On a recent weekday morning in Washington D.C., several hundred teenagers hurriedly made their way through their high school’s hallways in a frantic effort to get to class on time.
I know – nothing new there. Except that in this particular school, the hallways had ubiquitous electronic clocks that measured time in bright red numerals down to the second, and these particular students had just three minutes to move from one class to another. “They had five minutes last year,” principal Caroline Hill told me, in between passionate exhortations for her students to keep moving. “And it was a complete waste of time.”