Teachers talk too much! http://teachinglearning.albapages.net/teachers-talk-too-much/
Most teachers talk too much. They enjoy standing up there, in front of a largely captive audience, and talking about what they know. It makes them feel important.Is that learning? Is that the best way to teach? Nope. Of course not.
Teachers should not talk more than 10 minutes in each class. The rest of the class time students should be doing something – practising what they have learned, be engaged in finding answers to questions their teachers have asked, be at work on a learning project, doing group work, pair-work. They should be learning actively. Research has shown that students taught by active learning, score a grade & a half higher than those who learn in traditional (boring) ways.