New Principal Potocsky Welcome Message! New Sound School Principal Marc Potocsky thanks everyone for the kind greetings as he took this summer. New principal introduction letter. Espanol: New principal introduction letter. Outgoing Sound School Principal Rebecca Gratz hands off ceremonial PFD to incoming Sound School Principal Marc Potocsky. You Might Also Like Yale Recognizes Outstanding Sound Students August 30, 2018 Sound School Promotional Video June 11, 2018 End-Of-Year Morning Message from Principal Gratz June 22, 2020