The advice you are going to read was written by Dr.Malleson,Director of the University of London Research Unit for Student Problems. It is intended for the guidance of university students who are expected to spend a great deal of time studying on their own.Students who are still at school spend much more time in class than university students and have less time for private study.Nevertheless the principle remains the same.

     There is a lot of misunderstanding about studying.Most students have not been taught the principled behind really effective working.Here is a graph showing the amount a person learns against the number of hours he works in a day.If he doesn't do any work ,he learns nothing.If he does an hour's work,he learns a certain amount.If he does two hours' work he learns about twice as much.If he does more work he'll learn still more.Now,if he tries to do 23 hours' work in 24, he'll be so exhausted that he'll hardly remember anything:what he learns will be very little.If he did less work he'd learn more.

     Fatigue is an absolutely real thing;one can't escape it or try to ignore it.