CNN.com reports that as Los Angeles Mayor Antonio Villaraigosa prepares to take over the nation’s largest school district, experts believe he may want to lower his expectations. The state Assembly has approved a plan that will give Villaraigosa the power to directly manage the city’s 36 worst-performing schools. However, while mayoral takeovers have had some measure of success in some major cities like Chicago and New York, experts believe that they are by no means a cure-all. More than 600 Chicago public schools have been under the control of Mayor Richard Daley for the past 11 years. During this time frame, high school graduation rates have risen in addition to a rise in elementary test scores. John Easton of the Consortium on Chicago School Research at the University of Chicago believes that “for the most part, it’s been a pretty successful run.” However, not everyone agrees. Donald Moore, the executive director of the reform advocacy group Designs for Change in Chicago argues that the schools where Mayor Daley interfered with the least are the schools that improved the most…