No Khan Do

Salman Khan makes educational videos, lots of educational videos, using a simple technique--he draws out his thoughts on a "blackboard," while he thinks aloud. Much like someone unwrapping a problem on a napkin or on an old slate blackboard.


Bill Gates has practically adopted him, and the ed reformerati love him. He's an MIT grad, he's multicultural, he's an ex-hedge fund manager (maybe his biggest cachet, a sad reflection of our culture), and he's kinda cute. In an Ivy League rules kind of way. (What do I know, I used to be a stevedore....)

Sal Khan helps kids learn how to regurgitate what we already have in textbooks, without reading the textbooks, a video CliffsNotes for the now generation. He allows the worst parts of education to be efficiently streamlined for ingestion, about as effective and useful as cod liver oil. It works, but it's over-rated.

In the end, I think it's a student's ability to pause, rewind, and rehash what Khan says that makes him so valuable, and which makes his brand so sad--really, really sad. I'm a teacher, and a pretty good one. We need to pay attention to what our kids don't know.

If 21st century learning boils down to a hyped up version of what we did back in the 1930's, we're screwed. If Bill Gates is the valued judge of what education means (go learn his history), we're screwed. If we cannot do better in the classroom than Mr. Khan can do with his SmoothDraw and Camtasia (or what any of us can do on the back of a cocktail napkin), we're screwed.

Relax, we're not screwed (yet). Be better than the videos, not a hard task, unless regurgitation floats your boat.






Frank Noschese destroys Mr. Khan in a series of blog posts with far more sophistication than me.
Blackboard via Shorpy.












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Slow seeing

If you want to kill a child's interest in astronomy, buy her the biggest piece of glass you can afford the first hour she expresses any interest in the stars. Make sure it's got a computer-guided star finder, and that it "talks" to her as she explores the skies. Better yet, have her log onto a remote telescope where she can "guide" the scope to spectacular deep sky objects, seeing details on a screen that would dazzle Galileo himself.

I wouldn't give a child on a tricycle the keys to a Suzuki Hayabusa GSX1300R just because she's decided she want to advance to a bicycle (even if motorcycles did come with training wheels).


There is a push, a huge push, to digitize classrooms, to get connected, to leap into the 21st century. It's all quite exciting, and there's plenty of money to be made, and ooh, shiny, shiny!

Many of those who hawk promote the digital classroom, presumably for the best interests of the children, seem particularly prone to a binary view of the universe. If you're not with us, you're against us.

I know they are busy people--so many new gadgets, so little time to master the New Best Thing--but they're screwing up the ed world a bit with their listlessness. I'll make this quick.

A child who cannot see the grace of a caterpillar using only her eyes and enough free time to think will not benefit from a magnifying glass.


A child who cannot see the finer details offered by a magnifying glass, a tool used with the caterpillar still whole (and alive), will gain nothing by looking at a slide of caterpillar tissue under a microscope, and the child might reasonably ask if you really needed to kill the caterpillar.


Gypsy moth caterpillar, by Materialscientist

Here's my point. Put down the iPad for a moment, stop texting, let your scattered thoughts dissipate.

Humans have the same cognitive and sensory tools today that we had a few generations ago. Observing the world is an acquired skill that cannot be learned through a screen. It requires interest, it requires time, and it requires building an internal scaffold that allows the child to make some sense of this universe.

Very few high school sophomores observe well, and it's to our shame that those who do, often do despite their formal education. My best students of the natural world are often the least able to function in a classroom.

Before you jam down the latest version of the Graflex Schoolmaster 750 filmstrip projector into my classroom--and when you get down to it, the Smart Board doesn't add a whole lot to the original concept--make sure you have given me enough time and space to teach the children how to see.


Give that much room, then you can have them to manipulate as you will. If I have done my work well, their excrement detectors will scream at the crap that passes for rational discourse these days. Good teachers--parents, neighbors, school teachers, librarians, the corner philosopher ranting at the #34 NJ Transit bus every time it rolls by--focus on meeting a child where she is in the universe, and just about all children are a decade or two away from mastering a scanning electron microscope or a raging road bike like the Suzuki Hayabusa GSX1300. Some of them will never be ready for either, and that's OK, too.

