Reading Metrics
Grade Level
Middle Grades (MG 4-8)
Book Level
6.4
Points
0.5
Fiction/Nonfiction
Nonfiction
Word Count
2235
Points per Word
0.000224
Page Count
32
Points per Page
0.015625
Description
In this book, readers will discover what it was like for the inventors of the helicopter while also learning how this huge machine became the military necessity it is today.