Gregg Breinberg has been directing the chorus at Public School 22 on Staten Island for twenty years. He tells his fourth and fifth grade students that participation is not about whether they can sing on key or not. It’s about expressing the meaning of a song — and the music inside themselves. Today, we listen to the voices of P.S. 22 as they harmonize from afar. Subscribe today at nytimes.com/podcasts or on Apple Podcasts and Spotify. You can also subscribe via your favorite podcast app here https://www.nytimes.com/activate-access/audio?source=podcatcher. For more podcasts and narrated articles, download The New York Times app at nytimes.com/app.