Who gets better grades?

Who gets better grades? Boys or girls? Well this depends on how smart either of them actually are. Typically though, from the looks of it, it seems girls seem to get better grades. This is not for certain, but it is just from glancing over the subject. I usually never see girls get terrible, terrible grades. They usually do pretty good from the looks of it. This is all speculation. So who does get better grades? I don’t think it matters if they are boys or girls; smart people get good grades.