A key to closing the achievement gap between students who come to school speaking a language other than English and native English speakers is adoption of two-way bilingual immersion (TWBI) programs. The bilingual immersion approach fosters excellent academic achievement and positive school attitudes in students of any ethnicity who participate. It also makes students comfortable and competent in other cultures. Lindholm-Leary details the key features that make up different TWBI programs, notably the amount of instructional time spent in English and the time spent on the target language at various grades. Convincing evidence shows favorable outcomes of TWBI programs in terms of true oral and reading/writing bilingualism, high academic achievement comparable to or better than that of students in English-only curriculums, and improved attitudes toward studying and staying in school. (Contains 1 figure.)