This document provides information on teaching English Language Learners and summarizes some key research findings. It notes that ELL students score significantly below non-ELL peers on standardized tests and that the population of ELL students is growing. Research shows that teaching students to read in their native language promotes higher levels of English reading ability. The document also outlines English proficiency levels from beginning to advanced and describes effective instructional practices at each level, such as providing basic vocabulary supported by visuals for beginning levels and exposing advanced levels to more complex texts.