Dishonesty By The Numbers….

Several years ago, I almost got into a fistfight with a friend while attending a speech by Malcolm Gladwell at the NCTM annual conference in Salt Lake City. What began this near melee was Gladwell’s assertion that Pablo Picasso’s innovations somehow “peaked” in his youth, while Cezanne was the example of someone who gradually refined his work until it achieved the excellence it was remembered for. I took exception to this assertion, mostly because the description of Picasso’s career is completely untrue: Picasso’s work was innovational through the many decades that he worked, and he continued to innovate up to the end of his life. The narrative Gladwell had created was based on the auction value of each artist’s works: apparently, early Picassos were more value than later ones, therefore his work early in his career was more innovative.

Unfortunately, this correlation that Gladwell created was a complete crock: the value of an artist’s work is based on a lot of complex variables, including the availability of the pieces from that period (I wouldn’t be surprised to find that PIcasso’s early work is scarcer than his later work), the buyers’ tastes (believe it or not, different styles of art go in and out of fashion like everything else, affecting their auction prices) and, last on the list, whether it was an example of the artist “at his best.” Clearly, Gladwell was out of his depth when it came to valuing artwork. If the facts don’t fit your story, don’t change the story; alter the facts.

Of course, this kind of irresponsibility is rampant among journalists of all stripes; our latest example is by Annie Murphy Paul, who has written yet another book on learning called “Brilliance: The Science of Smart.” I’m not going to criticize something I have not (and will not) read, but I did see Paul’s (or is it Murphy Paul?) latest column on the Time website to know that when something looks and smells like BS, it most likely is. Let’s read one of her choice quotes:

“Indeed, many experts who have observed the wide gap between the math scores of American and Chinese students on international tests attribute the Asian students’ advantage to their  school’s relentless focus on memorizing math facts. Failure to do so can effectively close off the higher realms of mathematics: A study published in the journal Math Cognition found that most errors made by students working on complex math problems were due to a lack of automaticity in basic math facts.”

Where to begin? How about with the relentless use of the word “many,” which is used “many” times. “Many experts” are cited in the opening sentence – well, how many is it? Who are these “experts?” Did these “experts” really lay all the blame on the differences between Chinese and American students’ achievement in mathematics on math facts? And why is there no link to the article in Math Cognition, a journal which even I, a class A nerd of all nerds, has never heard of? Perhaps because the study was from, wait for it, 1999? Maybe it was the fact that the students were not actually working on complex math problems at all, but multi-digit addition problems? Maybe because the study looked at 3rd through 6th grade, and made no mention of how their data compared to Chinese students? This is a clear cut case of cherry picking data to fit a narrative. How Time allowed Murphy Paul to publish this packet of prevaricated nonsense is a mystery to me.

The “Flipped Classroom” takes on THE REAL WORLD

There seems to be no shortage of “expert” advice when it comes to the “flipped classroom,” (which you can read about here, here and here) and as I read the enduring hoopola about classrooms that are adopting this style of learning, it gets me to dreaming: in what kind of alternate universe would this work? If you consider that one of the most visible proponents of  this ideology is the one and only Sal Khan, who makes his home in an upscale locale called Mountain View, California, then you’ll quickly figure out who stands to benefit the most from this type of “instruction.” Many of us, however, are not fortunate to live in a community where the median family income is over $100,000. (which makes it double the median family income in the United States, by the way) putting Khan in an entirely different universe from the one in which many of us live. Many teachers working in urban school districts are attempting to make things work in communities where resources are less generously distributed, which is better known as “THE REAL WORLD.” This world bears little relation to the ones modeled in the “flipped classroom.” So let’s pause for a moment and consider the world of those who advocate the “flipped classroom,” and compare/contrast it with THE REAL WORLD.

