(Libby Kamrowski Kenny/Staff Photographer)CUMBERLAND CENTER — Greely High School athletes are taking to a new turf field this season, as are middle schoolers playing frisbee in gym class. It was not the first time the turf field was considered as part of a larger SAD 51 project. Ten years ago, the board heard reports on a turf field project alongside proposals for a performing arts center. Played on for matches by the soccer, football and lacrosse teams, it only saw about 150 hours of play per school year, said Greely High School Athletic Director David Shapiro. At Greely High School, upwards of 60 percent of students participate in sports for at least one season.