This guide, provided by a partisan education policy public interest group, seeks to answer the most frequently asked questions about teaching, designing, and evaluating an English immersion classroom and the research underpinnings in favor of English immersion. This guide aims to help teachers and policymakers better understand what English immersion is all about and the specific difficulties that affect English language learners (ELLs) at different grade levels, especially older students. After an introduction by Linda Chavez, the guide is divided into three parts and nine chapters. Part 1, "Why English Immersion?" has two chapters: "Is One Year Enough? Can English Learners Attain Proficiency in One-Year Immersion Programs" by Christine H. Rossell; and "What Works? What the Research Says" by Russell Gersten. Part 2, "Nuts and Bolts" has five chapters: "English Immersion for All Grades: The Bethlehem, PA English Acquisition Program" by Ann Goldberg; "Teaching Juan and Maria to Read: Reading Instruction Techniques for English Learners in Primary Grades" by Janet Siano; "Teaching English to High School Students" by Richard K. Munro; "The Design and Implementation of an English Immersion Program" by Kevin Clark; and "Bibliography of Successful Reading Texts: Recommended Materials for Scripted English Immersion" by Douglas Lasken. Part three, "The Law" has the final two chapters: "It Works, But Is It Legal? What You Should Know About English Immersion Programs and the Law" by Jim Littlejohn; and "State Requirements for Educating English-Learners" by Anita Garcia and Cynthia Morgan. Numerous data-rich tables are included. (KFT)