High school principals 96 Educational leadership 83 High school teachers 69 High school students 65 School management and organization 58 Attitudes 47 Teacher-principal relationships 36 High schools 30 Job satisfaction 23 Study and teaching (Secondary) 23 Psychological aspects 21 Teachers 19 Education 17 Education, Secondary 13 Rating of 12 Curricula 11 School principals 10 School discipline 9 Social aspects 9 Transformational leadership 9 Job stress 8 Management 8 Multiple intelligences 8 Professional ethics 8 School supervision 8 Case studies 7 Curriculum planning 7 English language 7 Finance 6 Psychology 6