| Trucks at Work (6 titles) |
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| Twilight Animals (6 titles) |
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| Understanding You (6 titles) |
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| United States President Biographies (8 titles⁎) |
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| Unusual Animals (6 titles) |
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| U.S. Armed Forces (6 titles) |
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| US Symbols (6 titles) |
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| Veo, veo un animal (I'm Thinking of an Animal) (6 titles) |
New! Fall 2025 |
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| Ver para creer (Seeing is Believing) (3 titles) |
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| Volcano Science (6 titles) |
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| Vowel Teams (6 titles) |
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| Weather (6 titles) |
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| What's the Difference? (6 titles) |
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| Word Families (6 titles) |
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| Working Animals (6 titles) |
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| World Festivals (6 titles) |
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| World of Emily Windsnap (4 titles) |
New! Spring 2026 |
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| World of Mythical Beings Set 1 (6 titles) |
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| World of Mythical Beings Set 2 (6 titles) |
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| World of Reading Level 1 Set 7 (10 titles) |
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