Education

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Students hold their position during a yoga class at Capri Elementary School in Encinitas, Calif., on Wednesday, Dec. 11, 2012. (AP Photo/Gregory Bull)

Rebekah Stuck hugs her son, Aiden, 7, after she found him in front of the destroyed Briarwood Elementary School after a tornado struck south Oklahoma City and Moore, Okla., on Monday, May 20, 2013. Aiden was inside the school when it was hit. (AP Photo/The Oklahoman, Nate Billings)

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A parent rushes to embrace her child as a teacher escorts her away from Briarwood Elementary school after a tornado destroyed the school in south Oklahoma City, Okla,, Monday, May 20, 2013, near SW 149th and Hudson. (AP Photo/ The Oklahoman, Paul Hellstern)

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Teachers carry children away from Briarwood Elementary school after a tornado destroyed the school in south Oklahoma City, Okla, Monday, May 20, 2013. Near SW 149th and Hudson. (AP Photo/ The Oklahoman, Paul Hellstern)

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A teacher hugs a child at Briarwood Elementary school after a tornado destroyed the school in south Oklahoma City, Monday, May 20, 2013. A monstrous tornado roared through the Oklahoma City suburbs, flattening entire neighborhoods with winds up to 200 mph, setting buildings on fire and landing a direct blow on an elementary school. (AP Photo/The Oklahoman, Paul Hellstern)

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A woman carries a child through a field near the collapsed Plaza Towers Elementary School in Moore, Okla., on May 20, 2013. A tornado as much as half a mile wide with winds up to 200 mph roared through the Oklahoma City suburbs, flattening entire neighborhoods, setting buildings on fire and landing a direct blow on an elementary school. (Associated Press)