Last week we talked with WBEZ Education Reporter Linda Lutton about her latest investigation. “The Big Sort”… a whole new level of tracking. Lutton found that Chicago Public Schools freshman are being sorted by achievement into entirely different schools. There’s been a lot of reaction to the story and the data. We talk to Michael Petrilli, executive vice president of the Thomas B. Fordham Institute on his reaction to the data. Photo: Flickr/US Department of Education