Hi Kate: You've really summarized the tenets of courtesy and professionalism. We can lead by example. In doing so, we earn respect and probably more effort by the student to consistently try their best in modeling our practices. We can also speak about such things, but if they're not practiced, the students will notice, which could result in a lower opinion of the teacher by the students. That's unfortunate, but I think it happens and is one of many reasons to strive to be prepared and ready for all our classes. Regrads, Barry