• 27 Videos, Slides, Films

• 18 Study and teaching
• 13 Experiments
• 12 Physics
• 8 Biology
• 6 Environmental sciences
• 6 Mechanical engineering
• 6 Methodology
• 6 Research
• 6 Technology
• 5 Chemical elements
• 5 Chemistry, Physical and theoretical
• 5 Geology
• 5 Inorganic compounds
• 5 Organic compounds
• 5 Physical geography
• 4 Anthropology
• 4 Crime
• 4 Mathematics
• 4 Mechanics
• 4 Politics and government
• 4 Psychology
• 4 Science
• 4 Social control
• 4 Sociology

• 27 Films Media Group
• 7 BBC Worldwide Ltd
• 4 Looking Glass Pictures
• 4 Uniview Worldwide
• 3 Video Education Australasia
• 2 4 Learning (Firm)
• 2 Cambridge Educational (Firm)
• 2 Nobel Media AB (Firm)
• 1 Dartmouth College
• 1 German United Distributors

• 27 English

• 4 United States
• 1 Russia

• 27 Educational films
• 27 Internet videos
• 27 Videorecording

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