STRENGTHENING LEARNING EFFECTIVENESS THROUGH SELF EFFICATION AND SUPERVISION OF SCHOOL HEADSThis study aimed to find the efforts to increase the effectiveness of learning through a study of its relationship with self-efficacy and principal supervision. The population of this study was 163 civil servant teachers, with a total sample of 116 teachers. It was determined by using the Slovin formula with an error tolerance of 5%. The data was collected by using an instrument in the form of a questionnaire and analyzed with descriptive and inferential statistical analysis. The results showed that there were three positive and significant relationships. Firstly, there was a positive and significant relationship between self-efficacy and the learning effectiveness of PNS teachers with a correlation coefficient value of 0.536. Secondly, there was a positive and significant relationship between principal supervision and learning effectiveness with a correlation coefficient value of 0.519. Thirdly, there was a positive and significant relationship between self-efficacy and principal supervision together with learning effectiveness with a correlation coefficient value of 0.616.
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