Answers for all three levels of Excellence in Theory are contained in one Answer Key, which can be used by a teacher or by an independent student. Ear training examples and exercises are included for the teacher with the option of using a piano or other instrument in place of accessing the audio files found in the Kjos Multimedia Library at www.kjos.com. Product Details:10-digit ISBN Number:084970525813-digit ISBN Number:9780849705250Media:Music BooksLevel or Grade:1Series:• Excellence in Theory