PHILADELPHIA - Philly principals' union is calling for a vote of no confidence vote in Superintendent William HiteLeading Pennsylvania's largest school system for eight years, Hite is in the crosshairs of the 670 member school principals and administrators union which has posted a change.org petition calling for a “vote of no confidence."The petition accuses Hite of failing to educate students, keep them safe and manage the district’s money."Stakeholders want a say in what’s going on in the district’s efforts as it relates to work conditions and accountability," Robin Cooper, president of the Association of School Administrators, said.124,000 students attend Philly public schools and another 75,000 in charters.