[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]:
As we near the end of the school year, I wanted to take a moment to express my heartfelt appreciation for all you have done as my children's Sunday School teacher this year. They have so looked forward to attending Sunday School each week and to learning from all of your lessons and stories. I also appreciate how you have loved and cared for them. We have truly enjoyed getting to know you.
Thank you again, and may you be blessed abundantly in return for the many ways you have blessed others like us.
[Sender's first and last names]