<p>Absolutely, yes. I believe that if a class is taught in English, then the teacher’s English should be easily understood. </p>
<p>That reminded me of this story: When I was in college, I had a professor with Bell’s Palsy (facial paralysis) who was so difficult to understand, but no one wanted to complain. We would record the class and play it back and try to decipher what some of the words were, sometimes to no avail. :(</p>