| Presidents of the United States (45 titles) |
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| Punctuation (6 titles) |
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| Rain Forest Animals (6 titles) |
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| Rain Forest Life (6 titles) |
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| Read & Enjoy Preview Bundle (41 titles) |
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| Reading Hub Digital Preview (41 titles) |
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| Reading Spree Preview Bundle (40 titles) |
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| Reels & Wheels Preview Bundle (46 titles) |
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| Reptiles (6 titles) |
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| Reptiles (Spanish) (4 titles) |
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| Riveting Reads Preview Bundle (37 titles) |
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| Rm. 201 (4 titles) |
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| Robyn Hood (4 titles) |
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| Rocks and Minerals (6 titles) |
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| Rotten School (5 titles) |
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| Royal Animals (6 titles) |
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| Safety for Kids (6 titles) |
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| Savanna Animals (6 titles) |
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| Science All Around (8 titles) |
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| Science Concepts (6 titles) |
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