XBLA has shooters, puzzle games, and platformers. What it's missing is a great quiz game. THQ hopes to fill that hole this October with the release of Are Your Smarter Than a Fifth Grader? Based on the hit TV game show, Fifth Grader tasks you with answering a series of questions elementary school kids are taught. Sound easy? Ah, but it's been so long since you had to know whether or not the Earth was round.