The purpose of this study was to explore how the principal should work at school. Six efforts can be implemented by school principal in enhancing the teacher’s performance including (1) to focus seriously on the improvement of teacher competencies, (2) to provide sufficient funding for improving teacher professionalism, (3) to supervise and guide teachers professionally, (4) to create a organizational culture of school that are comfortable for teachers, (5) to create innovation and advancement at school, and (6) to provide various rewards for each achievement that are done by teacher. Hence, it is recommended that school principal must more actively and creatively collaborate with teachers and educational stakeholder to conduct the improvement of teachers’ performance.

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Penelitian ini bertujuan untuk mendeskripsikan dan mengetahui: (1) Pengaruh Budaya Organisasi Terhadap Kepuasan Kerja; (2) Pengaruh Budaya Organisasi Terhadap Motivasi Berprestasi; (3)Pengaruh Budaya Organisasi Terhadap Komitmen Organisasi; (4) Pengaruh Kepuasan Kerja Terhadap Komitmen Organisasi; dan (5) Pengaruh Motivasi Berprestasi Terhadap Komitmen Organisasi SMP Negeri Kecamatan Simanindo dan Kecamatan Pangururan Kabupaten Samosir. Metode penelitian yang digunakan adalah metode survei yang bersifat exploratori.Jumlah responden sebanyak 158 orang yang diambil dengan sampling random proporsional. Instrumen penelitian berupa angket, sedang analisis data lewat analisis jalur dan sebelumnya ada uji normalitas data dengan liliefors, uji linieritas dan keberartian regresi dengan Analisis Variansi pada taraf signifikansi α sebesar 0,05. Hasil dari penelitian ini ditemukan: (1) terdapat pengaruh langsung positif budaya organisasi terhadap kepuasan kerja dengan koefisien jalur  = 0,210 , dengan pengaruhnya sebesar 4,41%; (2) terdapat pengaruh langsung positif budaya organisasi terhadap motivasi berprestasi dengan koefisien jalur ρ31 = 0,381dengan pengaruhnya sebesar 14,51%; (3) terdapat pengaruh langsung positif budaya organisasi terhadap komitmen organisasi dengan koefisien jalur ρ41 = 0,216 dengan pengaruhnya sebesar 4,66%; (4) terdapat pengaruh langsung positif kepuasan kerja terhadap komitmen organisasi dengan koefisien jalur ρ42 = 0,269 dengan pengaruhnya sebesar 7,23%; (5) terdapat pengaruh langsung positif motivasi berprestasi terhadap komitmen organisasi dengan koefisien jalur ρ43 = 0,187 dengan pengaruhnya sebesar 3,49%. Semakin tinggi pengaruh budaya organisasi, kepuasan kerja, dan motivasi berprestasi guru, maka semakin tinggi pula dalam mempengaruhi komitmen organisasi guru SMP Negeri kecamatan Simanindo dan kecamatan Pangururan kabupaten Samosir.

This study aims to determine the process of management of industrial work practices at Arina Sidikalang Private Vocational School. This type of research is a descriptive study with a qualitative approach. Data collected using questions and observations. The study population was the Vice Principal in the field of Hubinmas, the Supervising Teacher of industrial work practices and XI grade students who carried out Industrial Work Practices in the academic year 2017/2018. The results showed that the management of industrial work practices at the SMK Arina Sidikalang carried out the functions of planning,implementation and evaluation in a simple form called the Character Work Industry Practices Model. 1) Planning of model is focused on the seven characters that were developed and then disseminated to students; religious, discipline, cooperation, hard work, responsibility, honest and polite. 2) The implementation of the Internship in the Arina Sidikalang Private Vocational School is in agreement with the Du / Di instructor to monitor and guide students systematically based on the program and schedule that has been determined, 3) Evaluation of Model is the process of evaluating student activities and practice results, including measuring student achievement in the fields of religious, disciplinary, hard work, cooperation, responsibility, honest, and polite.