Study

Chicago has tried some drastic fixes for its worst performing schools.

A study out Thursday from the University of Chicago’s Consortium on Chicago School Research says these shake-ups are having a positive impact, but it also confirms long-standing claims by some that charter schools attract more advantaged students.

The study looks at 36 elementary and high schools that underwent huge reforms. Some had all staff replaced. Others were closed and charter schools opened in their place. Most also received additional resources, sometimes totaling millions of dollars...