| What is Environmental Entrepreneurship? |
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| What Is Germ Theory? |
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6.8 |
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| What is Social Entrepreneurship? |
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| What Is Technology? |
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6.9 |
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| What Is the Rock Cycle? |
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6.4 |
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| What Is the Theory of Evolution? |
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8.5 |
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| What Is the Theory of Plate Tectonics? |
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6.6 |
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| Who's Who in WWII |
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6.1 |
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| Why Are Oceans Important? |
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| Why We Need Carbohydrates |
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| Why We Need Fats |
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| Why We Need Minerals |
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| Why We Need Proteins |
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| Why We Need Vitamins |
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| Why We Need Water and Fiber |
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| Wildfire Readiness |
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| William Lloyd Garrison: A Radical Voice Against Slavery |
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6.6 |
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| Winning Big: World and Euro Cup Soccer |
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6.2 |
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| Women Explorers Hidden in History |
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6.7 |
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| Women in the Renaissance |
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7.8 |
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| Women Writers Hidden in History |
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1.0 |
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| Workers' Rights |
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| Working Toward Abolishing Poverty |
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| Working Toward Abolishing Slavery |
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