They’re growing, despite union hostility. Charter schools reached a new milestone this year. According to the Center for Education Reform, more than 5,000 charters are now operating in 39 states and the District of Columbia. Considering that the first…They’re growing, despite union hostility. Charter schools reached a new milestone this year. According to the Center for Education Reform, more than 5,000 charters are now operating in 39 states and the District of Columbia. Considering that the first…