In the fantasy world of the flipped classroom, the student attends a school where s/he can drop into the school’s computer lab anytime s/he likes, so that s/he can watch the video lecture whenever s/he likes, either before school, after school or even in the 10 minute break before the class is scheduled to start. If s/he is involved in an afterschool athletics, arts or academic program, s/he will usually head  to a comfortable homes where, with some gentle prodding, s/he will fire up the latest model computer with a high speed internet connection and settle down in a quiet and private space to watch the 15 minute video on adding and subtracting fractions.

The student in this alternate universe pays rapt attention to the lecture, takes copious notes, and replays the parts which are difficult, unclear, or inaccurate (all of which are very likely.) The student arrives at the classroom where the teacher, who has ample supplies, plenty of  professional support, and a beautiful, sun drenched classroom, will engage the students in an engaging, properly differentiated problem solving activity based on the video that all the students viewed and eagerly digested before they came to class. Sounds pretty ideal, right?

In “THE REAL WORLD,” there is a computer lab, but it is not available during the day because the school is overcrowded and it gets used every period of the day. The student goes to an afterschool program which is in a crowded cafeteria that has no internet available, which is not a problem, because nobody has a laptop or tablet anyway. If somone did, it would be so old that it could not play the videos, or the internet speed would be so slow that it could not show the video all the way through. Perhaps the student attempts to view the video on a smartphone, but the screen is so small and the sound so bad that s/he can’t make out what is going on. There is a teacher available to help the student with his/her homework, but since that homework involves watching and taking notes on a video that can’t be viewed, the teacher is of no help.

In THE REAL WORLD, the child comes home to a small apartment where there is a single computer shared by the entire family. After waiting for his/her turn (because his/her siblings are also in “flipped classrooms,”), the student sits down to watch the video, but there are many other competing distractions once the computer is turned on: s/he checks his/her Facebook page, then uploads a  few Instagram photos, reads the last 50 tweets from a favorite celebrity, and don’t forget the 100,000,000 videos that are available on YouTube, 999,999,999 of which are far more entertaining than the one on fractions.

In THE REAL WORLD the student rushes through the video, but barely makes out what is going on because there is music blasting from the other side of the room. S/he watches it once, and then returns his/her attention to more important things, like playing video games. All this is moot if the student is not fully English proficient, because although the video may be viewable in Spanish, it is in an incomprehensible dialect the student can’t understand.

In THE REAL WORLD the student rushes to school on a train or bus, where all memories of last night’s video fades into the background. His/her teacher asks how many students watched the video the previous evening, and 8 kids out of the 35  have seen it; of those 8, perhaps 2 can recall in detail what it was about.

In THE REAL WORLD, the teacher, who is most likely not trained to teach mathematics, struggles to replicate the lesson on the video, since 90% of the class is unprepared, but the kids who watched it at home are bored, and the kids who didn’t watch it are also bored, because lectures, especially those about fractions are, well, boring!

In THE REAL WORLD, the teacher realizes that the notion of “flipping the classroom” is only doable in some alternate universe that one sees in textbooks and on half-hour sitcoms; the only point of intersection between THE REAL WORLD and that of the “flipped classroom” is that it involves children and learning, but little else. After 10 years of classroom experience, the teacher knows full well that s/he has absolutely no control over what takes place beyond the 40 minutes the student spends in the class each day.

When I ponder the notion of “Flipping the Classroom,” it reeks of so many other “inovations” which on the face of it, appear to be logical and seamless. The reality is that, like many other initiatives of this type, it can only succeed in some kind of strangely homogenous universe which bears little relation to reality, a universe which appears to be primarily suburban and most definitely middle to upper class. To be honest, anything done with these student populations to improve the quality of  learning would increase their test scores, because the variables are so easy to control.

In THE REAL WORLD, things are very different, and it’s not because the kids who inhabit THE REAL WORLD are any less capable. Those of us who have worked in this world know and understand that solving the challenges these students face will require a lot more innovation than assigning a YouTube video for homework. If the experts really thought they were changing the nature of education, they would start by figuring out how to make a “flipped classroom” work for those students who spend their time living in THE REAL WORLD. Until that time, it’s just something that happens ELSEWHERE.

