Why All-Night Cram Sessions Are Bad

We've all pulled an all-nighter cram session before the finals, despite others telling us that studying all night is actually worse than getting a good night's sleep.
Well, now science has spoken on why staying up late is not the best strategy:

... a new study published in the journal Child Development finds that when teens don't get the sleep they need on a given night, the next day all kinds of things can go poorly.
"What we learned is that when kids cram, particularly at the expense of sleep, the next day they're more likely to have academic problems even though they spent more time studying that night," explains researcher Andrew Fuligni of UCLA.
"These findings may come as a surprise to many researchers, educators, parents and teens who assume that more studying will surely lead to better grades," says Amy Wolfson, a professor of psychology at the College of the Holy Cross in Worcester, Mass.
The study builds on a body of evidence that finds sleep and learning are inextricably linked.
"Lots of things happen during sleep," explains Helene Emsellem, director of The Center for Sleep and Wake Disorders in Chevy Chase, Md. "We don't just physically restore ourselves." We also process all the information we've gathered during the day. "We take the information and organize it and make all the connections," Emsellem explains. Without adequate sleep, students don't learn as well.

Allison Aubrey of NPR's Morning Edition has the story: Here.