this my third time taking a course with Penn. and something is going on with exam result. I might as well don't do any retake, or I need to stop my course with Penn. the same result I got on the first exam I usually make a ticking on the ones that are right and ex on the ones that are wrong.
then do a retake, now the ones that were right are now wrong. that never happen in any of the other courses I took with Penn. so please do something about this.