Teaching as an act of Intimacy

I love visiting classrooms as part of my work as a teacher coach and curriculum designer, and one of the great perks is sitting down with students and asking questions while they are working on an assignment. Today was one such day: I was observing a 5th grade class where the teacher was concluding a unit on statistics, and the students were busy making corrections on a quiz they had taken the previous day.

I placed myself next to Julian, a young man whom I had watched for the previous 2 years while he was in the 3rd and 4th grade. Julian tended towards distraction, and on many occasion when I saw him drifting off into free flight, I would tap him on the shoulder as I strolled by, turn towards him and use the Robert DeNiro “I’ve got my eyes on you” signal from “Meet the Parents.” Julian smiled each time I used this little trope, and it became part of our bond.

I looked over Julian’s quiz, made some suggestions for corrections, and then asked him a few questions about the meaning of mean, median, range and mode. My questions moved into the hypothetical “meta” realm, where I asked things like “what if I only knew the median for this data; what would I know? What wouldn’t I know? We chatted for about 15 minutes, during which time I developed a new lesson idea: suppose you had the statistical information about 5 people, including the mean, mode, range and median. What kind of data could you assign to each person to get this set of statistics? Could someone create a completely different set of data which would yield the same set of statistics?

As I stumbled out of school at the end of the day, I was stopped by Julian’s mother. “I just wanted to thank you for the time you spent with Julian today,” she said, “he really appreciated the time you took to explain things to him.” I told her the truth, which was that I hadn’t “explained” much of anything, and that we were just having a little conversation. Nonetheless, she thanked me again.

All of which got me thinking: what makes “teaching” teaching? In between checking the homework, explaining the assignments, creating and grading the exams and all the other elements of teaching mathematics, what it all comes down to is those moments of intellectual intimacy, when two minds co-mingle and understanding emerges.

I don’t know if Singapore Math is any more “effective” than TERC or Chicago Math. I have my doubts that Khan Academy is going to have any staying power, and I am not yet convinced that technology will make kids any better at mathematics. What I do know is that the 5,000 years of history has shown that the most effective form of teaching takes place when someone taking an interest in a child, a conversation takes place, and eventually, understanding develops. It is the intellectual version of the “I and Thou” relationship about which Martin Buber has written. It is what we have all experienced at one time or another, and even though I am not a strong believer in the existence of a supreme being, when those moments take place, God is in the house.

An Old Dog Learns a New Trick…

As followers of my blog know, I’ve been working on better ways to teach math for almost 30 years, and just when I think I’ve seen everything, someone has to come along and show me a different approach. It’s rather humbling, but I guess I can take some credit, because as Picasso once opined “good artists borrow; great artists steal…”

For some (many) years I’ve worked with children on creating number patterns using the hundreds chart, usually in the form of  skip counting, which reveal all kinds of interesting vertical and diagonal lines, plus the “knights move” (2 down and over 1, or some combination thereof), which leads into all kinds of fascinating discussions on classifying and grouping skip counting patterns. The results don’t look a lot different year after year:

This morning I happened to stop by the classroom of our 3rd grade teacher who goes by the name Nancy S., and as we were exchanging our Rosh Hashanah greetings, she showed me an activity where she took this concept and turned it on its head: instead of starting with a “rule” (like skip counting by 3s shown above), why not have the children create a visual pattern of their own, and then describe one another’s “rule.”

Here are some of the examples:

Below each of the patterns is a small piece of paper with a few sentences in which a student who didn’t create the visual pattern writes his/her hypothesis of what the originator was thinking when he/she created this number pattern.

