The official graduation numbers that Mayor Rahm Emanuel touted throughout his first term and his re-election campaign were actually wrong. Chicago Public Schools has now revised the numbers down 2 to 3 percentage points for every year dating back to 2011.
WBEZ and Catalyst Chicago bring a first-ever analysis of graduation rates for every public high school in the city. Half of all high schools hold on to less than 50 percent of the students who walk through the doors as freshmen.
The nation's high school graduation rate is the highest since 1976, but more than a fifth of students are still failing to get their diploma in four years, the Education Department said in a study released Tuesday.