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Classifying Living Things Books in Order

Classifying Living Things is a 3-book series by Francine Galko for ages 9–12, at a grades 5–6 reading level, with gentle content (HootRated intensity 1/5).

Books
3
By publication date
Reading level
Grades 5–6
Average grade level 5.8
Recommended ages
Ages 9–12
From HootRated age ratings
Content intensity
Gentle
HootRated 1/5

Classifying Living Things Reading Order

Series numbers aren't available for most Classifying Living Things books, so they're listed by publication date (oldest first).

# Title Reading Level Ages Content
1 Classifying Flowering Plants (Classifying Living Things)
2003
Level 5-6 9-12 Gentle
2 Classifying Invertebrates (Classifying Living Things)
2003
Level 5-6 9-12 Gentle
3 Classifying Nonflowering Plants (Classifying Living Things)
2003
Level 6 9-12 Gentle

Content Intensity Across the Series

Consistent

Content stays at a steady intensity level throughout the series.

1
2
3
First book Latest book

Series books grow with readers — but that's also the trap. Most series start at one reading level and one content intensity and drift upward over the course of the run. Classifying Living Things (3 books by Francine Galko) lands at a grades 5–6 reading level, with average content intensity 1/5. Intensity stays consistent across the series, so a reader who can handle the first book can generally handle the rest.

The reading-order table above lists every book with per-volume reading level, age and intensity ratings so you can spot any escalation before it catches your reader off guard. For a deeper dive into how we score text difficulty vs. emotional weight separately — and why series readers especially benefit from that split — see our methodology page.

All Classifying Living Things Books

Classifying Flowering Plants (Classifying Living Things)

Francine Galko

Cover of Classifying Flowering Plants (Classifying Living Things)

Classifying Flowering Plants (Classifying Living Things)

Francine Galko

Level 5-6

Classifying Invertebrates (Classifying Living Things)

Francine Galko

Cover of Classifying Invertebrates (Classifying Living Things)

Classifying Invertebrates (Classifying Living Things)

Francine Galko

Level 5-6

Classifying Nonflowering Plants (Classifying Living Things)

Francine Galko

Cover of Classifying Nonflowering Plants (Classifying Living Things)

Classifying Nonflowering Plants (Classifying Living Things)

Francine Galko

Level 6

Similar reading level, content intensity and themes.

Questions about the Classifying Living Things series

What reading level is the Classifying Living Things series?
Classifying Living Things books are at a grades 5–6 reading level (average grade level 5.8), and HootRated recommends the series for ages 9–12. There are 3 books in the series.
What order should I read the Classifying Living Things books?
Series numbers aren't available for most Classifying Living Things books, so HootRated lists them by publication date: Classifying Flowering Plants (Classifying Living Things) (2003); Classifying Invertebrates (Classifying Living Things) (2003); Classifying Nonflowering Plants (Classifying Living Things) (2003).
What age is the Classifying Living Things series appropriate for?
HootRated recommends Classifying Living Things for ages 9–12. Content is gentle (HootRated intensity 1/5). Intensity stays consistent across the series, so a reader who can handle the first book can generally handle the rest.