But that's not true; I get the sense you're new out there, but Clark County is absolutely enormous and covers everything from Las Vegas/Henderson/Paradise/Summerlin to population centers from down in Laughlin (70 or 80 miles south, on the California/Arizona border) up to Mesquite (70-odd miles north of the city) and all the ranching communities in between.
It is a giant municipality and incomparable to Syracuse or Onondaga County; the school district is nothing like any mid-sized urban one.
And, regardless of that, graduation rate isn't a metric with a ton of merit.
Signed,
Your fellow 'Cuse hoops realist, current City of Syracuse resident who's lived in several other cities, and semi-frequent traveler to Las Vegas and the great desert Southwest.