History 314 German language 105 Readers 98 Readers (Primary) 75 Histoire 66 African Americans 63 Ukrainian language 51 more ... Politics and government 45 Primers, German 42 Czech language 38 Indians of North America 38 Social conditions 38 Social life and customs 34 Latvian language 27 Greek language 25 Polish language 25 Greek language, Modern 24 Readers and speakers 24 Grammar 23 Norwegian language 23 Slovak language 23 Textbooks 23 Race relations 22 Description and travel 21 History and criticism 21 Jews 20 Women 20 Emigration and immigration 19 French language 19 Education 18 Presidents 18 Slavery 18 Swedish language 18 English language 17 Biography 16 Genealogy 16 Noirs américains 16 Reader 16 American literature 15 Civilization 15 less ...