A growing number of children are entering puberty at younger ages — sometimes as young as 6 or 7. But in many schools, sex education classes don't begin before the fifth grade. Cuneyt Hizal/iStockphoto.com hide caption

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Customers test out iPad minis on display in Los Angeles. Students who received free iPads from the Los Angeles Unified School District in a deal with Apple are finding ways to use them for more than just classwork. Kevork Djansezian/Getty Images hide caption

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Students and alumni line up at Howard University in Washington, D.C., before August's commemoration of the 50th anniversary of the March on Washington. Nathaniel Grann/The Washington Post/Getty Images hide caption

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New York University in Shanghai is the first Sino-U.S. joint university. Here, a student speaks with an NYU staffer on Aug. 11. Liu Xiaojing/Xinhua /Landov hide caption

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Former Arizona Rep. Gabrielle Giffords, accompanied by her husband, retired astronaut Mark Kelly, speaks during a news conference in Manchester, N.H., in July. They were there to encourage state political leaders to have courage in the fight to expand background checks on gun purchases. Mary Schwalm/AP hide caption

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The Common Core Standards establish academic expectations across states in math and English language arts. iStockphoto.com hide caption

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Adjunct professors at Duquesne University in Pittsburgh are trying to unionize. The death of a longtime, part-time employee has put the debate in a larger forum. Ronald Woan/Flickr hide caption

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