DuplicateGrade 7: Viking Age Expansion and Trade Routes
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DuplicateGrade 10: The Rise of Venice and the Trade of the Maritime Republics
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DuplicateGrade 11 (High School): Process and Key Figures of the Cuban Revolution
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DuplicateGrade 9: Justinian's Code and Architecture of the Byzantine Empire
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DuplicateGrade 11 (High School): Categorizing FDR's New Deal Measures
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DuplicateGrade 8: Social Reform Movements in the U.S. Progressive Era
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DuplicateGrade 10: Major Battles and Conquered Territories of the Napoleonic Wars
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DuplicateGrade 7: Maya Mathematics and Astronomical Achievements
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DuplicateGrade 11 (High School): U.S. Anti-War Movement During the Vietnam War
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DuplicateGrade 9: Timeline of the Mongol Empire's Expansion
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DuplicateGrade 11 (High School): Process and Key Figures of the Russian October Revolution
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DuplicateGrade 8: Distribution and Characteristics of Major Native American Tribes
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DuplicateGrade 10: International Brigades in the Spanish Civil War
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DuplicateGrade 11 (High School): Formation of the Allied and Central Powers in WWI
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DuplicateGrade 10: Key Figures of the Reformation and Denominational Splits
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DuplicateGrade 7: Egyptian Pharaoh Dynasties and Major Constructions
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DuplicateGrade 8: Debates and Compromises at the U.S. Constitutional Convention
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DuplicateGrade 11 (High School): Major Inventions of the British Industrial Revolution
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DuplicateGrade 9: Routes and Impacts of the Crusades
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DuplicateGrade 6: Athens vs. Sparta (Greek City-States)
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