I don't think it is any different from teaching at any other place. The basic principles are the same as I covered in my previous answer: Brijesh Kumar's answer to How do top teachers teach?
I don't care that I am teaching in IIT when I am in the classroom teaching. I don't care that they cleared JEE. I don't care that they are the "best brains" in the world. I care that I should give them the best possible knowledge in the best possible manner. That is all I care about.