For reinforcement of each principle as it is introduced, supplementary material is carefully coordinated, page for page, at each level of instruction. Coordinating supplemental books for Level 4 include: Classic Themes * Duet * Ear Training * Merry Christmas * Musical Concepts * Recital * Repertoire * Sight Reading * Technic * Theory and Top Hits! Solo, Christmas and Duet books. Songs include: America the Beautiful (Ward) * The Battle Hymn of the Republic (Steffe-Howe) * Black Forest Polka * Blow, Winds, Blow! * Calypso Holiday! * Comedians' Dance (Kabelevsky) * Farewell to Thee (Aloha Oe) * Gypsy Dance * Haunted House * He's Got the Whole World in His Hands * The Hokey-Pokey * The House of the Rising Sun * The Magic Piper * Musette (Bach) * Olympic Procession * Pomp and Circumstance No. 1 (Elgar)* Prelude in A Minor * Space Shuttle Blues * Spinning Wheel * Swingin' Sevenths * Tarentella * Waltz in G Minor * Waves of the Danube (Ivanovici)