Abstract: “The School is an institution that organizes education from Primary grades, Junior high and Senior high. In education, the school needs a teacher who became the most important component of which is the professional transfer of knowledge in order to take over the learning process to be able to produce the maximum Resources Human or graduates who have a high intellect in order to continue their education to a higher level. The performance is a concept tha is universal and operational effectiveness is an organization, a part of the organization and its employees based on the standards and criteria that have been set before. Teacher performance is a measure of the extent to which a teacher work optimally in accordance with its own capabilities in an effort to achieve the objectives of institutional. This study aims to measure the performance of the teacher in a junior high school in the implementation of the process of learning based on indicators of competence of teachers in the learning p”

Keywords: Teacher, Teacher Performance, Mamdani Fuzz