Human language and cognition do not develop independently of each other but are intricately intertwined in various ways. This contribution presents the interplay between linguistic and cognitive abilities of learners at the individual level and relates them to the level of external contextual factors in social and educational environments. In…

Using input and outcome data from a randomized study of dual-language immersion programs in an urban district, we examine the mediating relationships of dosage, expenditures, and classroom characteristics to students' academic performance, and the moderating role of students' race/ethnicity. Differential costs of immersion were concentrated at the…

Professional development is central to teacher competence and, with particular attention to larger-scale, structured and formal professional development interventions (PDIs), this article discusses how the impact of professional development can be conceptualized and evaluated. Various kinds of impacts on teachers, organizations and systems, and…

A question commonly raised by teachers is the extent to which task-based language teaching (TBLT) is suitable for young beginners, but to date, very little research has examined how TBLT can be implemented with complete beginners. The purpose of this article is to document my attempt to introduce a task-based approach in order to see if such an…

Recommends an approach to computer-assisted language learning and development activities that addresses the total instructional system, including non-technological components. Eight procedural steps, based on an input-process-output model, are described for developing, refining, and evaluating the efficiency and effectiveness of CALL teaching…

After many years of attention to input that supplies classroom second language (L2) learners with positive evidence on L2 forms and features, recent studies have begun to identify and describe the negative evidence in "reactive" input, provided through interlocutor responses to forms and features that are used by learners, but are not…

Examines whether second-language (L2) learners' interaction with other L2 learners can address their input, output, and feedback needs for L2 learning in ways interaction with native speakers (NSs) had been shown to do. Results indicate interaction between L2 learners can address some of these needs, but it does not provide as much modified input…

Explores how the Learning Together form of cooperative learning influenced opportunities for acquiring academic English by second-language learners in a sixth-grade social studies classroom. Findings suggest that program developers must provide for context effect and teachers require a broad understanding of academic language. (59 references)…

This edited volume includes the following chapters: "Three Kinds of Sociolinguistics and SLA: A Psycholinguistic Perspective" (Dennis R. Preston); "Getting Serious about Language Play: Language Play, Interlanguage Variation, and Second Language Acquisition" (Elaine Tarone); "Oppositional Talk and the Acquisition of Modality in L2 English" (Tom…