I've taken the DAT twice. Once with scratch paper and a #2 and once with the dry erase method. If they don't give you scratch paper when you are being fingerprinted, ask for it. The dry erase is much much more frustrating (smaller writing area, need to erase before doing the problem, crappy dried out pen, smelly ink, writing size is unfamiliar). You could also call the testing center before the big day and ask for paper and pencil.