This is an area that is always a 'work in progress' for me. Although it has been a wile since I wrote my own exam, I remember some of the difficulties I faced. I remember some of the tests I thought were the best measurement of learning the students struggled with. It seemed like I was always revising questions. I guess that's part of the process though. Even with some of the standard tests that are used in my courses now, I find that some students interpret some of the questions in different ways.
