The press releases from Chicago Public Schools seemed almost too good to be true: the city's graduation rate was rising more quickly than even its staunchest supporters might have predicted.

But what happened after reporters Becky Vevea and Sarah Karp uncovered discrepancies in those numbers, and raised serious questions about the city's dropout prevention polices and practices. Vevea (WBEZ) and Karp (formerly of Catalyst Chicago and now with WBEZ) talk with EWA public editor Emily Richmond about their award-winning investigation, the significant changes to district policy that have followed in its wake, and some examples of CPS programs that are making legitimate strides toward helping more students graduate.