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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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    What is Trade?
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    5.7   | 
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    What Just Happened? Reading Results and Making Inferences
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    5.6   | 
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    What Makes Your Body Work?
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    What Makes You You?
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    What senses do animals have?
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    4.2   | 
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    What's Going On? Collecting and Recording Your Data
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    5.5   | 
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    What's Going to Happen? Making Your Hypothesis
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    5.5   | 
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    What Should I Do? Making Good Decisions
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    What's in the Midwest?
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    5.4   | 
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    What's in the Northeast?
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    6.6   | 
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    What's in the Southeast?
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    6.8   | 
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    What's in the Southwest?
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    6.9   | 
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    What's in the West?
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    6.5   | 
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    What's the Difference?: Plays About Tolerance
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    4.0   | 
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    What's the Plan? Designing Your Experiment
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    5.2   | 
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    What's the Problem? How to Start Your Scientific Investigation
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    5.5   | 
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    Wheels and Axles in My Makerspace
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    Where Does Lightning Come From?
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    Where Do I Belong?: Plays About Fitting In
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    3.7   | 
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    Where Food Comes From (4 titles)
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    White Marlin Readers (6 titles)
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    Who Ate the Butterfly? A Rainforest Food Chain
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    3.9   | 
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