How Pulleys WorkBook - 2007
Forces and motion are key concepts in the elementary science curriculum. How Simple Machines Work uses easy-to-read text and full-color photographs to help young readers understand the principles behind simple machines. Each volume includes three diagrams to enhance understanding. The text has been vetted by a science curriculum consultant and a reading consultant, allowing students to build reading skills as well as their knowledge of science concepts.
Publisher: Milwaukee, WI : Weekly Reader Early Learning Library, 
Copyright Date: ©2007
Characteristics: 24 pages : color illustrations ; 19 cm.