Alfred's Basic Piano Chord Approach Theory, Book 1 composed by Willard A. Palmer, Morton Manus, and Amanda Vick Lethco. For Piano. Method/Instruction; Piano - Alfred's Basic Chord Approach; Theory. Alfred's Basic Piano Library. Beginner. Book. 48 pages. Published by Alfred Music (AP.2646).
The Theory Books are coordinated page-by-page with the Lesson Books, and reinforce the concepts through theory games and drills that are fun to complete.