Grace Vandendool's thorough approach to keyboard theory offers students easy-to-understand lessons and plenty of reinforcement activities. The progressive Preparatory Series and Theory Series include visual aids that strengthen the connection between theory and practice, laying the groundwork for success in the study of harmony. For intermediate to late-intermediate level students, this series enriches the study of piano by clearly explaining the building blocks of music. Students learn the basic elements of music theory, with concepts organized into three progressive levels with Answer Books for Intermediate and Advanced.

Advanced Rudiments addresses enharmonic notes and scales; C clefs; tetrachords; Contemporary music; compound intervals; augmented and diminished triads; dominant and diminished 7th chords; writing cadences in keyboard style; hybrid time; transpositing for orchestral instruments; ornaments; common terms and signs; and analysis.