Outlines a framework for academic language learning that highlights the importance of focusing instructionally on meaning, language, and use. Reviews research that suggests that to develop students' academic language proficiency in bilingual or trilingual contexts, instruction must focus extensively on the processing of comprehensible input.…

Addresses recent advances in research and theory that relate to language shift in early childhood, cognitive, and academic consequences of bilingualism and second-language learning, and theoretical models for conceptualizing the development of bilingualism and second-language learning. Contains annotated bibliography. (47 references) (LET)

It is argued that cognitive/academic language proficiencies in first and second languages are interdependent and empirically distinguishable from interpersonal communication skills. This analysis is applied to the interpretation of data on the effects of bilingual education programs and on the age issue in second language learning. (PMJ)