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Orchestra on Large Stage

Welcome to the InterSchool Orchestras of New York

InterSchool Orchestras of New York (ISO at Third) provides three orchestras for children who have been playing their instruments only a few years, one beginning-intermediate orchestra, one intermediate orchestra, and the advanced ISO Symphony. Admission to all groups is through auditions, which are held in the Spring.  September auditions will only be held for vacancies in the ensembles.

All groups rehearse weekly from early September through mid-May, and each gives concerts in concert halls and in community centers or schools. Instrumental coaches attend all rehearsals and play alongside their students offering assistance and encouragement in all ensembles except the advanced ISO Symphony.

ISO graduates perform with leading orchestras across the country. But whether students pursue careers in music or not, the ISO at Third experience is something that makes a difference for their entire lives.

How to Join

New ISO Students,

New ISO families can register and create an online Third Street account.  After beginning registration, new students must audition, which will determine final placement.


Current ISO Students

Current families can log in to your online account here to select and register for your intended 2021-2022 ensemble.  Don't forget to schedule your audition after registering. All current students in Carnegie Hill and Concert Orchestra must audition.   Your ensemble may be adjusted by Third Street following audition placements.


Questions?  Third Street's Student Services team is here to assist


Fees and Financial Aid

Tuition and fees are listed in the ISO on the website. Tuition is $2,000 annually. Tuition can be paid in monthly installments.

Financial aid is available up to 100% of tuition, and half of ISO’s students receive some aid.