What do you write in a Teacher's Resignation Letter? The right thing to do would be to give them a 2 week notice.The way NC is it should come as no real surprise for someone top leave in the middle of the year. In the body of the letter, immediately state your intention to resign and provide your reasoning, including only positive feelings towards your work experience. I extend my best wishes to you and the school. Should you require any assistance during the remaining period, please do not hesitate to reach out to me. (b) Thirty Days' Notice Resignation Requirement. Use a formal business format for the actual letter itself. Notify your manager in person before you submit your formal resignation letter. Introduction: Briefly state your intent to resign and your position.