Obama giving himself this grade reeked of false modesty, as he likely believes there is no grade sufficiently high enough...
His B+ is only a few points below an "A" - excellent. He'll have to come up with a completely new grading system when he's done. After all, he's only completed his freshman year. What will he think of himself after three more years??? I guess intention is more important than accomplishment. Good old "outcome-based" education and affirmative action for you.