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"SPEAKING two languages rather than just one has obvious practical benefits in an increasingly globalized world. But in recent years, scientists have begun to show that the advantages of bilingualism are even more fundamental than being able to converse with a wider range of people. Being bilingual, it turns out, makes you smarter. It can have a profound effect on your brain, improving cognitive skills not related to language and even shielding against dementia in old age. This view of bilingualism is remarkably different from the understanding of bilingualism through much of the 20th century. Researchers, educators and policy makers long considered a second language to be an interference, cognitively speaking, that hindered a child's academic and intellectual development. They were not wrong about the interference: there is ample evidence that in a bilingual's brain both language systems are active even when he is using only one language, thus creating situations in which one system obstructs the other. But this interference, researchers are finding out, isn't so much a handicap as a blessing in disguise. It forces the brain to resolve internal conflict, giving the mind a workout that strengthens its cognitive muscles. Bilinguals, for instance, seem to be more adept than monolinguals at solving certain kinds of mental puzzles. In a 2004 study by the psychologists Ellen Bialystok and Michelle Martin-Rhee, bilingual and monolingual preschoolers were asked to sort blue circles and red squares presented on a computer screen into two digital bins - one marked with a blue square and the other marked with a red circle. In the first task, the children had to sort the shapes by color, placing blue circles in the bin marked with the blue square and red squares in the bin marked with the red circle. Both groups did this with comparable ease. Next, the children were asked to sort by shape, which was more challenging because it required placing the images in a bin m

"Students have always faced distractions and time-wasters. But computers and cellphones, and the constant stream of stimuli they offer, pose a profound new challenge to focusing and learning. Researchers say the lure of these technologies, while it affects adults too, is particularly powerful for young people. The risk, they say, is that developing brains can become more easily habituated than adult brains to constantly switching tasks - and less able to sustain attention. "Their brains are rewarded not for staying on task but for jumping to the next thing," said Michael Rich, an associate professor at Harvard Medical School and executive director of the Center on Media and Child Health in Boston. And the effects could linger: "The worry is we're raising a generation of kids in front of screens whose brains are going to be wired differently." But even as some parents and educators express unease about students' digital diets, they are intensifying efforts to use technology in the classroom, seeing it as a way to connect with students and give them essential skills. Across the country, schools are equipping themselves with computers, Internet access and mobile devices so they can teach on the students' technological territory. "

"Have the latest advances in communication technology radically altered the fundamental dynamics of struggles for change in authoritarian settings? Or have cell phones and social media merely brought about small shifts in the dynamics of revolution? Is the Web a godsend to those trapped in oppressive states, as Nobel Laureate Liu Xiaobo suggests in his essay "The Internet is God's Gift to China"? Or does this thinking give in to a form of "cyber-utopianism" that glosses over the potential of new media to be used by autocrats, their propaganda ministries and security forces to massage public opinion, keep tabs on dissidents and ensure that populations stay docile and distracted, as Evgeny Morozov argues in The Net Delusion: The Dark Side of Internet Freedom? This is a fascinating moment to ponder such questions, due both to what is happening on the streets in the Middle East and in the offices of publishing, where Morozov's book is one of many to stake out bold claims about the pros and cons of the newest new media."