The purpose of this study research is to know effect of leadership and trust in teacher performance in Public High Schools in DKI Jakarta. This research was conducted using survey methods with quantitative approaches and path analysis techniques (path analysis). The population of this study was 111 teachers. Research sample selected as many as 91 teachers using the simple random sampling technique. The data were obtained through questionnaires and analyzed using path techniques. Based on the results of data analysis in the research wet can be concluded: first, teacher leadership has a direct effect on significant performance. Second, trust has a direct effect on significant performance. Third, teacher leadership has a direct effect on significant trust. Fourth, teacher leadership has a direct effect on performance through teachers leadership and trust.
This research aims to developing snake ladder learning media in circulatory system material and knowing the effectiveness of snake ladder learning media on learning outcomes of science. This study uses Research and Development according to Borg and Gall and experimental tests with the design of pretest posttest control group design. Data obtained in the form of quantitative data and qualitative data. The results of validation by material experts were 85% (very feasible), by media experts at 81% (very feasible), and by linguists expert 77% (feasible), with an average overall score of 81% (very feasible). The results show that the snake ladder learning media on the circulatory system material is very feasible to be used in learning, as well as the snake ladder learning media on the circulatory system material effectively improves student learning outcomes.
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