Ironically, anyone who takes the time to look around can see that we are blindly headed to catastrophe. We cannot afford another generation of Americans who think they'd rather not think.






The Suzuki phot came from Motorcycle Best Picture blog--don't know yet who to credit.
The caterpillar is from Wikipedia by Materialscientist, released under GNU FDL
The Brayco Projector ad taken from The Bray Animation Project, permission pending
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A clammer meets the internets

After yesterday's dust off, where I tangentially blame modern technology for the impending collapse of, well, everything, I thought I might need to re-establish some semblance of credentials for the edutech crowd, and perhaps even more important, potential employers.

I had long planned to go clamming this morning. We got people coming over tonight, and nothing beats fresh clams, except maybe fresh tomatoes, and we got those, too.

My trusty paper tide charts (courtesy of Jim's Bait and Tackle), confirmed online,  predicted that the sweetest clam bed south of Newfoundland will lay open mid-morning today.The kayaks are loaded, my clam bucket sits on the back stoop, and my rake is repaired and ready.


Alas, it rained last night. Rain flushes out the street sewers, which hold pretty much anything and everything the ground holds--cigarette butts, squirrel poop, herbicides, human spittle and other fluids, and all kinds of other matter subject to the law of gravity. A cherry stone will filter about 10 or so gallons of baywater a day, and I figure a chowder might do double that.

I have a general policy similar to a few states (though New Jersey, land of the free-to-ingest-whatever, is not one of them)--if it rains a decent amount the day before clamming, best not clam.

A decent amount for me means 1 inch, from the Latin uncia, 1/12th. Why a twelfth? Why a foot? What science is behind my tolerance? Well, very little. I surveyed the internets again, saw that Maryland closes beds for 1" rainfall, Massachussetts uses 1" in the winter, but only 0.6" in the summer (more squirrel poop around, I guess), and NJ, well, last time any bed got closed for rain was a year ago April so maybe we're not paying real close attention.

We got dumped on last night. How much? Well, I could wander outside and peek into a bucket, all of 15 feet away, but then I'd need to find my measuring tape, last used to measure the fluke I cannot keep, which means finding my fishing bag, which I think I left in the car, and, well, it's easier to look at a screen than get up and walk. Besides, it might be muddy outside. Not to mention the squirrel poo....

According to the internets, our local airport, only a couple of miles away, got 1.89 inches of rain last night. (Imagine that, we're measuring to the hundredths of twelths of some ancient foot standard...a freaking fifth of a millimeter for our more enlightened global neighbors....and which just happens to be the length of your run of the mill Paramecium caudatus.)

So no fresh clams tonight....had it rained 90 paramecium lengths (PLs) less, that is, had my bucket outside only held 99 PLs instead of the 189 PLs it would have held had I left it right side up and moved it two miles away to our nearest airport, I'd be clamming at this very moment, risking skin cancer and contamination with squirrel poop.


Here's a picture of a P. caudatus, just in case we go to that as a standard:













The paramecium photo is by Barfooz, released under Gnu FDL
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A response to a technophile

This post is a mess, an amalgam of several yet-born posts swirling about.


This is a tool, made by Takeshi Yamada,  an artist who saw visions while surveying horseshoe crabs on the shores of our bay.

It is a pen crafted from the tail of a horseshoe crab. Mr. Yamada uses it almost every day, to create stunning images.

Compared to some tools, his pen may be thought inefficient. It certainly lacks the precision of a YAG laser engraver , or even a Koh-I-Noor 5611 drafting pencil, but that's not the point. That's not the point at all.

Mr. Yamada is human, with the same frailties as any of us, with the same natural curiosity. He did not learn to use his telson in an American school. There is no place for it there.