Suffice to say, this activity fits into so many of the ways I like to think about what an exemplary math activity is about: it takes a small idea (that number patterns can be visualized on a hundreds chart) and turns it on its head. Implicit in this activity is the idea that mathematics is about communicating through different modes: we start out with a visual representation that may be purely visual (that is, the student decides to fill in an entire column or diagonal row of numbers), or may follow a rule (“fill in all the numbers where the ones and tens adds up to 9″) and then leaves it to another person to decipher what he/she was doing. It’s a neat application of the “what’s my rule” activity where students  look at a series of relationships between numbers (“3 in, 4 out; 4 in, 5 out, 6 in, 7 out; what’s my rule?”) but this time they are looking at visual relationships and then by decoding the numbers, they can turn it into a verbal relationships.

What also resonates for me is the current research that looks into mathematics achievement and relational thinking; that is, there is considerable evidence that facility with numbers comes from the ability to develop narrative facility, particularly when it comes to switching perspective between different characters in a story. If we extrapolate this idea, then developing mathematical thinking comes from continually switching perspective between not only characters in a story, but problems that have been posed to you. That is, we refine our mathematical thinking both by posing problems to others, and by attempting to interpret the problems that have been posed to us. This is best facilitated by removing the teacher from the equation, and working “peer to peer,” because when children are attempting to communicate ideas to other children, they will take on the perspective of another child, rather than communicating “this is what the teacher wants.”

Where to go from here? Well, I couldn’t help but get into the act, being the devil I am: I printed up my own hundreds chart (which you’ll notice counts “up” instead of “down”) and filled in a pattern and sent it over to Nancy’s class. What’s going on in my mind?

Barbie was right: Math is hard!

As my loyal readers have probably caught on to by now, I am a die-hard skeptic of any curriculum that seeks to make math “fun and easy.” Actually, I have no problem with the fun part (although it is debatable what constitutes “fun” in mathematics, especially to a 13 year old), but anyone whose intention is to make math “easy” is beneath my contempt. By its very nature, mathematics is difficult and  frustrating, and anybody, ANYBODY who attempts to convince me otherwise is probably not actually doing or teaching mathematics.

Let’s look at just a few things that makes mathematics fundamentally annoying:

Ambiguity and Inconsistency: Those who are ignorant of mathematics claim that mathematics is inherently consistent and rule driven. These are the same people who claim to have an inability to fathom mathematics because they consider themselves “creative,” “people oriented” and “rule breakers.”  Mathematics is, however, by its very nature ambiguous, and it has a long history of creative minds that piled on idea after idea to construct this towering edifice of inconsistency and seemingly improbable ideas (really, there is a square root of -12? Are you kidding me?)  These ambiguities and inconsistencies surface over and over again in the field of mathematics, and anybody who isn’t willing to admit to and confront them is doomed to failure.

Lack of Precision: Yes, there is only a single correct answer to the problem 8 x 7 (according to a story by Robert Kaplan, it is not 53 or 57.) However, 8 x 7 is not mathematics, but its important  and superficial sibling known as “arithmetic.” A real mathematics problem asks us to consider whether there are more points between 0 and 1 or -? and +? on the number line (they’re actually the same, but that’s another matter.) Furthermore, much of the actual mathematics we use is probabilistic, whether it is involves predicting the value of my IRA when I retire to determining what the number of number of hours I’ll need to master the bassoon part on Ravel’s Bolero. Mathematics is not infuriating because it is so precise; rather, it offers up precision where none is available, and even when invoked, its precision can be startlingly imprecise.

Unclear and Inconsistent Methodology: Yes, there are standard algorithms for computing everything from the quotient of two multi-digit numbers (better known as “long division”) to calculating the sum of an infinite series. But this does not fall into the purview of actual mathematics; it is merely an advanced form of arithmetic. True mathematics involves interpreting or inventing procedures that apply not only to particular cases, but also varying those procedures so that they can be streamlined or made “elegant.” There is no “correct” way to perform “long division;” however, there are some ways that are more efficient, transparent and elegant.

