<p>"The music activities listed by the OP are overlapping (3 choruses) and most high school chorus and jazz programs are fairly mediocre -- is it worth taking three of them?"</p>
<p>Correction: 2 choruses and jazz band (instrumental; she is going to play piano for it and very excited to try new genre after many years of classical music). Also one of the choruses (big and mediocre one) is mandatory for participation in another (small, prestigious, by auditions only). That's why she came to such an "ovelapped" schedule.</p>