Heritage language (HL) learning and teaching presents particularly difficult challenges. Melding cutting-edge research with innovations in teaching practice, the contributors in this volume provide practical knowledge and tools that introduce new solutions informed by linguistic, sociolinguistic, and educational research on heritage learners. Scholars address new perspectives and orientations on designing HL programs, assessing progress and proficiency, transferring research knowledge into classroom practice, and the essential question of how to define a heritage learner. Articles offer analysis and answers on multiple languages, and the result is a unique and essential text—the only comprehensive guide for heritage language learning based on the latest theory and research with suggestions for the classroom.

An increasing number of U.S. Latinos are seeking to become more proficient in Spanish. The Spanish they may have been exposed to in childhood may not be sufficient when they find themselves as adults in more demanding environments, academic or professional. Heritage language learners appear in a wide spectrum of proficiency, from those who have a low level of speaking abilities, to those who may have a higher degree of bilingualism, but not fluent. Whatever the individual case may be, these heritage speakers of Spanish have different linguistic and pedagogical needs than those students learning Spanish as a second or foreign language.

The members of the American Association of Teachers of Spanish and Portuguese (AATSP) have identified teaching heritage learners as their second greatest area of concern (after proficiency testing). Editors Ana Roca and Cecilia Colombi saw a great need for greater availability and dissemination of scholarly research in applied linguistics and pedagogy that address the development and maintenance of Spanish as a heritage language and the teaching of Spanish to U.S. Hispanic bilingual students in grades K-16. The result is Mi lengua: Spanish as a Heritage Language in the United States.

Mi lengua delves into the research, theory, and practice of teaching Spanish as a heritage language in the United States. The editors and contributors examine theoretical considerations in the field of Heritage Language Development (HLD) as well as community and classroom-based research studies at the elementary, secondary, and university levels. Some chapters are written in Spanish and each chapter presents a practical section on pedagogical implications that provides practice-related suggestions for the teaching of Spanish as a heritage language to students from elementary grades to secondary and college and university levels.

There is growing interest in heritage language learners—individuals who have a personal or familial connection to a nonmajority language. Spanish learners represent the largest segment of this population in the United States.

In this comprehensive volume, experts offer an interdisciplinary overview of research on Spanish as a heritage language in the United States. They also address the central role of education within the field. Contributors offer a wealth of resources for teachers while proposing future directions for scholarship.

In the last three decades the field of endangered and minority languages has evolved rapidly, moving from the initial dire warnings of linguists to a swift increase in the number of organizations, funding programs, and community-based efforts dedicated to documentation, maintenance, and revitalization. Sustaining Linguistic Diversity brings together cutting-edge theoretical and empirical work from leading researchers and practitioners in the field. Together, these contributions provide a state-of-the-art overview of current work in defining, documenting, and developing the world's smaller languages and language varieties.

The book begins by grappling with how we define endangerment—how languages and language varieties are best classified, what the implications of such classifications are, and who should have the final say in making them. The contributors then turn to the documentation and description of endangered languages and focus on best practices, methods and goals in documentation, and on current field reports from around the globe. The latter part of the book analyzes current practices in developing endangered languages and dialects and particular language revitalization efforts and outcomes in specific locations. Concluding with critical calls from leading researchers in the field to consider the human lives at stake, Sustaining Linguistic Diversity reminds scholars, researchers, practitioners, and educators that linguistic diversity can only be sustained in a world where diversity in all its forms is valued.