In many parts of the world the language education scenario is increasingly dynamic, as demographic, economic and social changes powerfully influence socio-political agendas in the sphere of language education. These in turn impact on complex issues such as linguistic pluralism, multiculturalism, and marginalization. This is especially so in the sphere of second language education where local, national and regional concerns often dominate the objectives underpinning policy choice and prioritisation. This volume brings together scholars and researchers from a wide range of different educational contexts and turns a sociolinguistic lens on some of the key areas of concern for researchers in language education: critical awareness of power and identity issues; competence in dealing with new sociolinguistic repertoires, modalities and literacies; ethical concerns for all who are involved. The 'case study' approach enables the reader to reflect on and critically engage with these issues in a rich variety of contextual situations, and the volume as a whole provides a useful overview of (second) language education in the world today.