Use one of our resignation letter templates. A formal resignation letter includes: A salutation.Your intention and departure date. The complete guide to writing your resignation letter including expert tips, free copyable samples, and templates. Below are examples of resignation letters for the school administration and principal, coworkers, and parents of students. This sample resignation letter is available for use on UpCounsel. This sample resignation letter is available for use on UpCounsel. Your resignation letter does not have to say why you're leaving the job. I have made some great connections over the four years I have spent in the school and I hope to nurture all these relationships in the years to come. My experience with several schools in the district was overwhelmingly positive.