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Smithsonian Institution
Cold War
The Cold War was not necessarily always cold in temperature, but the relationship between the United States and the Soviet Union sure was frigid! Scholars read various passages, view exhibition graphics, and observe an artifact from the...
Curated OER
Deep Subjects - Wells and Ground Water
Here is a phenomenal lesson plan on ground water, wells, and aquifers. Young geologists study how water exists underground, how water moves through the soil, and how water is extracted to be used as drinking water. Some excellent...