History 99
Social conditions 47
Politics and government 36
Social life and customs 32
History and criticism 31
Social aspects 27
Economic conditions 25
Teachers' workshops 22
Teachers 20
Literature 19
Women 19
African Americans 18
Professional education 18
Training of 18
Celebrities 17
Genealogy 17
Children 16
Earth sciences 16
Geology 16
Physical geology 16
Civil rights 15
Man-woman relationships 15
Psychological aspects 15
Education 14
Music 14
World War, 1939-1945 14
Geomorphology 13
Group reading 13
Democracy 12
Geology, Structural 12
Jews 12
Political aspects 12
Emigration and immigration 11
Family relationships 11
Holocaust, Jewish (1939-1945) 11
Language arts (Secondary) 11
Political science 11
Race relations 11
Study and teaching 11
Study and teaching (Elementary) 11
Criticism and interpretation 10
Moral and ethical aspects 10
Research 10
Environmental aspects 9
Law and legislation 9
Marriage 9
Patients 9
Rehabilitation 9
Religious aspects 9
Economic aspects 8
Families 8
Government policy 8
Murder 8
World music 8
Artists 7
Attitudes 7
Cultural assimilation 7
Indians of North America 7
Islam 7
Language arts (Elementary) 7
Medical care 7
Plate tectonics 7
Racism 7
Reading (Secondary) 7
Youth 7
AIDS (Disease) 6
American poetry 6
Books and reading 6
Brain 6
Climatic changes 6
Corrupt practices 6
Description and travel 6
Documentary films 6
Environmental protection 6
Family members 6
Girls 6
Presidents 6
Prevention 6
Study and teaching (Secondary) 6
Anthropology 5
Art 5
Capital punishment 5
Courtship 5
Crimes against 5
Ethnic relations 5
Fathers 5
Global warming 5
History, Military 5
Holocaust survivors 5
Legal status, laws, etc 5
Mental illness 5
Mothers and daughters 5
Music appreciation 5
Older people 5
Philosophy 5
Poetry 5
Prisoners 5
Psychology 5
Science 5
Sex role 5