Lucy et al ....just a shot in the dark as it is an awfully long time ago that I sat on the wrong side of a board...have you been visiting your local airport/centre and watched what the people there do? A few well placed questions regarding flight progress strips and pressure settings might just give you the information you need.
I don't think I would like you to act dumb..I would like to see you being able to work a problem through and modify it if it needs adjusting...thats what I do on a daily basis with real traffic.
Most units are well equipped to deal with potential students and in fact may have one or two recently qualified (or still at the college)types who will be able to relate to your problems and may have even had the same problems as your self.I know on my unit we have two or three people who actually DO the interviewing so they would be able to help...keep trying!and good luck .