It’s 2015 and one Brooklyn middle school is about to receive a huge influx of new students.Reporter Chana Joffe Walt follows what happens when the School for International Studies’s 6th grade class swells from 30 mostly Latino, Black and Middle Eastern students, to a class of 103 —an influx almost entirely driven by white families.Everyone wants “what’s best for the school” but it becomes clear that they don’t share the same vision of what “best” means. Our newest podcast, “The Preventionist” is out now. Search for it wherever you get your podcasts.To get full access to this and other Serial Productions and New York Times podcasts on Apple Podcasts and Spotify, subscribe at nytimes.com/podcasts.To find out about new shows from Serial Productions, and get a look behind the scenes, sign up for our newsletter at nytimes.com/serialnewsletter.Have a story pitch, a tip, or feedback on our shows? Email us at serialshows@nytimes.com