"How can linguistics help teachers of English language learners (ELLs) improve their instruction? What specific competencies do ELLs need to build in order to speak, listen, read, and write in a new language? Now revised and expanded with a broader view of literacy, this book has guided thousands of inservice and preservice teachers to understand the processes involved in second-language acquisition and help ELLs succeed. The authors explain relevant linguistic concepts with a focus on what works in today's diverse PreK-12 classrooms. Effective teaching strategies are illustrated with engaging classroom vignettes; the volume also features instructive discussion questions and a glossary. Coverage of timely topics, such as numeracy and the language innovations of text messages."--