character: Green Gabby
topic: Hydroelectric Power Systems
grade: 6
subject: Computer Science
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character: Eco Erin
topic: Renewable Energy Sources
grade: 6
subject: Computer Science
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character: Techie Tim
topic: How Computers Help Control Power Systems
grade: 6
subject: Computer Science
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character: Wattson the Wise
topic: The Importance of Water in Power Generation
grade: 6
subject: Computer Science
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