Reading Metrics
Grade Level
Lower Grades (LG K-3)
Book Level
4.2
Points
0.5
Fiction/Nonfiction
Nonfiction
Word Count
1165
Points per Word
0.000429
Description
RobbO and RobbEE learn that a ramp, called an inclined plane, is used for building stairs and escalators and was even used in ancient Egypt to build the pyramids. The co-author is Gerry Bailey.