| Reptiles (6 titles) |
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| Reptiles (Spanish) (4 titles) |
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| Robot Innovations (6 titles) |
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| Rocks and Minerals (6 titles) |
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| Rocks and Minerals (5 titles) |
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| Royal Animals (6 titles) |
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| Saddle Up! (6 titles) |
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| Safety for Kids (6 titles) |
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| Savanna Animals (4 titles) |
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| Science Adventurers (6 titles) |
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| Science All Around (8 titles) |
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| Science Concepts (6 titles) |
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| Science Encyclopedias (4 titles) |
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| Science Fact or Science Fiction? (6 titles) |
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| Science in Action (5 titles) |
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| Science of Animal Movement (6 titles) |
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| Science Questions (8 titles) |
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| Science Questions Set 2 (6 titles) |
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| Seasons (4 titles) |
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| Seasons: Fall Fun! (6 titles) |
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