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WWI was a global war that centered in Europe that involved many of the world's great powers.
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Founded in 1921, National Council for the Social Studies has grown to be the largest association in the country devoted solely to social studies education.
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The Great Depression was a severe economic depression that continued the decade before World War II.
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The second world war was a global war that lasted from 1939 to 1945. It involved the vast majority of the world's nations—including all of the great powers—eventually forming two opposing military alliances: the Allies and the Axis.
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[Pearl Harbor](http:/http://www.youtube.com/watch?v=x1TnD45tGHo/)[Pearl Harbor Documentary](http://www.youtube.com/watch?v=x1TnD45tGHo)The attacks on Pearl Harbor were a surprise military strike conducted by the Imperial Japanese Navy against the United States naval base at Pearl Harbor, Hawaii, on the morning of December 7, 1941
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A war between the Republic of Korea (South Korea), supported by the United Nations, and the Democratic People's Republic of Korea (North Korea), at one time supported by the People's Republic of China and the Soviet Union.
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A time that established a class of rights that protect individuals' freedom from unwarranted infringement by governments and private organizations, and ensure one's ability to participate in the civil and political life of the state without discrimination or repression.
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Sputnik 1 was the first artificial Earth satellite to be launched into outer space.
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The Vietnam War was a Cold War-era military conflict that occurred in Vietnam, Laos, and Cambodia.
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Yuri Gagarin was a Soviet pilot and cosmonaut. He was the first human to journey into outer space, when his Vostok spacecraft completed an orbit of the Earth on 12 April 1961.
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An American astronaut named Neil Armstorng was the first person to walk on the moon at this time.
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Watergate was a political scandal that occurred in the United States in the 1970s as a result of the June 17, 1972, break-in at the Democratic National Committee headquarters at the Watergate office complex in Washington, D.C., and the Nixon administration's attempted cover-up of its involvement.
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The No Child Left Behind Act of 2001 (NCLB) is a United States Act of Congress that is a reauthorization of the Elementary and Secondary Education Act, which included Title I, the government's flagship aid program for disadvantaged students.
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The September 11 attacks were a series of four coordinated terrorist attacks launched by the Islamic terrorist group al-Qaeda upon the United States in New York City and the Washington, D.C. area on Tuesday, September 11, 2001.
