Just came across the Games for Educators site, a web site with a host of resources for those in K-12 education. One of its most useful features may be its searchable database of games. Search by age of learners, subject matter, the skills they impart (e.g. social skills, math, etc.) and even the environment best suited for it (after-school, in school, etc.) You can find it here: http://www.g4ed.com/index.php/game-finder#