Many years ago there was an outcry over a talking Barbie doll which, among her repertoire of mindless statements, rendered an opinion that “Algebra is hard!” Lost in the outcry over of a polystyrene doll uttering such a remark was the actual veracity of her statement. Algebra is hard, and so is much of real mathematics. Let’s just admit it and move on. Let’s remember, however, that just because something is hard, doesn’t mean it isn’t worth doing.

Mü-Math: The Mobile Unit to Promote Mathematical Thinking

As many of you may (or may not) know, I have an exhibit on Governors Island in New York Harbor that will be on view until the end of September. For those of you not familiar with Governors Island, it was originally the home of the governor of NY when it was still a colony; in its 200+ year history it has been an army base, jail for Confederate soldiers and, from 1966 – 96, a Coast Guard base that housed approximately 3,500 soldiers and their families. Now under the ownership of the City of New York, it has become a multi-purpose space for arts and recreation.

In January, I applied to the Trust for Governors Island to obtain a space to install my exhibit, Mü-Math: The Mobile Unit to Promote Mathematical Thinking on Governors Island from Memorial Day to September 30th, when Governors Island will be closed to the public until the following spring. The exhibit is housed in a building that used to be apartment housing for soldiers with families: by New York City standards it is quite spacious, with two bedrooms, a large kitchen and living room.

The exhibit has about 10 different activities which are notable in that they are more like puzzles than the math you would find in a textbook, yet each is linked to powerful ideas about the nature of mathematical thinking. For example,the idea of algebra as pattern detection, interpolation and extrapolation is conveyed using a set of subway cars that show a number progression. Each week I try to add a new activity to spice things up; the latest idea, “Align the Avenues,” actually came from a visitor who presented me with a puzzle where the numbers 1 – 8 had to be put into a grid so that no two consecutive numbers would touch on the top, bottom, sides, or diagonals. I re-cast the numbers as “avenues” and turned the grid into the “Welcome to ______” road signs that greet drivers on our various highways and bridges, so that it now looks like this:

 Unfortunately, as I write this, I realize that the directions don’t specify the sides as well, but that can easily be corrected in the final version. Yes, I know the “solution” on the right is incorrect, but if you do decide to solve this on your own, please look at the solution carefully. There is real elegance to where certain numbers are placed, and it begins by thinking about which numbers have the fewest “neighbors” and how that should influence their placement. The solution also has an interesting train of logic that one must follow, because one “clue” leads to another, which leads to another, which finally solves the puzzle. As in any great puzzle, there are multiple solutions, but they all follow the same kind of internal logic.

Of course, if you’re hosting an exhibit on mathematics and problem solving which incorporates puzzles, you’re going to attract a certain number of “wise guys.” Here’s one that a character sprang on me (and a roomful of visitors) a few weeks back. He claimed to have invented it and uses it as a “test” to figure out whether one has the skills to be a leader. I flunked it with flying colors, so maybe my future is limited to being a self-described cognitive artist.

What, No Algebra?

Why does it take a former political science professor to tell us what is patently obvious in the field of mathematics education? Andrew Hacker, a professor emeritus at Queens College and co-author of the “Higher Education? How Colleges Are Wasting Our Money and Failing Our Kids — and What We Can Do About It,” tells us in a front page article in the Sunday New York Times that we should jettison our current high school math sequence in its entirety. In an article entitled “Is Algebra Necessary?” Hacker argues that forcing all students to march lockstep through the algebra – geometry – trigonometry tunnel is a waste of time and results in many students leaving school dispirited and disinterested. To me this is not a terribly daring position, and anybody who would disagree with Hacker’s proposition probably belongs to the faction that believes that “tradition” consists of subjecting our children to the same mind-numbing educational system that we and our elders suffered through because “it was good enough for us, so it must be good enough for them.” Judging from the negative responses, you might have thought that Hacker was demanding the downfall of the Occident, for the consensus seemed to be that we should fix things by getting better teachers (or better students, as I often quip.) I myself have taught algebra for many years, and even though I attempted to make a go of it, I can only agree with his assessment.

