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All City Orchestra Summer Academy

All City Orchestra Summer Academy Logo

All City Orchestra Summer Academy (ACOSA) is the Mann’s premier summer orchestra training camp for young instrumentalists. The Mann Center, in partnership with The Philadelphia Orchestra, the School District of Philadelphia, and Project 440, annually collaborate to facilitate this high-quality orchestra training experience at zero cost to local students. ACOSA is designed to serve students 6th grade to 12th grade and to provide a growth opportunity, guiding students to work on technical playing skills throughout the summer.

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Frequently Asked Questions

When is the Academy?

Summer 2022 – Exact dates TBD.

How many students get in?

While there is not a limit set for the number of students accepted into the program, ACOSA requires the diverse breakdown of instrumentation as is standard to an orchestra.

Our goal is to facilitate an orchestra comprised of 60-80 musicians.*

*Subject to CDC recommendations.

What is “Summer slide?”

“Summer slide” is the tendency for students, especially those from low-income families, to lose some of the achievement gains they made during the previous school year. Most students lose two months of mathematical skills every summer, and low-income children typically lose another two to three months in reading1. Furthermore, this loss compounds year-after-year, meaning, for every summer without access to educational resources, the achievement gap grows larger and larger between students.
Preventing summer slide is most effective when community organizations work together to encourage kids to read, practice their instrument, dribble a basketball, or generally engage with whatever it is they are passionate about2. Utilizing the summer months as a time to stay sharp on a respective skill is paramount to combatting summer slide.

How do I apply?

Applications for ACOSA 2022 will be available later this year.

What if I am not a student from the Greater Philadelphia area. Can I still apply?

If you are a student from outside of the Greater Philadelphia area, please give us a call or send us an email. We’d love to learn more about your situation and see if we can help you in becoming an instrumental part of the All City Orchestra Summer Academy.

Phone: (215) 546-7900

More Information

For more information on the All City Orchestra Summer Academy, please contact Naomi Gonzalez, Vice President of Education & Community Engagement, at

ACOSA Sponsors 2021