Is it Moodle? There are already plenty of ways to check one's grades, actually. Colleges often use Blackboard - although I think students and professors alike would agree that using Blackboard is only a little bit better than having cancer. I want to fill in the gap where there is no system offered or it's incomplete, leaving students on their own. Of course, there are already two players - Schoolhouse, a quite sexy (if over-featured) Mac app, and some outdated online grade tracker.