How do you write areadmision letter to a college?

i am trying to find out how to write a readmission letter to a high school i am trying to find out how to write a readmission letter to a high school i am trying to find out how to write a...

See the links below.

DEAR SIR, I will request you to ........If reply is positive then ? "Thank you, sir."if reply is negative then ? "How dare you?"

Dear Oprah I'm writing you due to a bad back and out of work - for yard worker; my husband has been out of work for years due to a bad back - we have no insurance and all I want to do is smile and...

This is best done by the HR services of the college or someone affiliated with the school as this question will probably be asked as schools are not going to want to be affiliated with some...