This research was motivated by the low level of professional competence of teachers to ward students' motivation in the learning process at SMA N 1 North Siberut Mentawai Islands. The purpose of this study was to determine and describe the relationship of professional competence of teachers to students' motivation in SMA N 1 North Siberut Mentawai Islands. The hypothesis of this study is that there is a strong positive relationship between the significant and the professional competence of teachers on students' motivation in SMA N 1 North Siberut Mentawai Islands. This research is Descriptive Correlational the entire population of students of SMA N 1 North Siberut Mentawai Islands as much as 423 students. Sampling was done by way of random sampling technique in which the individual is drawn at random from class X to class XII. Samples were taken by 80 students using Slovin formula. The independent variable in this paper is the   professional competence of teachers (X) and the dependent variable is the student's motivation (Y). Data professional competence of teachers and students' motivation derived from the questionnaire/questionnaire. Processing of the data in this research using SPSS 17.0 for Windows. To test the quality of a measuring tool used Corrected Item-Total Correlation to test its validity and to test the reliability of the Alpha Cronbarch item questionnaire with an average score of 2.86 for a total percentage score of 71.47%  for Professional Competence of Teachers and the average score of 2, 83 with a total percentage score of 70.08% for student motivation. The results showed a positive relationship strong and significant correlation between the variables X with Y of 69.8% and 30.2% influenced by other variables not studied in this research.

This research was motivated by the low level of professional competence of teachers to ward students' motivation in the learning process at SMA N 1 North Siberut Mentawai Islands. The purpose of this study was to determine and describe the relationship of professional competence of teachers to students' motivation in SMA N 1 North Siberut Mentawai Islands. The hypothesis of this study is that there is a strong positive relationship between the significant and the professional competence of teachers on students' motivation in SMA N 1 North Siberut Mentawai Islands. This research is Descriptive Correlational the entire population of students of SMA N 1 North Siberut Mentawai Islands as much as 423 students. Sampling was done by way of random sampling technique in which the individual is drawn at random from class X to class XII. Samples were taken by 80 students using Slovin formula. The independent variable in this paper is the professional competence of teachers (X) and the dependent variable is the student's motivation (Y). Data professional competence of teachers and students' motivation derived from the questionnaire/questionnaire. Processing of the data in this research using SPSS 17.0 for Windows. To test the quality of a measuring tool used Corrected Item-Total Correlation to test its validity and to test the reliability of the Alpha Cronbarch item questionnaire with an average score of 2.86 for a total percentage score of 71.47% for Professional Competence of Teachers and the average score of 2, 83 with a total percentage score of 70.08% for student motivation. The results showed a positive relationship strong and significant correlation between the variables X with Y of 69.8% and 30.2% influenced by other variables not studied in this research.