Many of the children featured in this film are actual students of Ms. Tvaraz and were actually with her during the events (including the Carnegie Hall Extravaganza) that led to the establishment of the Opus 118 East Harlem Violin Program that helped to support Roberta in the public school system.
At the end of Roberta's first week of teaching, Brian visits her apartment to celebrate. When he enters the room, Roberta has just finished putting three large curlers in her hair on the left side. They disappear after the two of them kiss.
In one of the classroom scenes early in the movie, Streep is shown wearing boots; when the camera comes back to her later in the same scene, she's wearing shoes instead.
Roberta Guaspari: [to her students right before a big concert]
I want you all to take a second and just... breathe. Deep breaths. Now listen to me. I want you all to play from your heart. Forget about the audience, watch me, you'll do just fine. Just play from here.
Roberta Guaspari: [entering Dorothea's house after a stressful rehearsal for a huge concert]
Oh, I can't believe I *ever* agreed to do this! You should hear the Bach double. Ha-ha-ha! It's a *complete* disaster!