Study and teaching 529 English language 272 Case studies 222 Foreign speakers 144 Language and languages 101 Examinations 87 American Studies ; Area Studies ; History 84 Study and teaching (Elementary) 78 Management 72 History 70 Education 66 Study and teaching (Secondary) 62 Study and teaching (Higher) 57 Science 55 Area Studies ; Asian Studies 53 Training of 48 Mathematics 47 Women 45 International Relations ; Political Science ; Security Studies ; Social Sciences 40 Social aspects 38 Certification 37 History and criticism 36 Second language acquisition 36 Aesthetics 33 Electronic data processing personnel 33 Cross-cultural studies 31 Area Studies ; Latin American Studies 30 Classical Studies ; Humanities 30 Research 30 International Relations ; Peace & Conflict Studies ; Political Science ; Security Studies ; Social Sciences 29