I am working with a computerized Course Management System which provides many options for scoring a test or activity - one of them is "Average of All Attempts". I thought that was: 1) a bad idea, 2) would not be able to be manipulated. But I just saw a student repeatedly get just one question wrong (whether intentionally or not) before finally getting all correct, and it migrated the average upward from the first poor attempt. So, students can "adjust" their own results with this method. Not sure if they know it or not, but I would bet they are smarter than I am! (Or less naive.)
Has anyone else seen this? I think it would be mitigated by allowing only two attempts. Why would a Course Management System allow unlimited (or many) repeat attempts and an Average Score grading method? Maybe students should be designing the CMS, it would be more fair - perhaps more ruthless!