Reading Metrics
Grade Level
Middle Grades (MG 4-8)
Book Level
6.6
Points
1.0
Fiction/Nonfiction
Nonfiction
Word Count
5525
Points per Word
0.000181
Page Count
48
Points per Page
0.020833
Series
I Know America
Description
This book explores the history of the United States Postal Service, discussing the processing of mail, postal employees, stamps, and letter writing.