Grades aren't really based on how smart you are, they're more based on completion of work than anything. Think about it, if you don't turn something in it becomes a 0 which, in turn, brings down your grade. I am a very smart individual when it comes to school, but I don't feel the need to do all the bullshit work. School doesn't challenge me. I make straight A's without paying attention; there's an indication on how much the American (or atleast my corporation) Education system blows.