| Classic Children's Songs (16 titles) |
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| Classic Mother Goose Rhymes (12 titles) |
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| College Basketball Teams (12 titles) |
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| College Football Teams (12 titles) |
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| Community Helpers (12 titles) |
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| Comparing Animal Differences (12 titles) |
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| Comparison Fun (8 titles) |
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| Concept Fun (7 titles) |
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| Concept Fun (8 titles) |
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| Constellations (8 titles) |
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| Continents of the World (7 titles) |
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| CraftBooks (8 titles) |
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| Dangerous Jobs in Action (8 titles) |
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| Dangerous Jobs in Action (7 titles) |
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| Dealing with Life Challenges (8 titles) |
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| Dino Discovery (12 titles) |
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| Divisions of Football (8 titles) |
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| Domestic Cats (8 titles) |
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| Domestic Dogs (15 titles) |
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| Earth-Friendly Projects (8 titles) |
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| Endangered Animals (12 titles) |
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| Engineering that Made America (8 titles) |
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| English Grammar (12 titles) |
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| Events That Changed America (8 titles) |
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