• 1,211 Videos, Slides, Films

• 209 Sociology
• 192 History
• 105 Language arts
• 100 World history
• 96 Social institutions
• 93 Environmental sciences
• 79 Art and architecture
• 77 Biology
• 68 Interpersonal relations
• 65 Families
• 65 Life sciences
• 59 Literature
• 57 Physical sciences
• 54 Politics and government
• 50 American literature
• 48 Appreciation
• 47 Health
• 43 British literature
• 43 Irish literature
• 43 World politics
• 42 Astronomy
• 40 Biodiversity
• 40 Biography
• 40 Equality
• 40 Zoology

• 1,211 Infobase

• 1,194 English
• 16 Unknown
• 1 Chinese

• 110 United States
• 48 U.S. states
• 47 Asia
• 28 Europe
• 17 Middle East
• 13 Southeast Asia
• 12 America
• 11 Africa
• 11 China
• 7 Latin America
• 4 Russia (Federation)
• 3 Africa, Sub-Saharan
• 3 East Asia
• 2 Africa, North
• 2 Asia, Central
• 2 North America
• 1 Central America
• 1 Japan
• 1 Korea
• 1 South America
• 1 South Asia

Limit year range