• 20 Videos, Slides, Films

• 11 Methodology
• 9 Physical geography
• 8 Environmental sciences
• 8 Sociology
• 7 Biology
• 7 Physics
• 7 Psychology
• 6 Chemistry
• 6 Geology
• 5 Anthropology
• 5 Experiments
• 5 History
• 5 Medicine
• 4 Crime
• 4 Mathematics
• 4 Politics and government
• 4 Science
• 4 Social control
• 4 Vocational guidance
• 3 Geography
• 3 Nationalism
• 3 Slopes (Physical geography)
• 2 Affective disorders

• 18 Films Media Group
• 17 Films for the Humanities & Sciences (Firm)
• 5 BBC Worldwide Ltd
• 4 Uniview Worldwide
• 2 Cambridge Educational (Firm)
• 2 Silverman, David, 1943-
• 1 Canadian Broadcasting Corp. (Firm)
• 1 German United Distributors
• 1 Infobase
• 1 La Compagnie des Taxi-Brousse
• 1 Nobel Media AB (Firm)
• 1 Online Classroom Ltd
• 1 Palfreman Film Group
• 1 TV 2 (Denmark)

• 20 English

• 4 United States
• 3 Europe
• 1 India
• 1 Middle East

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