character: Navigator Ned
topic: Seas and Oceans of the Past
grade: 3
subject: Geography
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character: Captain Coral
topic: Marine Ecosystems
grade: 3
subject: Geography
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character: Adventurous Annie
topic: Exploration of World Oceans
grade: 3
subject: Geography
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character: Oceanographer Ollie
topic: Ocean Currents and History
grade: 3
subject: Geography
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