Actually, I have an article published in Biological Reviews of the Cambridge Philosophical Society which is an expanded version of a paper from a class. The professor who taught the class is my co-author.
I only got a B on the paper.
Surely, you needled Said Professor over this very point?
Nah, it was deserved - the concept, data, and analysis were good, but the paper was badly written. It took a long time, and much effort, from both of us to get it to a point where it was publishable. He did, however see the potential in the paper, and
pushed me to proposed that I make it into a manuscript. He helped me in innumerable other ways as well, when my a**hole Master's Adviser was making my life hard.
But is the BRCPS a class, Mouseman?
No, but it's classy ;-)
Of course my point was that using unpublished material from a class in a publication is quite acceptable. Said professor is one of the most ethical scientists I know. Other people have actually complained about his rigidity on ethical matters, so if he had no problem with this, than I am sure that there is no ethical issue whatsoever.