| How Roberta Vinci Stunned Serena |
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| How the Heck Does That Work?! (8 titles) |
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| How the World Celebrates (6 titles) |
New
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| How the World Worships (7 titles) |
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| How to Handle Cyberbullies |
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5.2 |
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| Human Geography |
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| Human Service |
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6.0 |
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| Hunted by Predators Hacks |
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| Hurricane Katrina and America's Response |
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| Hurricanes |
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| Hydra |
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| Hydroelectric Energy |
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6.4 |
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| Hydrologist |
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6.4 |
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| Ice Hockey |
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6.1 |
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| Identifying the Source |
New
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| Image Sharing |
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| Immigration |
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7.0 |
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| Immortals vs. Navy SEALs |
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| Imposters Among Us |
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| Improv Show |
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