Human beings
World Book, Inc
Human beings
Age Rating, Reading Level & Content Guide
by World Book, Inc
The text is written at a 4th grade reading level, the subject matter is intended for middle graders (ages 9–12), and the content is gentle with no concerning themes.
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About This Book
Did you know that your body is like a secret universe full of amazing surprises? From how your heart beats to the mysteries hidden in your genes, there’s so much to discover— but that’s only the beginning.
Themes
Quick Assessment
This book offers an engaging introduction to human biology for children aged 9 to 12, covering anatomy, genetics, and common diseases in an accessible way. It combines informative text with illustrations and interactive activities to support learning. Suitable for middle-grade readers, it provides a solid foundation in understanding the human body without intense or graphic content.
Why we rated Human beings 9C
Human beings is written at a Level 4-5 reading level across 160 pages. Strong independent readers around grade 5.5 can typically handle this book on their own; with parent or teacher support, Human beings works for readers up to grade 6.5.
We rate Human beings as 9C ("Clear") because the content sits in the "Gentle" range — no conflict beyond everyday childhood experiences. Across our four dimensions (emotional, physical, social, thematic) the book reads as evenly gentle; no single dimension stands out as a concern.
No specific content flags were raised by community reviewers, which is consistent with the gentle intensity score.
Thematically, Human beings explores human biology, juvenile encyclopedias, human body, and science & nature — these threads give the book room to mean different things to different readers.
Good fit for
- ✓ Children in the Ages 9-12 range — the maturity and attention span match the story's pacing.
- ✓ Patient readers who enjoy slower, character-driven stories.
- ✓ Kids drawn to stories about human biology, juvenile encyclopedias, human body.
- ✓ Curious kids who prefer real-world topics over made-up stories.
Maybe not for
- ! Readers whose emotional readiness lags behind their decoding skills — this book's intensity outruns its reading level, a classic "gifted kid" mismatch.
- ! Reluctant readers who need a fast hook — the pacing here rewards patience.
For Parents
Content Intensity
9C — ClearNo conflict beyond everyday childhood experiences. Safe for sensitive readers.
Was our "Gentle" content intensity rating accurate for this book?
Reading Insights
Hook Factor
1/10A steady, thoughtful read that rewards patient readers.
Discussion Potential
1/10A lighter read — great for independent enjoyment.
Book DNA
Multi-dimensional content fingerprint
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Details
Book Length
- ISBN
- 9780716675204
- Pages
- 160
- Publisher
- World Book, a Scott Fetzer Company
- Published
- 2014
- Type
- Nonfiction