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Gosh- this book is phenomenal! A friend of mine was required to get it for a graduate class as part of his Master's degree in Choral Music Education- and thought I'd enjoy reading it, as well. I will post an addition to the review as I finish the book- but I wanted to go ahead and post that I think it is excellently put together and very well-written. As a private voice and piano instructor (and an accompanist at a local high school) I've found myself putting a sticky note in many, many times for things I want to go back and reread or revisit.
I was lucky to take the class with the author of this book. Everytime I grab this to read, I can easily see her professionality on her face. This book is a very easy to follow even for student who have limited English skills, for those like me who get bothered by unnecessary heavy English words. In fact this book is a step to step teacher of its own. I found it very informative, drawing from very practical teaching settings. You be a teacher or a student, a beginner or advanced - it is the book for you.
This is a systematic book. It takes you to a point where you can help your students acquire their level of expertise. It is the book written by experience Professors in the field. The literature is made very tutorial and practical.