It was a teacher-experience that I would have paid good money for. My students had been working individually. With one minute left in the class, I softly told them that it was time to stop for the day. Some of them sort of jumped when they heard my voice and looked at the clock. Then a few of them slowly started to pack up their stuff. But most of them continued to read and write, finally standing up a few minutes later.
On my way home, reflecting on what I had just observed in that class, I realized that my students were probably in a state of flow. Deconstructing the lesson, I noticed that it contained many of the characteristic that researchers say promote flow. And after seeing my students’ responses, I became determined to apply as much as I could to future lessons. And that is what I have tried to accomplish in the sample activities below.
Why should we care about flow? Research has found that people who reportedly experienced flow in an activity tend to spend more time doing it and do it better. Also, they do it for intrinsic reasons; in other words, they felt enjoyment and satisfaction from the activity itself.
My students who seemed to have been in a flow state were probably experiencing characteristic described by researchers. They lost a sense of time; what they were doing seemed effortless; and they were especially focused.
I discuss this posting in this video: 
Common Sense Teaching ESL 