Mari Haneda is an Associate Professor of World Languages Education and Applied Linguistics in the Department of Curriculum and Instruction at the Pennsylvania State University, USA. Her research interests include the education of school-age EAL students, ESL teachers’ work and L2 language and literacy development.Hossein Nassaji is a Professor of Applied Linguistics in the Department of Linguistics at the University of Victoria, Canada. His research interests include SLA, corrective feedback, form-focused instruction, task-based teaching and classroom discourse.

It is impossible to overstate the role Merrill Swain has played in shaping the fields of applied linguistics and second language education. Through this unique collection of original papers authored by leading L2 scholars from around the world, Haneda and Nassaji have created a testament to Merrill’s numerous contributions – including her foundational work on communicative competence, the output hypothesis, and languaging – that are certain to continue to inspire researchers and practitioners for years to come.

• Preface: Jim LantolfIntroduction: Mari Haneda & Hossein NassajiPART I: Immersion EducationRoy Lyster: Pushing French Immersion ForwardTara W. Fortune & Diane J. Tedick: Context Matters: Translanguaging and Language Immersion Education in the US and CanadaSiv Björklund: Research Trends and Future Challenges in Swedish ImmersionPART II: LanguagingYuko Watanabe: The Role of Languaging in Collaborative and Individual Writing: When Pairs Outperform IndividualsTae-Young Kim: The Effect of Languaging on Students' L2 Learning Motivation: A Classroom-based ApproachRémi A. van Compernolle and Celester Kinginger: Second Language Concept-based Pragmatics Instruction: The Role of LanguagingPART III. Sociocultural Perspectives on Second Language Teaching and LearningHossein Nassaji: Collaborative Output: A Review of Theory and ResearchPróspero N. García: Promoting L2 In-service Teachers' Conceptual Development through Collaborative DialogueSharon Lapkin: Languaging in a Gerontological Context: From Conception to RealizationLinda Steinman: Mentorship as Mediation: Appreciation of Merrill SwainPART IV: Issues and Developments in Language as Social ActionElaine Tarone: Language Play and Double Voicing in Second Language Acquisition and UsePatricia Duff: Monolingual Versus Multilingual Language Use in Language Classrooms: Contested and Mediated Social and Linguistic PracticeMari Haneda, Brandon Sherman and Annela Teemant: Assisted Performance Through Instructional Coaching: A Critical Sociocultural Perspective.Joan Kelly Hall: An EMCA Approach to Capturing the Specialized Work of L2 Teaching: A Research ProposalConclusion: Hossein Nassaji and Mari HanedaAfterword: G. Richard Tucker