A Dozen a Day - Mini Book for Beginners by Edna Mae Burnam | Easy Piano Exercise Book for Kids and Students | Finger Strength and Technique Builder | Piano Warm-Up Songbook for Lessons
(Willis). The Dozen a Day books are universally recognized as one of the most remarkable technique series on the market for all ages! Each book in this series contains short warm-up exercises to be played at the beginning of each practice session, providing excellent day-to-day training for the student.
My daughter's piano teacher used this book with my daughter when she first started playing. It includes 5 groups simple to more advanced piano fingering exercises, divided into twelve (a dozen) exercises per group. The student is expected to master and perfect each group of a dozen exercises before proceeding to learn the next group. These exercises are meant to be warm-ups for piano playing.