[Your letterhead, if desired; if not, your return address]
[Date of letter-month, day, and year]
[Recipient's first and last names]
[Street or P.O. box address]
[City, State ZIP code]
Dear [recipient's name]:
I want to express my sincere appreciation to you for being the most superb school principal I have ever known. Your leadership during the time that my three children have attended your school has been remarkable and inspiring. I know many other parents and students feel the same way, even though we might often forget to tell you how much we appreciate you.
Thank you again for your wise and strong leadership. Our school is definitely a better place because you are there.
[Sender's first and last names]