You are absolutely right! The only thing I would add is that it is important to choose the appropriate type of exams for intro classes (the ones that verify und

You are absolutely right! The only thing I would add is that it is important to choose the appropriate type of exams for intro classes (the ones that verify understanding and hopefully intellectually entertain but do not excessively challenge) and for advanced classes (the ones that might even have unsolvable problems, there is an established understanding that a 100% is not expected, and that provide for a great sense of intellectual challenge (and achievement)).