Teacher performance is the result of work achieved when planning, implementing, and assessing learning in schools. The results showed: (1) the effect of pedagogic competence on the work motivation of public elementary school teachers in the Medan City is 0.242; (2) the influence of the principal's leadership on the work motivation of State elementary school teachers in the Medan City is 0.238; (3) the influence of pedagogical competence on the performance of public elementary school teachers in the Medan City is 0.259; (4) the influence of principal leadership on the performance of public elementary school teachers in the Medan City is 0.207; and (5) the effect of work motivation on the performance of public elementary school teachers in the Medan City is 0.200. Based on the results of the study, it was found that the pedagogic competence, principal leadership, and work motivation on teacher performance was 28.7% and the rest was determined by other circumstances.

The research aims to analyze the effect of: (1) the ability of the principal to lead on teacher satisfaction at work; (2) organizational culture in schools on teacher satisfaction at work; (3) the effect of the principal's ability to lead on the teacher's motivation to work; (4) the influence of organizational culture in schools on teachers' motivation to work; (5) the influence of the principal's ability to lead on teacher performance; (6) the influence of school culture on teacher performance; (7) the influence of teacher satisfaction at work on teacher performance; and (8) the influence of teacher motivation in working on teacher performance. The research subjects were teachers of State Vocational Schools of Technology and Engineering in Medan City. The sample is 174 people. The research method is path analysis. Based on the hypothesis testing: (1) the ability of the principal to lead on teacher satisfaction at work is 4.8%; (2) school culture on teacher satisfaction at work by 2.3%; (3) the ability of school principals to lead to teacher motivation at work is 7.8%; (4) school culture on teachers' motivation to work by 3.4%; (5) the ability of school principals to lead to teacher performance is 16.2%; (6) school culture on teacher performance by 7.6%; (7) teacher satisfaction at work on teacher performance of 4.6%; and (8) teacher motivation in working on teacher performance by 10.2%. The results showed that the principal's ability to lead, school culture, teacher satisfaction at work, and teacher motivation in working on teacher performance was 59.7%, and the rest was determined by other conditions.