Theory & Ear Training Party books correlate with their respective level Piano Party books. They provide reinforcement of the concepts presented in Piano Party, especially through listening and writing plus improvising and composing activities. Students learn through sequential games and exercises designed to hold their interest. Book B continues with a variety of pieces in pre-staff notation. Steps and skips, crossing-hands-arpeggios and I chords in C, G, F, the two-note V7 chord, and counting rhythms (three eighths, single eighths, and dotted quarters). The staff is introduced by identifying and writing skips.