I recommend 15 Reasons Why Daydreamers are Better Learners, posted by William Koch on Monday, 7 January 2013 at the informedED blog for your reading list.
"The student’s eyes drift to the classroom window and the teacher’s voice fades from consciousness.
The daydream begins. It’s a familiar scene, one we have likely both experienced as students and struggled against in our students as teachers. But daydreaming is not what it might seem. Recent research in both psychology and neuroscience makes clear that daydreaming is an essential part of mental processing, reasoning and, yes, even learning..."