Shadowing, an active and highly cognitive technique for EFL listening skill development, in which learners track heard speech and vocalize it simultaneously, is gradually becoming recognized. However, there remain a lot of mysteries and misunderstandings about it. This book uncovers shadowing in terms of theory and practice. This book cements shadowing as a separate technique from other similar techniques such as Elicited Imitation, Mirroring, and simple repetition, and provides ample empirical data to explain the function of Shadowing. It also elaborates on how Shadowing should be used in terms of materials, procedure, and learners' psychology, which would aid in instructors' use of Shadowing in teaching. A guide on a method effective in improving learners' bottom-up listening skills, this book will certainly prove useful to English Language learners and instructors in their linguistic pursuits.