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Concept of how the eye functions
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in: Lesson C-15. Light I: Basics of Light and Seeing
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- 5 years, 10 months ago
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Materials–flashlight bulbs of the old filament type
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- 5 years, 10 months ago
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Electrical circuits
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- 5 years, 10 months ago
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Short circuits–What they are
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- 5 years, 10 months ago
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Ground wires–their importance
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- 5 years, 10 months ago
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Importance of Fuses
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- 5 years, 10 months ago
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The Human Voice
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- 5 years, 10 months ago
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Books to Supplement Photosynthesis
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in: Lesson B-3. The Plan and Animal Kingdoms: Distinguishing Between Plants and Animals
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- 5 years, 11 months ago
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Books on Identifying Living Things
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- 5 years, 11 months ago
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Books on Classification
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- 5 years, 11 months ago
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Flying machines. New inventions
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- 5 years, 11 months ago
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Rising 7th Grader—which volume to use?
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in: Open Discussion
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- 5 years, 11 months ago
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Illusion of Explanatory Depth in Science
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- 5 years, 11 months ago
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Blace hole video
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- 5 years, 11 months ago
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Concept of how the eye functions