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Pigeons are not known for their algebra skills or intelligence generally. They don't talk like parrots. They don't make tools out of twigs like some crows.

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Schools across the country are on break this week, meaning that millions of students don't have to think even about algebra - or are they just missing the algebra that's all around them? We're joined now by our Math Guy, Keith Devlin of Stanford University, who joins us this week from member station KJAU in Boulder, Colorado. Keith, thanks so much for being with us.

KEITH DEVLIN, BYLINE: Hi, Scott. Nice to be here.

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This is WEEKEND EDITION from NPR News. I'm Scott Simon. Mitt Romney had one of the busiest public stretches of his presidential campaign this week. A big blue bus with his name on the side rolled along hundreds of miles of New Hampshire roads making more than a dozen stops to meet voters just three weeks before the primary. The campaign called it The Earn It Tour. NPR's Ari Shapiro was along for the ride.

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NPR's Lourdes Garcia-Navarro has spent much of this year covering the uprising and civil war in Libya. As she and her Libyan colleagues drove through the streets of Tripoli this week, they often found themselves listening to a legendary American country music song. The lyrics about changing fortunes seemed to ring true for Libya, as she tells us in this reporter's notebook.

LOURDES GARCIA-NAVARRO, BYLINE: If every conflict has a theme song, then Libya's for me is as unlikely as it is fitting.

(SOUNDBITE OF SONG, "THE GAMBLER")

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This is WEEKEND EDITION from NPR News. I'm Scott Simon. President Obama is in Hawaii with his family today. Yesterday, just before leaving Washington, D.C., he signed a bill to extend the payroll tax holiday and unemployment benefits for two months. It was a political victory for the president and for Democrats who had made extending the tax break a priority.

For Republicans in the House of Representatives though, it may have marked a political defeat. NPR's congressional correspondent reporter, Tamara Keith, has more.

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This is WEEKEND EDITION from NPR News. I'm Scott Simon. Coming up: A couch potato's holiday. It's time for sports.

(SOUNDBITE OF MUSIC)

SIMON: This weekend, the NBA gets going. The NFL gets extra thrilling. And the Boise State Broncos got to clean out their lockers. The boys in blue demolished Arizona State, 56 to 24 in the MAACO-Las Vegas Bowl. Now they got ahead home while lower ranked teams compete in the official bowl championship series games.

NPR's Tom Goldman joins us from Portland. Tom, thanks for being with us.

It's Christmas Eve, and many Latinos will celebrate the holiday tonight by unwrapping a delicious little present: tamales.

At its essence, a tamale consists of masa (a type of starchy corn dough) that's been wrapped in leaves, then steamed or boiled. Some come bundled in corn husks, others in plantain, banana or mashan leaves. Some are sweetened with molasses, others spiced with mole. Some are plain, others filled with meats or vegetables.

Part of a series

With the 2012 presidential election on the horizon, NPR's Debbie Elliott heads to Camden, S.C., to hear from the close-knit Gaither-James family. Like other African-Americans — considered the political base for President Obama — they're concerned about the economy and today's political climate.