High school principals 119 High school teachers 99 Educational leadership 91 High school students 82 School management and organization 76 Attitudes 57 High schools 43 Teachers 38 Teacher-principal relationships 37 Study and teaching (Secondary) 35 Dissertations 33 Dissertations, Academic 30 Job satisfaction 28 Education, Secondary 26 Psychological aspects 22 Education 21 Administration 15 Rating of 15 School principals 14 Academic achievement 13 Job stress 13 Curricula 12 Social aspects 11 Study and teaching 11 Case studies 10 School discipline 10 English language 9 Professional ethics 9 Social conditions 9 Transformational leadership 9