I'm not very happy right now, there's only three chemistry students in my class, and like all of you, we just sat the exam. Myself and one of the other students followed the rules, and brought in a scientific calculator, whereas the other brought in A CAS CALCULATOR. Our teacher wasn't there to meet us before the exam, and the examiners made it clear that we could only bring in a scientific calculator, but didn't bother checking what calculators we actually had. So the person who brought the CAS calculator in, got away with using it. I'm pretty frustrated, as there could have been notes on the CAS calculator. I'd love to dob on this person, but I'm not too sure how to go about it, because I can't exactly prove that he/she had it. Does anyone have any suggestions, or should I just let it go, and hope that there were no notes on this persons calculator?