The feature in this week’s issue of the Weekly is on the Academy for Urban School Leadership, a nonprofit organization based on the Northwest Side that’s been taking over failing public schools in Chicago and replacing the entire faculty and staff over the summer. They created this model, called “turnaround,” in partnership with Arne Duncan back when he was CEO of Chicago Public Schools, and now it’s being held up as an example for other cities. An article in the February issue of Philadelphia Public School Notebook gives a brief history of turnaround in Chicago over the past six years.