2kidsnoanswers: I'm sorry, but I don't know the grading system offhand and can't find a resource that explains exactly what translates to each number, but the school does explain it. Approximately, a 6 is an A or higher (around 93%+), a 5 is at least a B, a 4 is at least a C+, and so on.
kdhindes: I have a friend from Texas! I'm a local boarder, so I talk to my parents a lot. I do have a lot of international friends, and they got homesick at first. However, I think there's so much to get involved in at campus that you're able to distract yourself from missing home. Obviously, it's a very personal decision though, and it's something you should think about with your parents.