Now Registering for the 51st Season

Accepting auditions for most sections.  Join us for another year of musical celebrations.  Visit Third Street Music School for more information.

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Play with Us

Orchestra on Large Stage

Welcome to the InterSchool Orchestras of New York at Third Street

InterSchool Orchestras of New York (ISO at Third) provides three orchestras for students: beginning-intermediate orchestra, 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 give performances in concert halls and in community centers or schools. Instrumental coaches attend all rehearsals and play alongside their students offering assistance and support in all ensembles except the advanced ISO Symphony.

ISO graduates currently perform with leading orchestras across the country. Regardless of 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,

Current ISO Students

Current families can log in to your online account to select and register for your intended 2021-2022 ensemble.  Don't forget to submit 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 with your registration. Contact [email protected]tel:212-777-3240

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.