History 891 Study and teaching 590 Politics and government 322 Study and teaching (Higher) 279 Management 274 Sociology 262 Treatment 259 sociology 257 Rhetoric 231 Vocational guidance 199 Business enterprises 189 Youth development 178 Services for 164 English language 163 Marketing 156 Prevention 154 Surgery 154 Training of 154 Nutrition 153 Youth 146 Research 143 Dentistry 130 Brain 124 Diseases 123 management 119 Psychological aspects 116 Periodontics 114 Methodology 108 Career development 107 Dentistry, Operative 106 Exercise 106 Academic writing 105 Dental implants 105 Composition (Language arts) 101 Creative writing 99 Personnel management 99 Social aspects 98 Microeconomics 97 Law and legislation 96 Macroeconomics 96 Nursing 94 Physical fitness 94 Economic conditions 92 Social conditions 91 Economic history 86 Education 86 Mathematics 85 Physical education and training 85 Physics 81 Children 80 Physiological aspects 80 Dental technology 77 Health aspects 77 Employees 74 Psychotherapy 74 Diagnosis 73 Language arts 73 Health and hygiene 72 Language arts (Secondary) 71 Adolescence 70 Correlation with content subjects 70 Psychology 70 Teenagers 70 Mouth 69 dentistry 68 businesses (business enterprises) 67 firms 67 physics 66 Biology 65 Patients 64 Arduino (Programmable controller) 63 Medical care 61 Slavery 61 Technological innovations 61 Computer programming 58 Programming 58 Business communication 57 Science 57 computer programming 57 Development 56 Interpersonal communication 55 Aesthetic aspects 54 Data processing 54 Economics 54 Entrepreneurship 54 Indians of North America 54 World War, 1939-1945 54 Child development 53 Rehabilitation 53 Web-based instruction 53 Creation (Literary, artistic, etc.) 52 Early childhood education 52 entrepreneurs 52 rhetoric (discipline) 52 Food 51 Occupations 50 Social life and customs 50 Teaching 50 Wounds and injuries 49 early childhood education 48