PowerKids Press; Library of Why Books in Order

3 books by Marian B. Jacobs. Reading level: Grades 4.4–4.8. Lower Grades (Ages 5–8).

3
Books
Grades 4.4–4.8
Reading Level
1/5
Avg. Intensity
LG
Lower Grades

Content Intensity Across the Series

Consistent

Content stays at a steady intensity level throughout the series.

1
2
3
First book Latest book

PowerKids Press; Library of Why Reading Order

# Title Reading Level Content
1 Why did the dinosaurs become extinct?
Marian B. Jacobs
Level 4-5 Gentle
2 Why do the ocean have tides?
Marian B. Jacobs
Level 4-5 Gentle
3 Why is the sky blue?
Marian B. Jacobs
Level 4-5 Gentle