This book considers the past, present and future directions of innovation in US-based Intensive English Programs (IEPs), which provide international students with an immersion-style environment for learning academic English, prior to matriculating into a full-time college or university degree program. IEPs frequently serve as sites for pre-service teacher preparation, curricular experimentation and research, and yet little published work takes a critical look at the advantages and shortcomings of such programs. The chapters in this book provide a nuanced view of this microcosm of the English language teaching industry, demonstrating the various ways that IEPs have impacted and continue to influence the wider fields of Applied Linguistics and TESOL. They emphasize the unique positioning of IEPs within higher education and describe the various ways IEP practitioners can influence their host institutions and beyond.