More than eight years after the No Child Left Behind Act was signed into law, some states still aren’t complying with its requirement that they report graduation rates for subgroups of students, such as English-language learners or economically disadvantaged children...A requirement for disaggregation of the graduation rate is “the best way to ensure that there’s not a perverse incentive to push kids out of school,” said Phillip D.C. Lovell, the vice president for federal advocacy for the Alliance for Excellent Education, a Washington-based policy and advocacy group.