I ****** up my freshmen and sophomore grades?

If you get F's, D's, and C's in many classes, then how the hell do you expect to get good grades in AP classes? AP classes are supposed to be close to college level. They are much harder than the classes you are currently taking. They are a lot harder than honors classes even. Also, 4.0 is he highest GPA you can get, you can't get higher than that. Will it hurt your chances a lot? YES!!!!!!!!!!!!!!!!!!!!!!!!! You might have to go to community college first before going to a four year university. Sorry to be harsh, but most people's grades don't improve dramatically, they stay about the same for all four years of high school. You can't really know what grades you will get in your last two years of high school, and in general Junior year is a lot harder than Sophomore year (Senior year tends to be a little easier, but only if you take easier classes.) I guess it depends on the reasons for your grades, but if you are getting bad grades because you don't understand the material, then there is no way you will be able to dramatically improve your grades next year.