This is an important study.  Of course,  for many years researchers have known that the teenager is a nocturnal being...with body rhythms that favor late night alertness and early morning grogginess.  This research has had virtually no impact on educational policy, the Board of Education, or even the Legislature.  Now we can calculate the number of hours of sleep, which is related, but not exactly the same.  The issue is not only how much they sleep, but when we demand full attention.   It is great that Kaimuki has had the flexibility to experiment.  Can this be translated into a policy for high school students?  Can research be linked to implementation across a system?   Individual and innovative risk takers may use it.  Perhaps the Board of Education could also become innovators as well.