These first books in AlfredÂ's Lesson Enhancement Series introduce students to all major and minor five finger patterns in all 12 keys. The pentascales are divided into similar groups to promote ease in learning. Book 1 includes the Group 1 Keys (C, G, F major and minor) and the Group 2 Keys (D, A, E major and minor). Book 2 includes the Group 3 Keys (Db, Ab, Eb major and minor) and the Group 4 Keys (Bb, B, Gb or F# major and minor). In each book, technical exercises are provided in each key with an interesting teacher accompaniment. A short solo is included for each key, in addition to an optional teacher duet accompaniment. Two or three of these solos can be grouped together for variety in performance.