The Clark County (Nev.) district, which now has three year-round elementary schools, may increase that number to 68. The Las Vegas Review-Journal says that if the district follows its regulations for easing crowding on campuses, it may have to convert 65 elementary schools to an extended calendar. Clark County elementary schools are 19,400 students over capacity, according to a head count last week. On average, the district’s 217 elementary schools are 14 percent over capacity, relying on portable classrooms, bathrooms and even lunchrooms to make ends meet. Changing 65 schools to year-round in 2014 would increase annual costs by $20 million.