Credit: Dennis B. Smith, Leadholder.com
Unique does not guarantee better. Unique things are often unique because they are not worth reproducing. Technology thrives on precise, efficient, reproducible results. There is little room for Mr. Yamada in the industrial world.

Mr. Yamada's work, however, gives me pleasure. His work pleases others as well. Someone shared it with me, now I share it with you.

***

Gerald Aungst, "a supervisor of gifted children," writes for Connected Principals, a shared blog written by school administrators, a blog well worth visiting. His recent post "Why 'I Don’t Do Technology' Isn’t Acceptable" raises some good points, and I have no qualms with the thesis of its title. His arguments within the article, however, reveal some interesting thoughts shared by many technophiles, and I'd like to offer some views from the other side of the aisle, an aisle I straddle with my Google + account in my right hand, my Dixon Ticonderoga No. 2 pencil in my left.

Go read the post. I'll go check my sundial and pick weeds from my garden while you read.

***
"Some people argue that technology is simply a tool to be applied where and how it’s appropriate. Others say no technology is neutral and we have to be deliberate in our choices to use it."

The two are not mutually exclusive--"appropriate" covers a lot of ground. We also should consider what is lost when a newer technology is used. Reel mower vs. gas-powered rotary. Pencil vs. pixels. Chalkboard vs. IWB.

I'm a retired doc--before I stopped succoring the afflicted I saw the mess high tech mania produced in medicine. Mr. Aungst's example of the CT machine is an interesting example, because of the quandaries it has created, and because of the change in skills that have resulted.

Classic appendicitis (and many subtle variants) can be diagnosed by history and physical exam alone if the practitioner has learned how to do this. CT scans are quite useful in certain situations, but are often superfluous, and can, at times, mislead. They certainly tangle up a few DNA molecules (which are usually repaired), and they are very expensive.

The obvious downsides to CT imaging is that it takes time (and time is an issue with appendicitis), and it requires tossing some radiation through a living critter. Less obvious is the erosion of skills in tech-dependent docs. By the time I left medicine, CT scans were evolving from an overused, nonessential tool to standard of care, partly because the less experienced docs felt no need to refine the clinical skills needed to accurately diagnose appendicitis--because they had CT machines....

High tech has supplanted the low tech history and physical examination--if you delve into the luverly world of Bayesian statistics, you start to grasp why this matters. I loved CT machines--but I used them judiciously. No, you do not need one just because you hit your head. But thanks for asking....

***
"Everything that we can do using digital technology can certainly be done in some other way. As I understand it, technology gives us three capabilities: to do things

  • More efficiently
  • More precisely
  • More thoroughly"

Well, no, and no. Some things done with digital technology cannot be done any other way. I'll save that for another post. The second part, though, intrigues me because it gets a deeper question. Why the hurry?

Given the phenomenal information now (efficiently, precisely, thoroughly) available to all of us, does pedagogy require the same technical sleekness? Do our classrooms need to follow the industrial model of production? Is this even possible? The Slow School movement makes a nice counter-story to the frenzy spawned in Silicon Valley.

If you believe that our current cultural practices have had disastrous effects on our seas, our air, our children, maybe stepping back a bit to reflect on what matters, itself not a particularly efficient activity, then efficiency loses its luster. If we took the time to reflect on our practices, to appreciate the depth of consequences we make with our choices, would the shimmering cognitive dissonance awaken us enough to change? Or would it drive us back into the dull din of relentless data, back to our coffee and wine and the digital distractions of our [dis]connected lives.

 "Why you'll love a Mac. A Mac is as good as it looks."



***
"Technology advances give all of us—doctors, forensic scientists, teachers, and students—the ability to make better decisions...."
This is where our paths divide. "Better decisions" is a huge category--and "better" is as slippery as butter. The large cultural decisions we have made (or have had pressed onto us) the past few generations have had consequences, huge consequences.

Our current air of Western superiority is fueled by cheap calories pumped up from the ground, from finite sources. Our tremendous gains in growing food stem from our ability to fixate nitrogen through the Haber-Bosch process, also dependent on finite sources. We have the time to ruminate, though few of us do.

