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Damianne President

Color - Method of Action - 7 views

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    This game teaches about saturation, hue, complementary colors, analog, etc.
Peter Beens

How to remember what you read | Polyglot Tutor - 145 views

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    In our information-saturated century most of us need help to memorize things efficiently. But it's hard to remember what we have learned. What can we do? Ability to appreciate and organize your study time may help to improve memory skills. Here are some tips.
Jennifer Diaz

How to Make Rock Candy with Step-by-Step Pictures - wikiHow - 51 views

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    How to Make Rock Candy, including a video.  Great for showing supersaturation for Science!
Tracy Tuten

The Irascible Professor on "The SAT that isn't (the death of aptitude.)" - 2 views

  • It used to be that the SAT was distinguished from its competitor the ACT by the fact that the former was seen as measuring aptitude and being effectively un-coachable, while the latter was a gauge of achievement in learning.
  • At the risk of sounding pejorative, I'd say that I was expecting the test to be a measure of who I was, while some of my fellow students and their parents treated it more as a test of how they could present themselves to admissions officers.  And while I wouldn't suggest that people tend to think of it in these terms, I believe that the latter perception relies on the academically damaging belief that an individual student's capabilities need not matter to what goals he sets for himself.  That perception leads people to believe that there is something inherently unfair about a test that you can't study for.
  • And if after four years of high school they haven't developed much skill for reasoning, that's okay – they can take preparatory courses to learn how to fake it for an exam, and let that be their stepping stone toward academic accomplishment.  As a society that values the promise of formal education more than the satisfaction of actual learning, we have precipitated the death of aptitude.  We are afraid to acknowledge that it exists, because aptitude, whether the product of inborn talent or effective rearing, makes some people better suited than others for certain goals.
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  • Lori Gottlieb, writing in The Atlantic last year, claimed that child-rearing in the current generation has been excessively focused on preserving self-esteem.  As an illustration of one symptom of this, Gottlieb quoted clinical psychologist Wendy Mogel as saying that parents are actually relieved to be told that their struggling children are learning disabled, so that today "every child is either learning disabled, gifted, or both – there's no curve left, no average."  To claim a learning disability is the only way to set legitimate lower benchmarks for performance.  Kids are never just bad at anything anymore, because that's seen as being more harmful to self-esteem.
  • But my worries about the individual effects of the death of aptitude are dwarfed by my concern for its effect on the institutions of higher learning that those individuals are entering.  College is not a one-directional relationship of dispensing knowledge to young people.  The entire institution gains or loses value on the basis of what its students put into it.  By telling students with low aptitude and low interest that they can, should, and must strive to accomplish the same things as their higher-achieving peers, I fear that we're saturating higher education with people who subtract value from their institutions by committing minimum effort and lowering whatever curve still exists for the measurement of performance.
  • We all seem to agree that standards for college readiness need to improve, but you'll hear virtually no one asserting that when those standards are not met, the student ought to leave off college altogether, or to defer it until they have acquired, by sheer will or by natural intellectual growth, the aptitude to be successful at the proper level.  Indeed, just as common in criticism of education is the sentiment that we must see to it that more children enter and complete college.  But if those children don't have the aptitude to do so, the goal of improving college curriculum contradicts the goal of college-for-all.
  • We can't keep pretending that there is no such thing as aptitude and that every child has equal cause to vie for the topmost positions of intellectual esteem.  It does a disservice to the student and the school in kind.
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    An essay on what the SAT says about society's view of education, accomplishments, aptitude, and self-esteem. 
Sreedharen Sasidharen

Magnet - Wikipedia, the free encyclopedia - 11 views

    • Sreedharen Sasidharen
       
      What is it?
  • A magnet (from Greek μαγνήτις λίθος magnḗtis líthos, "Magnesian stone") is a material or object that produces a magnetic field. This magnetic field is invisible but is responsible for the most notable property of a magnet: a force that pulls on other ferromagnetic materials, such as iron, and attracts or repels other magnets.
  • Ferromagnetic materials can be divided into magnetically "soft" materials like annealed iron, which can be magnetized but do not tend to stay magnetized, and magnetically "hard" materials, which do. Permanent magnets are made from "hard" ferromagnetic materials such as alnico and ferrite that are subjected to special processing in a powerful magnetic field during manufacture, to align their internal microcrystalline structure, making them very hard to demagnetize. To demagnetize a saturated magnet, a certain magnetic field must be applied, and this threshold depends on coercivity of the respective material. "Hard" materials have high coercivity, whereas "soft" materials have low coercivity.
Donna Roper

Twittering, Not Frittering: Professional Development in 140 Characters | Edutopia - 15 views

  • Although some people argue that Twitter is one more distraction in a tech-saturated world, David Cosand says it's been a time-saver for him. He was writing a grant proposal recently to buy more technology for his school and realized he needed to learn more about document cameras. "I put a tweet out asking people which cameras they have found useful. In half an hour, I got great feedback from all over the country," he says, and he wound up narrowing down the list to an AVerVision CP300 model.
anonymous

The End of the Facebook Era - 32 views

  • As your Facebook network becomes saturated,
    • anonymous
       
      yo hello
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