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Take the notion that children have specific learning styles, that some are “visual learners” and others are auditory; some are “left-brain” students, others “right-brain.” In a recent review of the relevant research, published in the journal Psychological Science in the Public Interest, a team of psychologists found almost zero support for such ideas.

Granted, there are no papers to grade, and assignments aren’t free-form, but how does one professor handle so many students? We had four teaching assistants, and my initial plan was that they would spend a lot of time on the discussion forum, answering questions. One night in the early days, I was on the forum at 2 a.m. when I saw a student ask a question, and I was typing my answer when I discovered that another student had typed an answer before I could. It was in the right direction, but not quite there, so I thought I could modify it, but then some other student jumped in with the right answer. It was fascinating to see how quickly students were helping each other. All we had to do was go in and say that it was a good answer. I actually instructed the T.A.’s not to answer so quickly, to let students work for an hour or two, and by and large they find the answers.

Most students who register for MOOCs don’t complete the course. Of the 154,763 who registered for “Circuits and Electronics,” fewer than half even got as far as looking at the first problem set, and only 7,157 passed the course. What do you make of that?

EdX operates under an honor code, with no way to verify that the student who registered is the one doing the work. Is that likely to change? It’s quite possible employers would be happy with an honor certificate. We’re looking at various methods of proctoring. We have talked about people going to centers to take exams. There are also companies that use the cameras inside a laptop or iPad to watch you and everything else that’s happening in the room while you take an exam, and that may be more scalable.

If you doubt that we live in a winner-take-all economy and that education is the trump card, consider the vast amounts the affluent spend to teach their offspring.

This power spending on the children of the economic elite is usually — and rightly — cited as further evidence of the dangers of rising income inequality.

But it may be that the less lavishly educated children lower down the income distribution aren’t the only losers. Being groomed for the winner-take-all economy starting in nursery school turns out to exact a toll on the children at the top, too.

opening to lukewarm, if not downright hostile, reviews, Arthur Miller’s play “The Crucible” continues to be mounted and taught worldwide because it speaks to universal fears of social isolation and the unknown – fears especially present in a rapidly changing world, not to mention in the topsy-turvy social order of school.

teachers fill out short behavior questionnaires, called Conners rating scales, which assess things like “squirminess” on a scale of one to five. In many cases, I discovered, diagnoses hinge on the teachers’ responses.

the formidable list of possible side effects included difficulty sleeping, dizziness, vomiting, loss of appetite, diarrhea, headache, numbness, irregular heartbeat, difficulty breathing, fever, hives, seizures, agitation, motor or verbal tics and depression. It can slow a child’s growth or weight gain. Most disturbing, it can cause sudden death, especially in children with heart defects or serious heart problems.

We come to the floor today, colleagues of Congresswoman Gabby Giffords, to salute her as the brightest star among us, the brightest star Congress has ever seen,” said the House Democratic leader, Representative Nancy Pelosi of California

Teachers — many of them — will continue to resent efforts to use standardized tests to measure their ability to teach.

Tucker, 72, a former senior education official in Washington, is the president of the National Center on Education and the Economy, which he founded in 1988. Since then he has focused much of his research on comparing public education in the United States with that of places that have far better results than we do — places like Finland, Japan, Shanghai and Ontario, Canada. His essential conclusion is that the best education systems share common traits — almost none of which are embodied in either the current American system or in the reform ideas that have gained sway over the last decade or so.

His starting point is not the public schools themselves but the universities that educate teachers. Teacher education in America is vastly inferior to many other countries; we neither emphasize pedagogy — i.e., how to teach — nor demand mastery of the subject matter. Both are a given in the top-performing countries. (Indeed, it is striking how many nonprofit education programs in the U.S. are aimed at helping working teachers do a better job — because they’ve never learned the right techniques.)

Scientists say juggling e-mail, phone calls and other incoming information can change how people think and behave. They say our ability to focus is being undermined by bursts of information. These play to a primitive impulse to respond to immediate opportunities and threats. The stimulation provokes excitement — a dopamine squirt — that researchers say can be addictive. In its absence, people feel bored.

“The technology is rewiring our brains,” said Nora Volkow, director of the National Institute of Drug Abuse and one of the world’s leading brain scientists. She and other researchers compare the lure of digital stimulation less to that of drugs and alcohol than to food and sex, which are essential but counterproductive in excess.

While many people say multitasking makes them more productive, research shows otherwise. Heavy multitaskers actually have more trouble focusing and shutting out irrelevant information, scientists say, and they experience more stress.