In this third episode of our 6-part series we examine how inequality is at work in the high-stakes world of high school, including how students are sorted and who gets disciplined. Brian Daugherity describes how white resistance to integration has produced new forms of segregation. Derek Black has brought legal action against school districts who use ability grouping to segregate students. Jo Boaler says if theres one place we shouldn't group students, its in the math classroom. And later in the show, we hear from Jason Okonofua who is working to improve teacher empathy and dramatically cut suspension rates. And we follow the work of the Holistic Life Foundation in Baltimore, Maryland, which uses mindfulness training to reduce conflict in classrooms and improve student performance. Produced by Lilia Fuquen.