To begin at the beginning, let’s answer Hacker’s question, “Is Algebra Necessary?” with another question: “Is Cubism necessary? Are Shakespearean sonnets necessary? Is avant garde jazz necessary?” No, Virginia, none of these are necessary, and when it comes right down to it, neither is algebra. But that doesn’t mean any of them are irrelevant or unimportant.

But before I begin arguing the point, I think it is necessary to distinguish between “algebra” the noun, and “algebra” the verb. Algebra the noun consists of the symbols written down in textbooks, is riddled with lots of Xs and Ys (I once considered applying for the right to copyright the use of X and Y in algebra texts, in the hope I would get rich by receiving 1/100th cent for every time either one appeared), and involves lots of “rules” that came down from some central authority, the most egregious of which is “FOIL.” This is the “algebra” that Hacker describes and that the majority of us who have attempted to learn and teach now decry.

If we understand “algebra” as a verb, then it could be very useful to most people. Algebra the verb, which I’ll refer to heretofore as “algebraic thinking,” represents a non-inconsequential step in human understanding. For what is algebraic thinking but the transition away from “case based” arithmetic, and into a generalized form which can be applied to any instance? Algebraic reasoning allows us to do such things as identify patterns and relationships (which can be compressed using symbols, but I’ll leave that to the textbook writers) that can be applied to a variety of situations.

For example, arithmetic tells me if I purchase 5 pounds of bananas for 60¢ per pound, I know the total price will come out to be $3.00. Algebraic thinking, on the other hand, tells me that if I multiply the number of items by the price per item, I will always get the total price, regardless of whether the items are bananas, magic beans or credit default swaps. The power of algebraic thinking is that I don’t have to go through the trouble of developing a new method each time I want to solve a certain type of problem: much like the venerable Swiss Army Knife, one tool, better known as an algebraic equation, can handle it all.

Algebraic thinking also gives me access to tools that can help understand the past, present and/or future through the use of patterns that can be recorded and generalized. For example, if I found myself afloat in a leaky rowboat and noticed that the water was rising at the rate of 2” every hour, it is safe to assume that after 8 hours, my boat will have taken on 16” of water, which could be especially disturbing if the boat is, in fact, only 12” deep. Algebraic thinking gives me the power to work out a variety of scenarios: if my boat has already taken on 10” of water, I might want to consider bailing very quickly, while if it was only at the 3” level, I would have a bit of time to play a few hands of Solitaire before taking action.

Finally, having access to algebraic thinking puts me in better control of my life and can directly influence how I make daily decisions. As I write this, I am sitting on line with 300 other people to see “Shakespeare in the Park,” an annual ritual which involves queuing up at 8 am to wait until tickets are distributed some 5 hours later. By my last count, there are 300 people in line ahead of me, some, but not all of who will get 2 tickets apiece. The theatre holds about 1800 people and I just learned that 500 of those tickets are going to be distributed to residents of Brooklyn. Using algebraic thinking, I can put together a reasonable prediction that staying on line for the next 2 hours would be a reasonable course of action. (As it happened, I did end up getting a voucher which would entitle me to get two tickets shortly before the show begins; what time I should arrive to do this is yet another algebraic problem.)

So what are we to make of Hackman and his call to eliminate algebra the noun from the high school curriculum? Of course, some of Heckman’s assertions are debatable; when he cites that “most of the educators I’ve talked with cite algebra as the major academic reason” for students dropping out of high school, he is clearly confounding personal anecdote with actual data. On the other hand, as one of those teachers who has himself observed students suffer through factoring polynomials without an actual explanation of why this may be relevant to anything they might pursue later in life, I’ve come up with bupkis over and over again. To this I would wish a fond farewell to algebra the noun: nobody is likely to miss you.

