This is a great article if you don't get enough sleep then have a test the next day. This really helps you to know the amount of sleep you need to be prepared for the next day of testing.
"At high schools across the United States, pressure over grades and competition for college admissions are encouraging students to abuse prescription stimulants, according to interviews with students, parents and doctors. Pills that have been a staple in some college and graduate school circles are going from rare to routine in many academically competitive high schools, where teenagers say they get them from friends, buy them from student dealers or fake symptoms to their parents and doctors to get prescriptions."
If any of all are thinking about this, this is not a god idea. This can cause health problems in the future. I know college is pressure, but if you study and use your time wisely, and put your mind to it, you can accomplish any goal in life.