NPR (National Public Radio) of the US has a series on what makes a great teacher.
http://www.npr.org/blogs/ed/2014/11/08/360426108/five-great-teachers-on-what-makes-a-great-teacher?utm_source=npr_newsletter&utm_medium=email&utm_content=20141116&utm_campaign=mostemailed&utm_term=nprnews