Alfred's Basic Piano Library: Ear Training Teacher's Handbook 1A-4The Ear Training Teacher's Handbook and Answer Key is designed to be used with Ear Training Books 1A, 1B, 2, 3 and 4, which reinforce each concept presented in the Lesson Books and specifically focus on the training and development of the ear. Rhythmic, melodic and intervallic concepts are drilled throughout each book and each page is designed to be completed using approximately five minutes of the lesson time.