Question

write a latter to headmaster requesting him to arrange a special class after end test exam

Answer 1

The headmaster
School name
school address
date
subject - Arrange a special class
Dear Sir,
With due I request you to arrange a special class for us after the annual exam for clearing our doubts as because of doubts we are unable to prepare for the exam.
Therefore, I request you to kindly arrange some special classes for us at your earliest convenience.
Yours obediently
your name
your class