The book describes voice change as a whole-body experience for adolescents, both female and male, which, while not always easy, should not scare music teachers away from working with adolescent singers. Many aspects of adolescent voice change are addressed throughout this book, but there may be exceptions to what is discussed. Everyone has an endocrine system that contains glands to produce hormones, but this system is sometimes influenced or disrupted by biological makeup, environmental conditions, or malnourishment; in addition, some people are diagnosed with atypical chromosomal structures. As a result, it is acknowledged that not every person on the planet does, in fact, experience a voice change. The focus of Thinking Outside the Voice Box remains on adolescent females and males who are engaged in the singing process and experiencing symptoms and expectations of a “typical” adolescent voice change.