St. Louis Public Schools will try a new approach to achieving academic excellence – turning over control of the troubled district to a private management company. William Roberti – a retired Army Reserve colonel who became a clothing executive – will become the interim superintendent of St. Louis Schools on Monday. He’s a managing director of a so-called “turnaround” corporation whose services have been sought by troubled companies around the globe. The district currently lacks full state accreditation. The firm’s plan calls for authorization of a restructuring plan to be approved by the School Board by mid-July.