Book excerpt: This volume examines linguistics, language acquisition, and language variation, emphasizing their implications for teacher education and language education. A majority of the essays consider issues in second language acquisition, dealing specifically with learners and instructors, or concentrating on the larger social and societal context in which learning and acquisition occur. Topics highlighted include the current and often controversial debate over bilingual education, language variation, and the past, present, and future role of linguistics in language pedagogy.