 

Why Bill Gates Loves Sal Khan….

If you’ve been reading all the hoopla and criticisms of Khan Academy, you’ll know that Bill Gates referred to Khan as “the best teacher he’s ever seen.” This quote can be interpreted a couple of ways. Perhaps, it is a “dis” on the teaching he experienced at the prestigious Lakeside School in Seattle as a teenager. At the same time, we should remember that Gates did drop out of Harvard during his sophomore year, so perhaps he was not working with a very large sample size. In my view, Gates’ admiration for Khan can be understood by understanding their similarities.

  • The Hobbyist As Professional: Both Gates and Khan started out as amateurs who were hacking around in their respective fields. When Gates started out playing with a computer bought by funds from his private school’s “Mothers Club,” he had little idea that this might turn into a profession, and to this day, almost all his knowledge is self-taught. Similarly, Sal Kahn never imagined his videos would become a worldwide phenomena; his understanding of teaching is based on his own experiences, with almost no attention paid to what is going on in the actual profession of education.
  • Quantity, Quantity, Quantity: As any user of Microsoft’s products knows, Gates’ products have a tendency to skew towards the side of “feature bloat.” That is, a word processor is more than just a word processor: the current version of Word does everything from twisting type in all sorts of amateurish ways to reprogramming your toaster oven to poach an egg (okay, maybe not….) Similarly, Khan Academy offers over 3,000 videos which cover everything from how to multiply positive and negative numbers to the causes of the French Revolution. This is reminiscent of the Woody Allen joke about two Jewish women discussing the food at their Catskill resort: “Oh, the food here is so bad…” “Yes, and the portions are so small!” Sure, Word is a terrible word processor, and Khan Academy is boring and full of errors: but look at how much you get for your money!
  • Lack of Elegance: The most prominent feature that both Gates and Khan share is the utter lack of interest in any kind of design appeal in their respective products. Anybody who has worked with both Windows and Macintosh agree that there is no comparison: Apple pays almost manic attention to even the finest details of the interface, from the fonts used in the file names to the organization of its icons. Windows, by comparison, is a melange of garish colors and hideous fonts that does nothing more than reinforce the notion that computer programmers are immune to something known as “esthetics.” Khan’s videos make Windows look like the work of the Frank Lloyd Wright: the narration is halting, filled with “ums” and “ahs,” which disrupt the coherence of thought. His handwriting is barely legible, and what he writes is often disorganized and incoherent. Nobody will ever confuse a Khan lesson with the one that was crafted especially for him at this 2011 TED presentation.
  • Lack of Originality: We all know that Gates’s flagship product, Windows, was a blatant ripoff of Apple’s Macintosh operating system ( and whether Apples GUI was original is a subject of dispute, but let’s not get into that.) Khan is in the same boat: he is not the first to put lessons on the web; ever since the debut of YouTube, anybody with a video camera and an internet connection has been able to put up a “how to” video on the web, whether it is tuning a bassoon to brushing your dog’s teeth. There is nothing “innovative” about what Khan has done; Marc Chagall was innovative, and Sal Khan is no Marc Chagall.
  • Reliance on Brute Force: In the same way that Windows become the dominant operating system by loading it onto any computer which had a hard drive capacious enough to withstand the bloat, so has Khan become the leader in online education by creating thousands of low-quality videos on things about which he has not much more than a glancing knowledge. Khan has triumphed by taking meaty subjects like mathematics and chopping up into tasteless nuggets that are easy to eat but ultimately have no intellectually nutritive value.
  • Reinforcing Stale Paradigms: Both Gates and Khan share the distinction of reinforcers of current paradigms. Gates’ business model forced users to buy into his vision of what computing should be; that is, it came from a centralized power who called the shots about how a computer should look and feel. Khan also buys into an old paradigm, one of teaching as emanating from a central authority: his videos tell you what to think and do, without demanding that you actually question why things are the way they are. This critique of Khan’s lesson on multiplying and dividing positive and negative numbers is a devastating dissection of Khan’s tired old methodology.

