High school principals 89 Educational leadership 82 High school teachers 65 High school students 60 School management and organization 55 Attitudes 41 Teacher-principal relationships 35 High schools 27 Job satisfaction 21 Psychological aspects 21 Study and teaching (Secondary) 20 Education 17 Teachers 17 Education, Secondary 11 School principals 10 Curricula 9 Social aspects 9 Transformational leadership 9 Job stress 8 Management 8 Multiple intelligences 8 School supervision 8 English language 7 Professional ethics 7 Rating of 7 School discipline 7 Case studies 6 Curriculum planning 6 Finance 6 Psychology 6