http://edu.blogs.com/edublogs/2012/02/making-a-creativity-friendly-school-timetable.html?utm_source=feedburner&utm_medium=feed&utm_campaign=Feed%3A+edublogs+%28Ewan+McIntosh+%7C+Digital+Media+%26+Education%29
the less fresh you are the better it is for your ability to think and act creatively: