History
Science
Elements and Compounds – Science for kids (With Quiz)
Math
US Standard Lengths – Math is Fun
English
What is an Indirect Object? English Grammar for Beginners | Basic English
Latin
The First Declension by latintutorial
Geography
Erie Canal | canal, United States | Britannica.com
Pennsylvania and Ohio Canal | canal, United States | Britannica.com
Chesapeake and Ohio Canal | waterway, United States | Britannica.com
Ohio and Erie Canal | waterway, United States | Britannica.com
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