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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 (15)

Series

Series
  • Math with Confidence (15)
  • Facts That Stick (8)

Grade

Grade
  • Middle School (3)
    • Fifth Grade (3)
  • Elementary School (12)
    • Kindergarten (2)
    • Second Grade (2)
    • Fourth Grade (3)
    • Third Grade (3)
    • First Grade (4)

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Format
  • Paperback (12)
  • PDF (12)

Condition

Condition
  • New (8)
  • Scratch & Dent (7)