I don't really like the author's distinction between 'serious' games where "serious games have education as a primary goal while video games focus on entertainment." That said, this is nonetheless an article worth reading on the task of evaluating educational achievement within games. Methodologies (which will be familiar to game players) include passage through tutorial sessions, game scoring, levels, completion evaluation and more. And all of that said, I wonder how much truth there is in this: "[Serious games] will not grow as an industry unless the learning experience is definable, quantifiable and measurable," Corti says. "Assessment is the future of serious games." Via ADL.