Teacher Wang is younger than teaching art; The teacher who teaches art is older than Miss Li. So Wang and Miss Li don't teach art, so Mr. Zhang teaches art. Mr. Zhang is older than the teacher who teaches music, so the music teacher is younger than Mr. Zhang and consistent with Mr. Wang. So Mr. Wang teaches music.
Teaching art
Teacher Zhang teaches art.
Teach music
Teacher Wang teaches music.
Train (sb.) in calligraphy
Teacher Li teaches calligraphy.