In this paper, the author argues that the theoretical groundings of code-switching are flawed, in that they rely on a flawed understanding of language. For code-switching to function as described by sociologists and educators, language would have to be a skill--and particular languages and dialects to be discrete subsets of this skill--to be…

Over the past 40 years, Jim Cummins has proposed a number of highly influential theoretical concepts, including the threshold and interdependence hypotheses and the distinction between conversational fluency and academic language proficiency. In this book, he provides a personal account of how these ideas developed and he examines the credibility…