If we observe further reality on teachers' competence, it seems that they still varied between one and another. One of the educational crisis characteristics in Indonesia is that the teachers have not been able to show their adequate work performances. In addition, work performances of teachers have not been fully supported by adequate degree of competences. Hence, there must be a comprehensive effort to improve the teachers' competence. One of the efforts that can be carried out is the optimization of school headmasters' role. This study will explain how the contribution of managerial competence and supervision competence of the school headmasters affect the teachers' work performance of SMPN (National Junior High School) Kota Bandar Lampung. The object of the study is the entire population of headmasters of SMPN Kota Bandar Lampung consisting of 31 people. The results of the study show that; 1) there is a positive and significant contribution of the headmasters' managerial competence to the teachers' work performance of 23.2%, with medium relationship strength being 0.481; 2) the headmasters' supervision competence gives a contribution toward the work performance of the teachers of SMPN Kota Bandar Lampung of 79.9%, with strength relationship being 0.894; 3) headmasters' managerial competence and supervision competence gives a contribution to the teachers' work performance of SMPN Kota Bandar Lampung of 80.3%, with the strength relationship being 0.896.

Farid Wajdi Ibrahim (2018). Managerial and Supervision Competence at Junior High School Level, European Research Studies Journal Volume XXI Issue 3, 327-336