This collection turns a critical lens on Content and Language Integrated Learning (CLIL) research, making the case for a sociolinguistic-informed approach towards investigating social inequalities and making visible issues, processes and actors overlooked in CLIL research. The volume seeks to expand the borders of existing CLIL scholarship through situated ethnographic perspectives, highlighting the value of a critical sociolinguistic perspective in illuminating the relationship between the emergence of CLIL and specific socio-political and economic conditions in contemporary multilingual education. Drawing on examples from Europe, Latin America, Australia and Asia, the book focuses on exploring inequities in CLIL policy and implementation across different institutional contexts and demonstrates the ways in which CLIL extends beyond the classroom as situated in multiple and changing networks of interest, policy and practice. This book will be of particular interest to students and scholars in sociolinguistics, multilingual education, language policy and planning, and applied linguistics.