Heather McDougall

Philadelphia's All City Music Program has been teaching kids for over 70 years. The All City Orchestra Summer Academy—ACOSA, now in its second year—is going one step further, teaching the technology skills students need to share their music in 2020 and beyond.

Matt Genders Photography

About 100 years ago, composer and teacher Nadia Boulanger was among the most influential, newsworthy figures in the world of classical music, leaving an indelible mark on countless composers of the 20th century and the craft itself.