Photo-Illustration: Intelligencer; Photos: Getty As freshmen settle in for their first year of college, their arrival on campuses marks a milestone higher education has long dreaded: this incoming class is the last big one before a prolonged decade-plus drop off begins. Starting this year, the graduating classes of high schools across the country are getting smaller, the result of fewer people having children during the Great Recession and the years after. Even after the economy rebounded, the