I worked in an high school ESL dept for a couple of years. Before every
test, we had to go over EXACTLY how the scan-tron was to be filled out.....even showed a copy of a scan-tron on the overhead, and discussed the steps as we were doing them on they overhead copy.
I wondered thie exact same thing, and of course, being the quizitive (or pain in the rear lol) that I am, I asked why.
I was told many other countries do not use scan-trons, and that some people may have never seen them before.
I'm not sure if this may be a reason for the other students in your case, just thought I'd share what I've learned.
Then again, the lady who always made such a big deal about the explanations of the scan-tron was really anal...so who knows. :roll :roll :roll
Good luck in your education!