Yes, and I believe many colleges make it intentionally difficult. My Calc I class was given by an instructor with a heavy Asian accent. I had to struggle to understand every other word.

My Chemistry for Engineers class was in a large classroom that was under construction.

Needless to say, I went for MIS instead of CS/EE. I ended up taking many CS classes, so it worked out well.

On a side note, teaching is really difficult. Knowledge of the subject is the minor skill. My parents were teachers and I considered it in college but didn't have the patience.