The same technology that allows us to chat with our "neighbors" half a world away allowed a British "Reaper" un-manned drone to kill civilians in Pakistan using digital communication from an airbase in Nevada. Yes, it was an accident. It wasn't the first time--two children were injured via remote control in 2009. No, it won't be the last.

High tech allows us to make quicker decisions--but if technology makes us capable of better decisions, I'd like to see the evidence.

***

At the end of each school year, I take over a hundred kids to see horseshoe crabs mating along the Sandy Hook Bay. While a few critters may end up frustrated by coitus interruptus sophomoribus, a few humans leave the tide's edge feeling a little bit more connected to the world, and, perhaps, a little bit more in love with the world.

Some of them may end up in Afghanistan, the ones least likely to find it on a map. The Japanese call the horseshoe crab kabuto-gani--"the warrior's helmet"--because of its similarity to the headgear worn by the samurai, a culture that forbid killing by stealth.



We don't dwell on these things, those of us protected by money and class here in the States. They make us uncomfortable.

Teaching science requires some cognitive dissonance, which is convenient, because allowing a child to become more aware of her universe will lead to huge doses of cognitive dissonance. If I aim for efficiency, the children in my class can hide from their dissonance.

Mr. Aungst's article and the subsequent discussion are a wonderful start to why technology matters in the classroom, and who can disagree with his assertion that "educators have accepted responsibility for the growth of the students in their care."

I think we need to discuss what "growth" needs--deeply, slowly, thoroughly, if not efficiently. We'll need some technology--comfortable chairs, maybe a glass or two of something brewed, perhaps a guitar, and artificial light if our chat extends past sunset. We mostly need ourselves and our love for what we do.

Care to join the discussion?





The Mac is from the Apple site.
The pencil is accredited above.
The telson pen is from Horseshoecrab.org.
The horseshoe crab photo is ours.
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Unintended consequences: King Ludd was right

Natural science has a funny way of bumping up against high tech. While we are way past the point of  rationally discussing whether we'd be better off without automobiles, industrialized agriculture, or Auto-Tune (I'd vote against all three), not all high tech gadgets are irreversibly entrenched in our culture.


King Ludd--waiting for rain to wash his hands
 
Hands-free sinks have always annoyed me--I like being able to alter the water temperature, and I have a bad habit of setting my papers down on the sink's edge, with predictable consequences. They make sense, though--less touching, more sanitary. The last thing a hand touches before turning on a bathroom sink may be a less-than-pristine orifice.

Hospitals have spent oodles of dollars installing the sinks for this reason. Nosocomial (hospital-acquired) infections are a huge expense, and despite occasional evidence to the contrary, hospitals want their patients to get better.

Alas, turns out the money may be wasted. A Johns Hopkins study shows that automatic faucets may increase risks of nosocomial infections; the fancy valves used in the high-tech sinks serve as breeding grounds for Legionella bacteria.

As a result, "hospital leadership elected to use traditional fixtures – some 1,080 of them – in all patient care areas in the new clinical buildings currently under construction at Johns Hopkins’ East Baltimore campus." Yep, they're removing the high-tech fancy doo-dad sinks and replacing them with, ahem, traditional fixtures.

How many high-tech devices in the classroom truly improve education? 









Maybe if they look at the morbidity from cars, they'll consider removing the parking lots, too.
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My Google-approved, high-tech, zomgilicious overhead projector

We have interactive whiteboards in our classrooms. They are relatively expensive, and a real pain in the arse if you're left-handed, especially if there's any delay in the projection. (This may not seem obvious, go ask a southpaw...)

The Amish do not have anything in particular against technology, but they do have issues with anything that separates the community. Much of modern technology does just that.

I am not opposed to high tech in the classroom, but I am opposed to tech that is no better than what it replaces, especially if it's more expensive. There are some things I can do with a blackboard that cannot be done with a whiteboard, and the interactive whiteboard, despite its flash, is more restrictive than my whiteboard when I am helping children learn how to think.

