English language development or proficiency (ELD/P) standards promise to play an important role in the instruction and assessment of the language development of English language learner (ELL) pre-K-12 students, but to do so effectively they must convey the progression of student language learning in authentic school contexts for authentic academic purposes. The construct of academic English is defined as the vocabulary, sentence structures, and discourse associated with language used to teach academic content as well as the language used to navigate the school setting more generally. The construct definition is informed by a relatively modest number of empirical studies of textbooks, content assessments, and observations of classroom discourse. The standards of a state with a large ELL population and a large multi-state consortium are then reviewed to illustrate the role of the academic English construct in the standards' coverage of language modalities or domains, levels of attainment or proficiency, grade spans, and the needs of the large number of young English learners. Recommendations and potential strategies for validating, creating, and augmenting standards that reflect authentic uses of academic language in school settings are also made. (Contains 8 notes.)