How To Write A Letter Of Evaluation . Focus on behaviors you have observed directly. Generally, parents sign a form that lists what the school will include in its evaluation. FREE 8+ Sample Physician Letter Templates in MS Word from www.sampletemplates.com This employee review letter contains an evaluation of your job performance for the period [insert date] through [insert date]. When writing an evaluation letter for students, the purpose is to describe why or why not a student will be a good fit for a program, whether it is for higher education, graduate school, internships or fellowships. After this, introduce yourself and your credentials.