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Shop 15 Years Old

Advanced world history studies, in-depth grammar, and compelling audiobooks offer interest and challenge for teens. 

Our age categories correspond to grade levels, and are just meant as a rough guide. Always focus on your own child’s interests and abilities, rather than standard age/grade levels.

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Age 15_9th Grade
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Subject
  • Math (9)

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Series
  • Math with Confidence (9)
  • Facts That Stick (8)

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  • Elementary School (9)
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    • First Grade (4)

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  • Paperback (8)
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Condition
  • New (8)
  • Scratch & Dent (5)