Don Powers

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Electricity and Magnetism: Static Electricity, Current Electricity, and Magnets: Middle/Upper Grades (Expanding Science Skills Series)
Beaver, John B., Ph.D.; Powers, Don

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� 3.33

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Astronomy, Grades 6 - 12: Our Solar System and Beyond (Expanding Science Skills)
Powers, Don; Beaver, John B

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� 4.84

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The Solar System, Grades 5 - 8: Connecting Students to Science
Powers, Don; Beaver, Dr John B

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� 7.79

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Electricity & Magnetism (Connecting Students to Science)
Beaver, John B., Ph.D.; Powers, Don

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� 7.40

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