That's what I did. I don't know what the rules are at your testing center, but where I took it we were only allowed two whiteboard sheets at a time, so keep that in mind. If you write a lot during the chemistry sections, I would get two new sheets at the beginning of your break since you have to turn in used ones in order to get new ones. You don't want to write everything down and then not have any space to use during the test. Mine didn't wipe off very easily, so I wouldn't count on being able to do that if you run out of space. My only other advice is if they offer you noise canceling headphones, take them! Good luck!