| Renewable Energy |
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| Renewable Energy in Infographics |
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| Rescued by a Cat |
New!
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| Rescued by a Dog |
New!
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| Rescued by a Horse |
New!
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| Rescued by an Elephant |
New!
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| Rescued by a Parrot |
New!
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| Rescued by a Whale |
New!
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| Researching with Online Videos |
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| Reshma Saujani |
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1.7 |
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| Respecting Diversity |
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| Respecting Others Online |
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| Responding to Natural Disasters (8 titles) |
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| Restaurant |
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| Returning the Mermaid's Crown |
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| Rippin' and Ridin': Extreme Snowboarding |
Soon!
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| Rise of the Giant Mammals |
Soon!
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| Rittenhouse SoundWorks |
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| River |
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| Road Roller |
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1.6 |
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