Bilingualism in Schools and Society provides a clear and engaging introduction to key issues surrounding bilingualism in educational and social contexts. This third edition expands on core sociolinguistic concepts, including code-switching, translanguaging, flexible bilingualism, and code-meshing, offering a more nuanced view of how language practices evolve in diverse, multilingual environments. Designed for advanced undergraduate and graduate students, it explores how individuals and communities use multiple languages—in schools, the media, and digital spaces—while also considering the personal and cultural dimensions of living bilingually in a globalized world. Shin examines current educational policies and assessments affecting English learners, including updates on the Common Core State Standards, WIDA, ELPA21, and the Every Student Succeeds Act (ESSA). With new content on community-based heritage language programs and their connections to K–12 schools and post-secondary institutions, the book reflects the latest developments in bilingual education and policy. Each chapter includes suggested readings, online resources, and study questions to support critical thinking and classroom discussion. Grounded in empirical research, updated statistics on bilingual populations, and multilingual case studies from around the world, this textbook is ideal for courses and students preparing for careers in language education, linguistics, or educational policy.