Reading Metrics
Grade Level
Middle Grades (MG 4-8)
Book Level
7.6
Points
2.0
Fiction/Nonfiction
Nonfiction
Word Count
8667
Points per Word
0.000231
Page Count
85
Points per Page
0.023529
Description
This book explains how calendars were invented, how people kept track of time before clocks were used, what time is, and more.