More evidence is in that charter schools – at least on average – do no better than regular public schools, reports the Christian Science Monitor. Middle-school students who were selected by lottery to attend charter schools performed no better than their peers who lost out in the lottery and attended nearby public schools, according to a study funded by the federal government and released Tuesday. This is the first large-scale randomized study to be conducted across multiple states, and it lends some fuel to those who say there is little evidence to back the drive for more charters. But the study also found more nuanced evidence that the charters that work best are those serving lower-income students, especially in urban areas…