Does a public school district that expands school choice provide better outcomes for students than a neighborhood-based assignment system? A recent paper by Blueprint Affiliate Chris Campos and co-author Caitlyn Kearns finds that in Los Angeles’ Zones of Choice program, school choice helped close the achievement gap by encouraging improvement in schools in disadvantaged neighborhoods. In this episode of The Atlantic’s Good on Paper, Jerusalem Demsas speaks with Chris Campos about why students improved in the Zones of Choice system, how school segregation fits into the conversation, and the role of principals in student outcomes.