The OECD series Making Integration Work summarises, in a non-technical way, the main issues surrounding the integration of immigrants and their children into their host countries. Each volume presents concrete policy lessons for its theme, along with supporting examples of good practices and comparisons of the migrant integration policy frameworks in different OECD countries. This fifth volume explores the issue of language learning for adult migrants, addressing methods to ensure such training is provided in an efficient and effective way, taking into account migrants’ different starting points and circumstances.