Very basically, some schools have certain classes with a high enough difficulty level that they weight them in order to keep the students that challenge themselves with these classes from seeing a drop in their GPA. The normal scale is A=4, B=3, etc. A weighted scale is, literally, A=5, B=4, and so on. The problem is that usually these classes aren't any more difficult than the same classes being offered by different schools that don't weight classes. Colleges are now on to which schools weight their classes and know that the GPA is probably inflated. The valedictorian of my class had a 4.3 GPA. This can depend on a lot of things. If you want to have a lot of choices and choose later, then there's no harm in applying to a lot of schools. The problem is that there is almost always an application fee, so it can cost $200-$300 to apply to a lot of schools if you go that route. I would say to get yourself a list of your top 3-5 choices and apply to those. Considering your scores, you shouldn't have a problem getting in to at least one of them. But worst-case scenario is that they all turn you down and you still have time to apply to your second list of schools. Just make sure to start applying as soon as allowable, for two reasons: you'll have time to apply to those other schools if your first list turns down, and there have been some years recently where some UW schools put a freeze on applications because the incoming class is already too big. The earlier you're in, the less you'll have to worry about the chance that this might happen.