Foundations for Multilingualism in Education: from Principles to Practice equips pre-service and in-service educators with the knowledge and skills they need to make informed language and literacy education decisions in multilingual schools. It also shows multiple pathways for advocacy through classroom and school practices and policy-making, and sets an agenda for research from a multilingual perspective. This foundational text takes a comprehensive, pluralistic approach to theory and research on multilingualism in education. De Jong goes beyond traditional discussions about "the best bilingual or multilingual model", and introduces four core principles that are applicable across a wide range of multilingual contexts: 1) Striving for Educational Equity, 2) Affirming Identities, 3) Promoting Additive Bi/Multilingualism, and 4) Structuring for Integration. Readers learn to apply these principles to practice, policy-making, and research in bilingual, multilingual, and English-medium school contexts.