Education is the civil rights issue of our time. That’s what Leslie Cornfeld decided after a decade advising New York City Mayor Michael Bloomberg and President Obama’s two education secretaries — and seeing how few low-income students went to the universities that lead to high-paying jobs. Cornfeld said she spent part of her time in the Obama administration visiting the nation’s Title I high schools, those with a high percentage of low-income students. She recalled: “We heard the same themes