This unit introduces students to the study of bilingualism and multilingualism in individual, educational and societal contexts. Students learn about simultaneous and consecutive bilingualism and how bilingual families function. Case studies of multilingual societies are examined with a focus on how they manage linguistic diversity in the education system. The spread of English as a world language is considered with its implications for the status and teaching of other languages, for World Englishes and for linguistic human rights. Current research on English language teaching in development will be reviewed. Web access is essential.