From ancient times to today humans have searched for methods to make their work easier. Learn about the developments and historical context of different tools and machinery that have helped make people more productive and enabled them to enjoy more leisure time....
Age Range: 7 - 9 years
Grade Level: 4 - 5
Lexile Measure: 940L
Series: Timeline History
Paperback: 32 pages
Publisher: Heinemann (September 1, 2010)
Language: English
ISBN-10: 1432938142
ISBN-13: 978-1432938147
Product Dimensions: 7.2 x 0.2 x 9.2 inches
Amazon Rank: 5386041
Format: PDF ePub TXT book
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