Which aesthetic theory do art teachers at school. use to grade their students?

a chromatic scale uses the twelve tones of the octave, while a regular scale only uses eight, or seven different notes (as the first note is played twice)

paul mccartney, john lennon, george harrison, and ringo starr are the members of the beatles an american band from liverpool that was formed in 1960. it is writing songs and performing their own music are the reasons that influenced many american rock artists and groups. their group was the perfect role model for the youth during their time.