Almost all the subjects are designed in such a way so that every student can acquire a minimum qualification after a definite academic year.There must be numbering system or grade point to calculate a student performance.This is a must for a student future education also.
Everywhere in the world there are some public examinations after a required time of span.The student who are able to cross their internal examinations,they will attend this public examinations.In some countries, there are Primary school certificate examination,High school certificate examination, Graduation examination etc.
These examinations are run by the country or educational authority to evaluate students merit.