Reading Metrics
Grade Level
Middle Grades (MG 4-8)
Book Level
4.9
Points
0.5
Fiction/Nonfiction
Nonfiction
Word Count
2366
Points per Word
0.000211
Page Count
32
Points per Page
0.015625
Description
This book shows readers the big changes in design, size, and battery life that took place before mobile phones hit the center of popular culture.