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shared by Megan Haddadi on 09 Jun 11 - No Cached

For years school curriculums have emphasized top-down instruction, especially for topics like math and science. Learn the rules first — the theorems, the order of operations, Newton’s laws — then make a run at the problem list at the end of the chapter. Yet recent research has found that true experts have something at least as valuable as a mastery of the rules: gut instinct, an instantaneous grasp of the type of problem they’re up against. Like the ballplayer who can “read” pitches early, or the chess master who “sees” the best move, they’ve developed a great eye.
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Now, a small group of cognitive scientists is arguing that schools and students could take far more advantage of this same bottom-up ability, called perceptual learning
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shared by Demetri Orlando on 19 Dec 11 - No Cached

shared by Demetri Orlando on 03 Jan 17 - No Cached

The successful transformation of our living conditions was possible only because of collaboration.
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It is our collective brains and our collaborative effort that are needed for such an improvement.
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Big problems remain.
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...1 more annotation...
It is far from certain that we will make progress against these problems. There is no iron law that would ensure that the world continues this trend of improving living conditions. But what is clear from the long-term perspective is that the past 200 years brought us to a better position than ever before to solve these problems. Solving problems — big problems — is always a collaborative undertaking. And the group of people that is able to work together today is a much, much stronger group than there ever was on this planet. We have just seen the change over time; the world today is healthier, richer, and better educated.
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