I agree with Harry. IMHO, "Auftrittsverhalten" is just another word for behaviour (in this case, it's the teacher's behaviour in the classroom).

"Professional behavior includes being aware of your body language. Did you know that we communicate more through our behavior and body language than through what we actually say? Research indicates that 55 percent of the message we are trying to communicate is delivered through our body language. It is important that the words we say, our tone of voice and body language are all working together to deliver a positive, consistent message.

You can demonstrate professionalism with the following behaviors and body language (...)"
http://inside.duke.edu/article.php?ParentID=9112&id=110§...

"The Power of Communication
Without speaking or telling someone how we feel, we can all communicate how we are feeling through our behaviour and body language."
http://www.mentalhealthcare.org.uk/content/?id=88

"Body language
All societies have ways (rules) that show respect, politeness and courtesy, and each culture has different rules.
We need to be aware of our own language and consder the language of other cultures when communicating.
Body language is part of the larger context of language, behaviour and body language.
Kinesics (movement added to meaning)"
http://www.multicultural.qld.gov.au/services_and_resources/t...