In summary, it’s not hard to see why Bill Gates and Sal Khan are a match made in heaven; with Microsoft quietly slipping into irrelevance after 25 years, people who have actual concerns about the state of education in the United States can only hope that the Khan Academy fad will have a much shorter half-life. Of course, it will then be time for yet another educational fad.

“You’re too young to be bad at this….”

A teacher asked me to bring pentominoes to her class, for they were reading a book that involved a character who walked around with pentominoes in his pocket. As one of the students was working on arranging the 12 pentominoes into the shape of a rectangle, he sighed under his breath and commented, “man, I really stink at this….”

Whenever students tell me they are not good at something, I immediately remind them that while a lot of mathematics is tricky and challenging, it can also be mastered through practice. This has led me to change my language: I never tell them they don’t understand something; it is always, “you don’t understand this yet.” I find the power of “yet” to be immediate and optimistic: it conveys the idea that they will eventually understand, and just because it is not immediate does not mean it will never arrive.

To this student, I replied, “You just started working on this like, what, 5 minutes ago? How can you tell whether you’re no good at this?”

The student shook his shoulders, and his frustration continued.

“I am really no good at this!” he complained.

“You can’t tell yet whether you’re not good at this. Give it a lot more time.”

“How long?”

“Well, to really know if you’re not good at something takes a long time. Usually 10 or 20 years…”

“What? How can that be?”

“Because, the real test of whether you’re no good at something is to work at it for years and years and to see no improvement. That’s the only way to know that you’re no good at something.”

“So…?”

“Basically, you’re too young to stink at something. You’ll need to spend a lot more time on this to really know if you’re no good at it.”

Math, Art, West Coast: Brilliant!

During my travels, I love to take in the local art scene (no matter if it isn’t quite local….) Many people ask why art, if my work is in mathematics. Well, the truth is that before I was in mathematics, I was in visual arts: I was trained as a calligrapher, studied photography, printmaking, filmmaking, industrial arts and, to round it all out, mechanical drawing and architecture. With this kind of background, I developed all kinds of mathematical expertise, including an intuitive understanding of ratio and proportion from mixing chemicals in my darkroom and enlarging photos. I learned to measure precisely as well as how to work in scale through my years of mechanical drawing and architecture, and developed an eye for expressing mathematical relationships through my work in graphic design.

Here’s one of the examples of “art & math” I saw during my travels:

Where's the art?

This is a piece by Bonnie Bronson entitled JAS #1. it’s a trio of metal plates attached to the wall. To me, it is a intricate juxtaposition of shape and space, which is what a lot of these artists are dong in their work.

Here are a few things I want to point out as you look at this:

  • Where do you “begin” looking at this? Does it “read” from right to left, left to right, front to back or back to front? Should we look a the largest object first and then move to the smaller ones?
  • Is there a predominant “shape?” How do the shapes “fit” together? They all seem to share a common height (the trapezoid in the front may be taller, or is that a trick of perspective?), and the back trapezoid seems to be the same as the one in the front, save it has been “complete” on the right side. Or is the smaller trapezoid a truncated version of the one in the back?
  • The rhombus which separates the two shapes does so in many ways: besides separating them by space horizontally, it also creates a layer between them. Why is Kelly keeping the two related shapes away from one another?
  • The smaller trapezoid has another function, besides being a part of the larger one; it also splits up the rhombus behind it, yet also completes it as rough approximation of the trapezoid that is on the end. What kinds of tricks is Kelly playing with us? And what about that trapezoid on the viewer’s right: it is partially obstructed by that rhombus. Is the rest of it there, or not? We assume these shapes are “filled,” but are they really?

So, what do you think? Is it just a couple of plates screwed into the wall, or is there really an “art” behind that “art?”