| Simple Machines (6 titles) |
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| Simple Measurement (6 titles) |
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| Simply Math (8 titles) |
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| Social Science (4 titles) |
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| Sounds of Phonics (33 titles) |
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| Space Neighbors (10 titles) |
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| Stars of Today (12 titles) |
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| StateBasics (52 titles) |
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| Step-By-Step Experiments (12 titles) |
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| Stories from the Wild Animal Kingdom (8 titles) |
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| Survival Guides (8 titles) |
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| Take a Closer Look (12 titles) |
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| Talking Hands (12 titles) |
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| The Consonants (23 titles) |
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| The Great Outdoors (8 titles) |
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| The Human Body (6 titles) |
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| The Parables (6 titles) |
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| The Smart Kid's Guide to Everyday Life (8 titles) |
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| The Spark of Invention (8 titles) |
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| The World of Insects (8 titles) |
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| The World of Mammals (6 titles) |
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| The World of Reptiles (4 titles) |
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| The World's Greatest Artists (8 titles) |
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| The World's Greatest Athletes (19 titles) |
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