View Spread Levers at Work What is a lever? How does it give us the upper hand? When were levers first used? Find out the answers to these questions and more! RL Grades 2 IL Grades K-4 GRL N Details: Product: Library Bound Book eBook ISBN: 978-0-7660-6732-5 Author: Dawn LaMachia Copyright: 2016 Reading Level: Grade 2 Interest Level: Grades K-4 GRL: N Dewey: 621.8'22--dc23 Pages: 24 Dimensions: 8 1/2" x 7 1/8" Books and web sites for further information, Index, Words to Know, Sidebars, Step-by-Step Experiments Library Bound Book — $25.60 / $19.20 eBook — $25.60 / $19.20