Aim of this study is to reveal perceptions of the teachers assigned with refresher training courses in secondary education on the functions of these courses which are affiliated to the Ministry of National Education in Turkey. The sampling of the study was constituted by twenty teachers from different branches assigned with the courses. In data collection procedure, the phenomenologic method was used; semi-structured interview form was developed by the researchers to collect data. The findings have indicated that the conventional lecturing and question and answer drills were the most extensively used strategies. As for the functions of the courses, the teachers reported that the courses in concern make significant contributions to them in terms of personal benefits and economic status. They also reported that the courses contributed to the students improving their in-class performance, success on the tests, and problem solving skills. In return, it has also been revealed that the courses cause in fatigue in teachers, and decline in their performance, and triggers disciplinary problems in the classroom. Finally, the teachers stated that the presence of these courses which are affiliated to the ministry tend to decrease the demand for the private courses and study centres