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The Truth About Homework

The Truth About Homework
September 6, 2006 The Truth About Homework Needless Assignments Persist Because of Widespread Misconceptions About Learning By Alfie Kohn Para leer este artículo en Español, haga clic aquí. There’s something perversely fascinating about educational policies that are clearly at odds with the available data. The dimensions of that last disparity weren’t clear to me until I began sifting through the research for a new book. In high school, some studies do find a correlation between homework and test scores (or grades), but it’s usually fairly small and it has a tendency to disappear when more sophisticated statistical controls are applied. The results of national and international exams raise further doubts. Finally, there isn’t a shred of evidence to support the widely accepted assumption that homework yields nonacademic benefits for students of any age. Sandra Hofferth of the University of Maryland, one of the authors of that study, has just released an update based on 2002 data.

An Essay by Einstein -- The World As I See It "How strange is the lot of us mortals! Each of us is here for a brief sojourn; for what purpose he knows not, though he sometimes thinks he senses it. But without deeper reflection one knows from daily life that one exists for other people -- first of all for those upon whose smiles and well-being our own happiness is wholly dependent, and then for the many, unknown to us, to whose destinies we are bound by the ties of sympathy. A hundred times every day I remind myself that my inner and outer life are based on the labors of other men, living and dead, and that I must exert myself in order to give in the same measure as I have received and am still receiving... "I have never looked upon ease and happiness as ends in themselves -- this critical basis I call the ideal of a pigsty. "My passionate sense of social justice and social responsibility has always contrasted oddly with my pronounced lack of need for direct contact with other human beings and human communities.

The Open Organisation Of Lockpickers :: Meetings This is a repository of the most up-to-date versions of Deviant's lock diagrams and animations. Seen in all of the TOOOL educational materials and slide decks, these files are all released under the Creative Commons license. You are free to use any of them for non-commercial purposes, as long as they are properly attributed and the same freedom for others is maintained in all derivative works. Please note that these diagrams have evolved and developed over time. While Deviant is still proud of the older versions of his images, if you still have copies of legacy material they should all be replaced with the latest versions available here. Each image shown below in thumbnail form can be accessed in high resolution individually, or you can obtain the full set from the zip archive at the bottom of this page. Lock Basics and Mechanical Operation How pin tumblers are arranged and how locks operate (or fail to) with conventional keys Introduction to Lockpicking Manipulation-Resistant Locks

Seven Blunders of the World The Seven Social Sins, sometimes called the Seven Blunders of the World, is a list that Mohandas Karamchand Gandhi published in his weekly newspaper Young India on October 22, 1925.[1] Later, he gave this same list to his grandson Arun Gandhi, written on a piece of paper, on their final day together, shortly before his assassination.[2] The seven sins or blunders are: History and influence[edit] Mahatma Gandhi, who published the list in 1925 as a list of "Seven Social Sins" (1940s photo) The list was first published by Mohandas Karamchand Gandhi in his weekly newspaper Young India on October 22, 1925.[1] Gandhi wrote that a correspondent who he called a "fair friend" had sent the list: "The... fair friend wants readers of Young India to know, if they do not already, the following seven social sins,"[1] (the list was then provided). In the decades since its first publication, the list has been widely cited and/or discussed. Easwaran, Eknath (1989). Gomes, Peter J. (2007). See also[edit]

7 Common Habits That Secretly Make You Anxious Do you know why so many people have trouble dealing with anxiety? Simply put, it boils down to a lack of perspective. Most of us think of anxiety as something that’s irrevocably… out there; as though it were an ominous and invisible threat plotting against our well-being. All too frequently, people conceive of anxiety as an external factor they cannot possibly control. You may not be aware of it, but there are common habits of the mind and body that you constantly indulge, which secretly add up to your anxiety. Coffee: Often regarded as a harmless beverage, coffee is actually a highly additive anxiety-inducing drug; it makes people more alert, but it also makes them jittery and nervous. Refined Sugars: Likewise with coffee, refined sugars are also quite widespread and very much additive. Sedentary lifestyle: One of most common patterns among anxiety sufferers is leading a highly sedentary living with little to no physical activity. Remember, anxiety is not your enemy. Related Reading:

Advice for Starting Wingsuit BASE jumping : Skydiving Articles - Visit for more BASE jumping information, articles, photos, videos and discussions Download Full Article in PDF 1. Introduction: We have all seen the amazing videos of people like Robert, Yuri and Loic flying their wingsuits. This document is intended as an initial information source for BASE jumpers interested in starting wingsuit BASE. This document is not an instruction manual. Wingsuit BASE is more dangerous than normal BASE jumping if the jumper does not conduct adequate preparation. If you choose to pursue wingsuit BASE you are strongly recommended to seek instruction from an experienced wingsuit BASE jumper. A wingsuit allows for incredible freefall delays and horizontal distances to be achieved, almost eliminating the chance of striking the object you jumped off, the number one cause of BASE jumping fatalities. But jumping a wingsuit also has some serious drawbacks: 2. An intermediate BASE jumper: With minimum 50 BASE jumps (but more jumps are strongly recommended!) 3.

