investigations of teaching; and professional development or teacher education issues. The article summarizes key findings in the literature, examining trends and discontinuities across the different content areas, and concludes with implications for teaching and suggestions for further research. (Contains 1 note.)