As English learners face the double demands of building knowledge of a second language while learning complex grade-level content, teachers must find effective ways to make challenging content comprehensible for students. This updated English learner practice guide, "Teaching Academic Content and Literacy to English Learners in Elementary and Middle School," provides four recommendations for teaching complex content to English learners while simultaneously building academic language and writing and oral language proficiency. This updated practice guide builds on the work of the first practice guide on English learners, expands the grade range from K-5 to K-8, and incorporates instruction in mathematics, science, and social studies, as well as literacy. With techniques found in this guide, teachers can effectively address English learners' content and language needs by systematically--and at times explicitly--building students' English language and literacy, while teaching history, mathematics, science, and other disciplines. The four recommendations include concrete guidance on: (1) Teaching English learners academic vocabulary intensively within the context of an engaging piece of informational text; (2) Helping English learners make sense of the content area material; (3) Supporting English learners as they learn to generate well-organized essays that are progressively longer and more complex; and (4) Providing struggling English learners with high-quality instructional interventions in reading and English language development. Like all other practice guides, this updated practice guide is based on research that has met the rigorous standards set by the What Works Clearinghouse, capitalizing on recently conducted research on content learning and academic language. The research base for this guide was identified through a comprehensive search for studies evaluating instructional practices for teaching academic content and literacy to English learners in K-8. Appended are: (1) Postscript from the Institute of Education Sciences; (2) About the Panel and Research Staff; (3) Disclosure of Potential Conflicts of Interest; and (4) Rationale for Evidence Ratings. A glossary is also included.