<p>It is one thing to have to deal with this issue in the “real world” when you have already obtained a good understanding of the knowledge required in your field ( isn’t that why you go to college) yet quite another when going to school and first learning. I am sure there are those you describe but there absolutely should be a requirement that professors are capable of communicating effectively in the classroom. A great deal of money is spent going to college to learn and you shouldn’t have to teach yourself because your professor can’t effectively relay his knowledge. Even 30 yrs ago I had a very difficult time in some science courses because of this issue.</p>