Download or read book Theme Sets: Teachers Guide Using Simple Machines written by National Geographic Learning National Geographic Learning and published by . This book was released on 2006-01-01 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Using Simple Machines explains the simple machines that people use every day at home, in sports, in construction, and in health. While each of the four books focuses on a different area where simple machines are used, the same key concepts are developed a