What’s the link between time in school and achievement?

Jennifer Davis and Emily McCann:

There is perhaps no more eloquent statement on the essential link between time and learning than the National Education Commission on Time and Learning, which delivered its report in April 1994. In its highly-quotable declaration, the commission makes very clear that unless the education system is completely reconfigured around the objective of achieving proficiency, rather than meeting arbitrary time requirements, we will never reach the goal of serving all children well. In the commission’s words:
“Learning in America is a prisoner of time. For the past 150 years, American public schools have held time constant and let learning vary. The rule, only rarely voiced, is simple: learn what you can in the time we make available…. If experience, research, and common sense teach nothing else, they confirm the truism that people learn at different rates, and in different ways with different subjects. But we have put the cart before the horse: our schools and the people involved with them-students, parents, teachers, administrators, and staff-are captives of clock and calendar. The boundaries of student growth are defined by schedules for bells, buses, and vacations instead of standards for students and learning.”