What happens to a rural town after it loses its only school? Arena, Wis., is about to find out. Arena Elementary is the second small rural elementary school in two years to close in the district, nearly 300 square miles of rolling pastures and dairy farms in southwestern Wisconsin. The one in the neighboring village of Lone Rock closed last spring. The district now has just one open public elementary school, in Spring Green, nine miles away.The same scene is playing out across rural America.