| Disruptors in Tech (8 titles) |
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| D.I.Y. Make It Happen (20 titles) |
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| Documentary Film |
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| Dog-Walking Business |
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| Double Trouble: A Principal Possessed |
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| Dragons |
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| Dragons vs. Griffins |
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| Drone Pilot |
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7.4 |
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| Drones |
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6.1 |
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| Droughts |
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| Drugs |
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5.1 |
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| Duct Tape |
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| DVDs |
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6.2 |
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| Dwarfs |
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| Earthquakes |
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| Earth's Biomes |
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4.7 |
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| Earth vs. Mars |
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| E-Commerce |
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| Econo-Graphics (8 titles) |
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| Ecosystems |
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