A complete music theory course for level 9 students. The course is taught in an online format, where students watch videos and explore interactive exercises to learn music theory concepts. The concepts are reinforced with the written exercise in the workbook. Concepts in level 9 include: chromatic and diatonic half steps, major, minor, perfect, augmented, and diminished intervals, enharmonic equivalents, melodic composition, time signatures, minor scales and key signatures, transposition, triad inversions, figured bass, part writing/four part harmony, lead sheet triads for major, minor, diminished, and augmented chords, vocabulary (Ad Libitum, Alto, Aria, Augmented Interval, Bass, Diminished Interval, Half Cadence, Harmonic Interval, Imperfect Authentic Cadence, Melodic Interval, Melody, Names of Scale Degrees, Parallel Keys, Perfect Authentic Cadence, Phrase, Prelude, Relative Keys, Semplice, Soprano, Tenor, and Whole Tone Scale), parallel major and minor key signatures, intervallic ear training, rhythmic dictation, melodic dictation, major/minor/diminished/augmented triad ear training.