On a recent post, I wondered aloud about the use of the word "bitch"--I think it's offensive, many young folk disagree, and a brilliant young adult who happens to work for Google sent me a chat given there by Randall Munroe, the author of xkcd. The talk is fascinating, of course, but even more interesting (to me, anyway) was how Munroe illustrated his work. He used an overhead projector.


It was a fancy camera over an oh-so-cool desktop, but still, it was, in essence, an overhead projector.

I still have an overhead projector, and I still have acetate, but I have not used it, mostly because I cannot hear anything over the fan. I have a camera I use just about every day, projecting various objects on the board as the students wander in to class.

And now I have a Google-approved, high-tech, zomgilicious overhead projector--I simply aim my camera at a piece of paper, and I write. The writing gets projected onto a whiteboard where I can scribble some more. Students can scribble on their own whiteboards, or they can scribble on mine. ("Mine" gets less obvious every day in my class.)





Phenology notes for myself: first ospreys seen diving for fish on Saturday, April 9;
the cormorants are back, the loons have yet to leave.

Randall Munroe screen shot from video cited above.

I still think the word is offensive, so I deleted the original xkcd cartoon 

Sorry, Amanda, I just found your letter--it got stuck in the spam section.
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Clam rake vs. pickle dish

At the end of the day, the hallways are cluttered with abandoned papers. I picked one up.
Quadratic equations, lots of them, scrawled out with the tentativeness of an adolescent's hand.

I'll rake for clams this weekend, fish for striped bass, then bumble in the still chilly garden for a bit.

Which means reading tide charts, currents, and dirt.

I can't tell you how many times I got hit with quadratic equations, electromotive force charts, trig tables, and that freaking pickle jar in Ethan Frome way back in high school.

Then I'd go home and go fishing.

Not saying school wasn't useful--I may still have a decade or two to stumble upon a situation where I might need to decipher broken pickle dishes--but I learned a lot more useful stuff staring at the surf than I ever learned in school.





1:1 computers doesn't change this.
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Mazda Spyder? No, spider!

You mean Mitsubishi Spyder, no?


Um, no, Mazda. Mazda has recalled 65,000 Mazda6's because of concerns that spiders may have crawled into a fuel hose, Cheiracanthium inclusum, the whitish bitey kind we find dropping from the ceiling at midnight, the same kind that terrorized my daughter growing up. While there's some debate how they got in  the cars--a bug expert believes they crawled into the hoses sitting in a Mazda warehouse--Mazda maintains it's "just a mystery."




For the less mechanically minded among us, spiders (or anything besides gasoline) sitting in a fuel line is not good.
***
My sister had a Fiat Spider back when our gang had hair on our heads (and not on our ears). Her fuel line popped off once, and a small fire erupted. I didn't think to check for a spider, but I do remember being amazed at how much it looked like fog.

There's a good reason for that--it is fog. If you burn a hydrocarbon cleanly (with enough oxygen available), you get CO2 and water. White smoke is just water. No one believes this, of course, even if we say we do. Our brains file it under the smoke category, and we get on with life.

2C8H18 + 25O2 -> 16CO2 + 18H20

Unless you teach science to sophomores.
***

I have no idea what a yellow sac spider weighs--maybe a half gram at best? I do know that a  2009 Mazda6i Sport weighs about 3300 pounds empty. Over 100,000 tons of cars have been recalled, waylaid by a spider that already has a reputation for being a nuisance.

Maybe it's the Luddite in me, maybe I'm just getting too cranky seeing us destroy the bigger world around us, but seeing rockets get lost in the Pacific and spiders move mountains of metal have made the news fun again, gentle reminders of our hubris.


The gasoline combustion equation is a bit of a simplification since gasoline is made up of multiple kinds of hydrocarbons. 
I showed octane, which makes up about a fifth of gasoline.

Apparently Mazda cars make the horizon tilt. Flipping through Mazda photos is like visiting the bad guys' lair in a Batman show.
Yellow sac spider photo from Local Pest Control Services
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