I agree with Redleg. And it holds for just about any subject. The quality of the course is entirely dependent upon the instructors. I had a history class once taught by the curator of the LBJ Library at the time. Amazing class. He'd bring in stuff. Incredible stuff. He passed around a little lead object once, in class. Asked us to tell him what it was. When it got to me, I saw that it was a sort of distorted ovoid of lead with what looked like teeth marks in it. I suggested that it was a bullet, just on a hunch. Turns out it was a bullet. A Civil War bullet used by a battlefield surgeon to give to his un-anaesthetized patients to bite down upon while in pain. Man, what a class that was. You never knew from day to day what you'd see in class; but all of it was directly to the point we were studying at the time.