(Willis). The Dozen a Day books are universally recognized as one of the most remarkable technique series on the market for all ages! Packed with delighful exercises designed to improve technique and build confidence, this series turns practice into play. While the series is named Dozen a Day , the exercises are meant to be broken down and learned in groups of two or three before moving on. Once the first dozen or Group I has been mastered and perfected, Group II may be introduced in the same manner, and so on for the other Groups. The exercises can even be transposed to different keys to add a challenge when needed. This Preparatory book is the perfect place to start when beginning the series! Whether you're just starting out or looking to brush up on your basics, each simple exercise prepares your fingers for more challenging pieces down the road. An essential series for beginning pianists of all ages!