Black students are four times as likely to be suspended from charter schools as white students, according to a new analysis of federal education data. And students with disabilities, the study found, are suspended two to three times the rate of nondisabled students in charter schools. These inequities are similar to those in traditional public schools, where black and disabled students are disproportionately disciplined for even minor infractions, and as early as preschool — although on average, charter schools suspend pupils at slightly higher rates than traditional public schools…