Interest Level
Grades 3 - 5
Reading Level
Grade level Equivalent: 4.3
Lexile Measure®: 910L
DRA: 40
Guided Reading: R
Genre
- General Nonfiction
Theme/Subject
- Boats and Underwater Craft
- Time and Measurement
- Geography and Map Skills
About This Book
In the 1600s, sailors had to guess just how far they had traveled, or they had to rely on the stars to navigate. John Harrison, however, changed navigation forever. Interested in science from an early age, Harrison went on to invent a clock that not only kept time, but helped sailors know just how far they had traveled.Items Added to Cart:
1 Paperback
2 Hardcover
1 Teacher's Edition
$48.99 Subtotal



