The importance of evaluating student interns as part of a regular performance appraisal system for all employees is discussed, along with the role of the internship coordinator or faculty sponsor. The first step is deciding what should be measured: interns' personal characteristics, job performance, and results. The most useful form of performance appraisal for student interns is based on behaviors the student displays when accomplishing a particular task. By establishing a rating format for each task, evaluation can be clear and specific to enable students and supervisors to discuss performance and problem areas. Types of rater errors that may occur include leniency error, central tendency, halo effect, horn effect, latest behavior, and spillover effect. The main uses of evaluation for students are feedback and providing faculty members information on which to assign a grade. It is important that the student see the evaluation and discuss it with the supervisor. The faculty coordinator/sponsor should work with employers to familiarize them with evaluation needs and the format. A draft of an evaluation form that incorporates these evaluation principles is provided, along with four evaluation forms used by three universities and a learning center. (SW)