Sleep expert David Earnest often tells college students that a good night’s sleep is important for academic success. Not that they listen to him. Earnest is a professor at Texas A&M College of Medicine. He explains that so-called “all nighters,” in which students spend all night studying instead of sleeping, are not effective, or healthy. The sort of common approach for college student is to wait until the last minute in terms of preparing or studying for an exam. To do all nighters, especially before final exams. Because that way, you can cram all of your studying into a very short period of time. But in the process obviously that compromises sleep and unfortunately it’s counterproductive. College students often wait until the last minute to review information and study for an exam. They may stay up all night ahead of the test.