As any middle school choir director knows, change is the name of the game! A changing voice is just one of countless physiological and emotional changes that middle school students experience. Knowing the general limits of male and female changing voices, as well as the specific capabilities of your students, are two keys to building healthy-and happy!-middle school singers. This book is an accessible, must-read resource for any middle-school choir director looking to foster stronger, more capable musicians, and offers 25 warm-up exercises along with customized grade-specific tips for using them along with free access to accompanying audio recordings.