When our son Idris was 4 years old, he was accepted to the Dalton School, a prestigious private school in Manhattan. Idris would become one of only a few black boys in a kindergarten class of about 90 students, where tuition rivaled that of private colleges. We decided to document this new world, following Idris over 13 years through graduation. (The story of Idris and one of his close friends became our feature-length documentary “American Promise,” from which this Op-Doc video is adapted.) What began as an exploration of diversity in New York’s elite private-school world grew into a story that touches on larger themes of identity, race and class in American society.