Write an application to your headmaster for early leave from school after 4th period.
22 April 2013
Motizheel Model High School,
Subject: Prayer for leave in advance after 4th period.
I beg to state that I am a student of class vi in your school. My roll no is 11 and section is B. It is a matter of sorrow that I beg to state that I have a terrible headache for which I cannot stay in class any more. Now I am feeling uneasy and unable to continue the rest of the classes. So, I need to go home. Immediately I need to go home and take medicine.
May I therefore, pray and hope that you would be kind enough to grant me leave to go home early from school after the 4th period.
I remain sir
Your most obedient pupil
Class:vi, Roll: 11