Student enrollment in Fairfax County schools surged past 180,000 for the first time as classes resumed Tuesday, a development that poses major logistical and academic challenges for the region’s largest school system, reports the Washington Post. Over five years, the student population in the county has climbed more than 9 percent to an estimated 181,500. That translates to an additional 15,000 students since 2007, or more than the entire enrollment of Alexandria public schools…