Generally, this is a very good course and I'm glad I took it. But there are definitely problems with some of the questions and some of the answers. Now, sometimes after we complete a section we are asked to review that section. By that time I have forgotten the specifics of the problems. It would be MUCH more useful if you allowed us to flag questions and/or answers in REAL TIME, and give you feedback about them along the way. Some of the answers are actually wrong, others are not correctly set up by the wording of the question, etc. etc. Let us mark the ones with problems, and let us tell you WHY we think there is a problem with the question and/or answer.