When an athlete runs in the 1000 meter race, he does not need to know how his body is burning the calories but he should know how fast he should go in order to maintain his stamina and still complete the race. It shows that sometimes it is important to have the knowledge of applying the concept rather than knowing how the concept actually works. The same technique needs to be applied by students while doing their revision for exams. Use Mr. Koh’s parachute concept which says that it is importa...