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NATIONAL STANDARDS: Grades K-4 National Science Standards- Science and Technology: V- People have always invented tools and techniques to solve problems- Tools help scientists make better observationsGrades K-4 National Social Studies Standards- Science, Technology, and Society: VIII- Identify and describe ways in which science and technology have changed society

You Can Use a Balance 2004, Children's Press(CT), New York, NY

ISBN-13: 9780516278995

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You Can Use a Balance 2003, Children's Press(CT), New York, NY

ISBN-13: 9780516228693

Hardcover

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