One problem for ESL teachers is that we can become complacent and start to take shortcuts. One day, part way through my career, I realized that this was happening to me.
I was teaching a TESL methods course to American university students who wanted to teach ESL. During one class, a student asked me what to do if some students aren’t doing the assignments or not doing them seriously. I told them that the most important motivator is to always introduce an assignment with an explanation of its purpose and how this assignment will help them in the short- or long-term future. WAIT! I suddenly realized that I had become lax in doing that in my own ESL classes.
For a dozen years, I had had the good fortune of teaching at colleges in Asia. For the most part, the students there were diligent about doing whatever I assigned without question. I soon fell in the habit of just tell them what the assignment was when I introduced it.
For example, in a Writing class, I might say, “We are going to do some practice with dramatic introductions. Look at pages 17-19. There are eight introductions. Two of them are dramatic. After you read each, you will identify which are dramatic.”
Or for a grammar exercise, I might say, “We are going to practice the most common places to use commas in sentence. Look at page 194. Let’s do the first exercise together.”
Or for a conversation activity, I would say, “Today, you will work with a partner and give directions to each other to find places on a map.”
I asked him how he felt about it. He said that he was feeling discouraged because he really tries to be active in conversation, not only telling his ideas and opinions but also responding to and including other. So he 
Common Sense Teaching ESL 