I just completed it last Saturday and used an ordinary non-graphing calculator, pretty old school actually. When I logged in for the test there was an agreement that you would not access pages or unapproved calculators and I had to show the proctor my calculator. My coach gave me a PDF of sample questions and I found that the content in the preparation did not include some subjects. Basically I reviewed content looking at YouTube videos in addition to what was in the preparation work. I found that some of it was easier to understand when taught by someone else. I recommend studying sets and statements. I'm pretty old and had not had any math since my one (Algebra 1) class in high school. The exam was 69 questions about 2-3 on each topic but more on sets, statements and probability.