<p>Don’t use those credits for classes related to your major. There is actually a huge difference between AP classes (I’m sure IB is similar to it) and college class material. If you don’t have to take any classes after that one (like the US History class–unless you are a history major then you won’t be building upon it) then it might be a good idea to use that credit. Although you can’t be completely sure on getting A’s in those classes, it could also be good to take those classes to help your GPA.</p>