Andrew Ng and Daphne Koller, Stanford University computer science professors who started Coursera, pose for a photo at the Coursera office in Mountain View, Calif., on Aug. 2, 2012. Jeff Chiu/AP hide caption

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Uintah Elementary School in Salt Lake City, where up to 40 students were served lunch Tuesday — only to have it discarded. They were told they didn't have enough credit on their accounts. Google hide caption

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Elite athletes at Team Academy keep up their education in classrooms like this one; their training facilities are downstairs in the same building. Sarah Brunson/USSA hide caption

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Silver Lake Elementary School in Middletown, Del., has begun implementing the national Common Core State Standards for academics. The GOP largely backs the standards that are rolling out in 45 states, but Tea Party conservatives have been critical — and liberals increasingly have the same complaints. Steve Ruark/AP hide caption

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Alexia is a condition often associated with the occipital lobe — the part of the brain that receives visual information. iStockphoto hide caption

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This handout provided by the Santa Monica Police Department shows ammunition, magazines and guns believed to have been dropped by a suspected gunman during a mass shooting at Santa Monica College in June 2013. Getty Images hide caption

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This image provided by the Orangeburg-Calhoun Regional Detention Center shows Justin Bernard Singleton, 19, of Charleston, who is charged with murder in the death of university student Brandon Robinson. Uncredited/AP hide caption

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A police officer walks out of the Electrical Engineering Building on the campus of Purdue University in West Lafayette, Ind., Tuesday. One person was killed in a classroom by a gunman who surrendered to a police officer within minutes of the attack, officials said. Michael Conroy/AP hide caption

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Chef Furard Tate says he wanted to "bring love back" to a Washington, D.C., neighborhood damaged since the 1968 riots. Allison Keyes/NPR hide caption

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