When I took the Compass, a calculator was available as a link on your actual exam (taken on the computer obviously). Prior to the exam, I went to the bookstore and they have a bunch of preperation type books for math exams -they don't specifically state they are for a compass exam but pretty much all the same - I studied out of those and ended up testing out of all my math courses through the compass exam! Most bigger chain bookstores have a lot to choose from (and also have a little place to drink coffee and eat goodies!!) so I would just take a notebook, calculator and pen with me and study for an hour or two a couple times a week - stinks having to study BEFORE you get into your classes but when you have the oportunity to test out of those classes - makes it worthwhile!! Good luck!