The first book contains the material for the first grade, which consists of: the staff, the clefs, the notes, the note signs, the musical meter, the interval, the direction of easy musical meters, simple and compound meters, the incomplete meter, the dotted notes, the double dotted notes, the tie, the accidentals, the tones, the semitones, the tritone, the unison, the enharmonic notes, the scale, the degrees of the scale, the major scales, the key signature, and the enharmonic major scales.