It follows a paper, published in 2014, in which he noted that, when children are around ten, their biological wake-up time is about 6.30am; at 16, this rises to 8am; and, at 18, someone you may think of as a lazy teenager actually has a natural waking hour of 9am. The conventional school starting time works for 10-year-olds but not 16- to 18-year-olds. For the older teenagers, it might be more sensible to start the school day at 11am or even later. “A 7am alarm call for older adolescents,” Kelley and his colleagues pointed out in the paper, “is the equivalent of a 4.30am start for a teacher in their 50s.”
Why does Kelley mention teachers in their 50s?
To explain how unnatural it is for teenagers to wake up at 7am To show how teachers are suffering due to the current school start time To argue that teenagers are lazy in comparison to their teachers To show that teachers agree with the observations Kelley makes