Learn how to write an employee appreciation letter with these templates and examples. Download the template for free (PDF or Word).A letter of gratitude from you affirms the value and significance of their contributions and may be the key to future donations to the campus. Guidelines for writing appreciation letters: State what you appreciate and briefly explain why. Writing a letter is a simple and meaningful way for volunteers nationwide to say "Thank You" to all who serve. This FREE activity helps students practice letter writing while lifting up and appreciating the teachers in their school! Following an interview, promptly (within 2 business days) write the interviewer a letter expressing appreciation and thanks for the interview. This activity encourages students to give thanks to some of their favorite teachers. Virginia Tech® home. Thank you for providing teachers that cared about the students and taught them how to look at something in a different perspective.