This chapter summarizes research on teaching literacy skills to English language learners (ELLs). It reviews studies on instructional approaches (direct, interactive, process-based), language of instruction, home factors, and assessment. The research shows that a combination of direct and interactive instruction is most effective. Using students' first language does not impede second language development. Factors like socioeconomic status, home literacy resources, and parents' aspirations also influence literacy. Assessments of ELLs need to be in both languages and account for cultural and linguistic diversity.