Mary Carskadon Sleepy Quotations

This can put their circadian rhythm, or biological clock, in conflict with the school bell, ... The result illustrates a critical trend: too many teens come to school too sleepy to learn. And their fatigue often leads to behavior problems that contribute to a negative overall school performance and experience.

Kids are too sleepy to learn well. They're too sleepy to be happy. And they're at great risk for such things as traffic accidents.