This excellent article written by Robert J. Marzano is a pathway to engaging students. He presents 4 questions that teachers should ask themselves. Each question is carefully explained with specific examples by modeling key behaviors and understanding the psychology behind them. Well worth your time to read and reflect on your own answers to Marzano's questions.
Art and Science of Teaching / Ask Yourself: Are Students Engaged? Robert J. Marzano. March 2013 ASCD Educational Leadership