History 894 Study and teaching 592 Politics and government 323 Study and teaching (Higher) 279 Management 274 Sociology 264 Treatment 259 sociology 257 Rhetoric 232 Vocational guidance 199 Business enterprises 189 Education, Primary 187 Youth development 178 Services for 164 English language 163 Marketing 156 Prevention 156 Surgery 155 Nutrition 154 Training of 154 Youth 146 Research 144 Dentistry 131 Brain 124 Diseases 123 management 119 Periodontics 115 Psychological aspects 115 Methodology 110 Career development 107 Dentistry, Operative 107 Dental implants 106 Exercise 106 Academic writing 105 Composition (Language arts) 102 Creative writing 100 Personnel management 98 Social aspects 98 Law and legislation 97 Microeconomics 97 Macroeconomics 96 Nursing 95 Physical fitness 94 Social conditions 93 Economic conditions 92 Psychology 89 Economic history 86 Education 86 Mathematics 85 Physical education and training 85 Physics 81 Children 80 Physiological aspects 80 Psychotherapy 79 Dental technology 78 Health aspects 77 Employees 73 Health and hygiene 73 Language arts 73 Diagnosis 72 Technology 72 Language arts (Secondary) 71 Adolescence 70 Correlation with content subjects 70 Mouth 70 Teenagers 70 dentistry 69 Biology 67 businesses (business enterprises) 67 firms 67 physics 66 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 Health 55 Interpersonal communication 55 Aesthetic aspects 54 Data processing 54 Economics 54 Entrepreneurship 54 Indians of North America 54 Rehabilitation 54 World War, 1939-1945 54 Child development 53 Web-based instruction 53 Creation (Literary, artistic, etc.) 52 Early childhood education 52 Race relations 52 entrepreneurs 52 rhetoric (discipline) 52 Food 51 Occupations 50