Experts suggest that half of a child’s computer time should be educational and that multitasking while studying should be limited. Read more..

By MATT RICHTEL - The New York Times

The Air Force accidentally sent each bidder for an aerial tanker contract sensitive data about the other’s proposal, Pentagon officials said. Read more..

By CHRISTOPHER DREW - The New York Times

The constant stream of stimuli offered by new technology poses a profound new challenge to focusing and learning. Read more..

By MATT RICHTEL - The New York Times

As Irish and European officials discussed a rescue, Prime Minister Brian Cowen said a low corporate tax rate and plan to reduce the budget would not be substantially changed. Read more..

By LANDON THOMAS, Jr - The New York Times

Patients with chronic kidney disease who took Vytorin, a cholesterol-lowering pill, had one-sixth fewer heart attacks, strokes or operations to unblock their arteries than patients taking a placebo. Read more..

By NATASHA SINGER - The New York Times

The Transportation Security Administration will let uniformed airline pilots skip body scans and pat-downs. Read more..

By RON NIXON - The New York Times

Authorities are at an advanced stage of an insider-trading investigation that could result in criminal charges against Wall Street traders, a government official said. Read more..

By PETER LATTMAN - The New York Times