Disconnect Between Brain Regions in ADHD Skip to comments. Disconnect Between Brain Regions in ADHD University of California ^ | January 11, 2010 | Unknown Posted on Mon Jan 11 23:43:07 2010 by decimon Two brain areas fail to connect when children with attention deficit hyperactivity disorder attempt a task that measures attention, according to researchers at the UC Davis Center for Mind and Brain and M.I.N.D. "This is the first time that we have direct evidence that this connectivity is missing in ADHD," said Ali Mazaheri, postdoctoral researcher at the Center for Mind and Brain. The researchers measured electrical rhythms from the brains of volunteers, especially the alpha rhythm. In the experiments, children with diagnosed ADHD and normal children were given a simple attention test while their brain waves were measured. And that is what the researchers found in the brain waves of children without ADHD. "Clearly the crosstalk from bedside to bench has been fruitful," she said. * Center for Mind and Brain Media contact(s): Huh?

Adderall Adderall® CII is a pharmaceutical amphetamine used to treat attention-deficit hyperactivity disorder and narcolepsy. It was first prescribed in the 1970s as an anorectic (under the brand name Obetrol®), but such usage is now rare. Adderall is a central nervous system stimulant composed of four amphetamine salts: amphetamine aspartate, amphetamine sulfate, dextroamphetamine saccharate, and dextroamphetamine sulfate (the last salt is also prescribed alone as Dexedrine®). The four component salts are claimed to be metabolised at different rates. The average elimination half-life for dextroamphetamine is 10 hours in adults, and for levoamphetamine, 13 hours. The manufacturer claims that the mixture of salts makes Adderall's effects smoother, with softer highs and lows, than those of other treatments for the same disorders. There is little evidence, however, to support this claim for immediate-release Adderall. Weitz & Luxenberg is no longer accepting ADHD drug cases. Adderall Side Effects

The Many Factors that Determine Video Quality - Datatoys Data & Video Systems What Determines Video Quality? Video quality is one of the least understood and most complex aspects of digital video; it’s no wonder why this is our most popular question from customers. The actual quality of your video is determined by many factors that work together in a complex synergy to create a digital video file. There are many myths about video quality which this article hopes to dispel. Video quality is dependent on a balance two primary devices; the camera or “input” and recorder. Each of these two devices has several sub-factors that work together to determine the overall output quality of that specific component. Camera – Factors That Determine Video Quality The output quality of camera is derived from the performance of five main components; lens, image sensor type, image sensor size, effective pixels, and the signal processor. Lens Impact: 2/5 The lens is used to direct light onto a camera’s imaging sensor. Image Sensor Type Impact: 5/5 Image Sensor Size Impact: 4/5

What Happens when Countries Go Bankrupt? No, Alexander Lukyanchenko told reporters at a hastily convened press conference last Tuesday, there is "no reason whatsoever to spread panic." Anyone who was caught trying to throw people out into the street, he warned, would have the authorities to deal with. Lukyanchenko is the mayor of Donetsk, a city in eastern Ukraine with a population of a little more than one million. For generations, the residents of Donetsk have earned a living in the surrounding coalmines and steel mills, a rather profitable industry in the recent past. But last Tuesday the mayor, returning from a meeting with business leaders, had bad news: two-thousand metalworkers would have to be furloughed. Under these conditions, how could panic not be rampant in Donetsk, the capital of Ukraine's industrial heartland? Donetsk is in eastern Ukraine, 8,100 kilometers (5,030 miles) from New York's Wall Street and 2,700 kilometers (1,677 miles) from Canary Wharf, London's financial center. The Ghost of Buenos Aires

Diamond 4 C's Most diamonds in North America are classified according to the 4 c's- carat, colour, clarity, and cut. Carat Carat is the system of measuring the weight of a diamond. Colour Colour is a grading system that determines how closely the diamond comes to being colourless; the less colour, the more valuable the gemstone. Clarity Clarity is the measure of the absence of inclusions (internal) and blemishes (external) in a natural diamond. FL- flawless (no inclusions or blemishes and very rare)IF-internally flawless (no inclusions only blemishes)VVS1-2 -very very slightly included (inclusions that are very hard to see under magnification)VS1-2- very slightly included (inclusions visible under magnification but minor).SI1-2- slightly included (typically visible under magnification)I1-3- included (visible flaws which may be seen by the naked eye) Cut While nature provides the diamond with its colour, clarity and carat weight, it is the skilled diamond cutter that unleashes the inner fire and beauty.