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Sophisticated brain-scan studies by Jay Giedd at the National Institute of Mental Health (NIMH) have shown dramatic changes throughout the teenage years as excess gray matter is pruned from the prefrontal cortex - the seat of higher-order thinking and making judgments (like not smoking weed right before your chemistry exam). Meanwhile, behavioral studies have shown what every parent already knows: teens have poor control over impulses and a tendency toward risk taking. Still, relatively little is known about how such changes affect learning or what happens at a biochemical level in the brain as teens go through their addled...
...might this relate to humans? Actually, mild stress has been shown to improve learning in people; too much does the opposite. Smith wonders whether the discovery may help explain certain learning declines, like the drop-off in the ability to learn to speak a foreign language without an accent, which occurs sometime around puberty...
...Keep Your Fingers Crossed When bubbles finally do burst, recent history has shown, they tend to do so with a bang. Is China, in fact, now at the end of its real estate boom? Many are not convinced. They point to a couple of factors that make China's situation different from that of the U.S. The first is that the real estate sector is nowhere near as reliant on debt financing as it is in the U.S. and much of the rest of the developed world. Consider the complex in which Yang, the cabbie, bought one of his three...
...This Tea Party Started Why is it that TIME's photomontage of members of the Tea Party movement did not contain even one image of what recent polls have shown to be the average Tea Party member: rural, older, white and male [March 1]? These photos were misleading. Kathleen Austin Chicago...
...know who will be the first to go? Thousands of energetic new teachers - simply because they were the last people hired. Sure, experience matters. But so do skill and energy. We must be able to make staffing decisions based on performance, not just time served. This President has shown an unprecedented willingness to challenge the powerful teachers' unions, but unless we finally eradicate these anachronistic employment rules, we'll continue to define reform as good intentions, extra dollars and insufficient results...