| How Did They Build That? School |
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3.0 |
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| How Did They Build That? Skyscraper |
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3.2 |
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| How Did They Build That? Stadium |
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3.2 |
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| How Did They Build That? Tunnel |
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3.2 |
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| How Did They Build That? Water Park |
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| How Did They Build That? Zoo |
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| How Does It Fly? (8 titles) |
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| How Does It Fly? Blimp |
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3.1 |
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| How Does It Fly? Bomber Plane |
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3.5 |
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| How Does It Fly? Fighter Plane |
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3.5 |
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| How Does It Fly? Glider |
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3.2 |
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| How Does It Fly? Helicopter |
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3.6 |
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| How Does It Fly? Hot Air Balloon |
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3.1 |
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| How Does It Fly? Jet Plane |
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3.1 |
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| How Does It Fly? Propeller Plane |
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3.4 |
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| How Do the Three Branches of Government Work Together? |
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| How Do They Help? (26 titles) |
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| How Do We Live Together? (8 titles) |
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| How Do We Live Together? Coyotes |
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| How Do We Live Together? Deer |
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