Last week’s Memphis-Shelby County Schools Board of Education meeting provided yet another example of how differently the state’s two largest school districts choose to work with their public charter schools.MSCS school board members unanimously rejected a proposal to shut down four public charter schools that have been designated as Priority Schools.  Arrow Academy of Excellence, Memphis Business Academy Hickory Hill Middle School, KIPP Memphis Academy Middle, and KIPP Memphis Collegiate Middle all made the Priority Schools List for the first time this year.