The first book contains the material of the first grade, which consists of: the staff, the clefs, the notes, the rests, the time signature, the tempo, the direction of easy time measures, simple and compound meters, incomplete measures, tied notes, double tied notes, legato connection, accidentals, tones, semitones, the tritone, homophony, consonant intervals, the scale, the degrees of the scale, major scales, key signatures, and major harmonic scales.