Near the bottom

An interesting new theory on “what’s the matter with Kansas”: voters who feel they are near the bottom of the economic pyramid worry that income redistribution will help those who are even worse off (based on a study discussed by The Economist; via daringfireball.)

But this is not really so different than the idea that no one wants to admit (to themselves or anyone) that they’re amongst the worst off in America.

The nuance here is that if you suspect you’re near the bottom, your situation feels the most precarious, because a re-shuffling could easily put you at the bottom. For the middle class, that’s less of a worry. But it’s there. After all, any change to the status quo is scary.

Concerns about math games

Explorations in Math is an interesting Seattle organization that I have been learning about recently. I went to their volunteer training last week and have been discussing my thoughts with family and friends ever since. Those conversations have hugely helped to clarify my concerns. The conclusions deserve to be written down.

This is the draft of a letter to Explorations in Math:

 

What I Like

That’s easy — I fully share your mission to help all elementary students succeed in math. I think this is one of the most important goals there is. You are clearly making a difference and changing attitudes and that is awesome.

 

Concerns

These concerns are largely spurred by books I have read about education psychology. They make me nervous that some aspects of Explorations in Math’s approach could be counterproductive.

 

1. Losing games may perpetuate students’ assumptions that they are bad at math.

Most of the math games have winners and losers. If a student consistently loses the games, doesn’t that reinforce the notion that they are bad at math? Weaker students can be paired with other weaker students so that they do not always lose. But kids know what is going on. They know they are in the “dumb group”. Even if they still enjoy playing the games, do they gain any confidence in their math abilities? One of the success stories that Explorations in Math gives is the observation that kids start playing math games of their own accord while waiting in lines. Are all of the kids playing? Or only the ones who consistently win?

 

2. Sugar-coating may perpetuate the idea that real math is hard and boring.

I don’t doubt that games are a good way to teach and learn some math concepts. But I worry that it sends the underlying message that math needs to be sugar-coated in order to be fun. After all, we don’t need to resort to games to teach reading. Instead, we give students reading materials of increasing difficulty level, with content that is interesting to them, and help them progress. We can do the same in math with well-designed curricula, teaching students how to solve math problems on topics that interest them, at gradually increasing levels of difficulty as they master each concept.

 

3. Arithmetic is one of the least interesting parts of math.

Most of the math games center around mental math and memorizing multiplication tables. These are important building blocks. But the really interesting aspect of math is the ability to answer a wide range of questions with just a few simple tools (such as fractions and algebra). Mental math helps students understand these tools by allowing them to solve problems quickly, without a calculator. But in the real world, we use calculators and computers to do the calculations, and the important skill is being able to translate everyday problems into math problems. The further you progress in math, the more uncommon it is to see actual numbers. Instead, you work to understand abstractions and learn how to model the world and make precise predictions.

 

4. I don’t see any hard evidence of results.

The Explorations in Math website includes great testimonials and anecdotes. But have math test scores improved in the schools you have worked with? In particular, have scores gone up among disadvantaged and historically weaker students? I’m as disillusioned with “teaching to the test” as anyone, but the tests do measure students’ math ability. If you are improving attitudes but having no effect on test scores, what has really been accomplished? The recent documentary Waiting for Superman points out that American students score among the lowest of developed countries in math scores, but score higher than anyone in confidence. Confidence is only useful if it is backed by reality.

 

It may be that the real problem is that all of our hands are tied by the school board’s mandated, poor choices of math curricula. Is Explorations in Math designed to be a side-run around that very stubborn obstacle? Is it designed as the best approach given the constraints?

Another good question

As a teacher, you are in the business of helping our children learn, grow and change. If you are not also willing to learn, grow, and change, then what reason do we have to believe that you will be a good teacher?

Fundamentalist

“I was on the side of righteousness, and like any fundamentalist, I could only stay there by avoiding information.”

-Lierre Keith, The Vegetarian Myth

Wikipedia trivia

“Wikipedia trivia: if you take any article, click on the first link in the article text not in parentheses or italics, and then repeat, you will eventually end up at ‘Philosophy’.”

xkcd

It’s true. I tried it. I couldn’t resist.

Technological transitions lead to income inequality

“After a great technological revolution or a major economic transition, as when America changed from a nation of farmers to an urban industrial one, there is often a period of great concentration of wealth, and with it, a concentration of power in the wealthy. That’s what we saw in 1928, and that’s what we see today. At some point that power is exercised so injudiciously, and the lives of so many become so unbearable, that a period of reform ensues.”

“[There is no reform when] it is not public opinion but the opinions of the wealthy that predict the votes of the Senate.”

-Drew Westen, What Happened to Obama? (NYTimes, Aug 6, 2011)

Technobabble

From one of the most important slides I’ve seen on computer security:

“Security dialogs are a black box; clicking Permit or Allow maximizes the likelihood of getting work done.”

From WWDC ’11, session 203, 10:47, by Ivan Krstic.

Price discrimination of health food

A basic tenet of economics is that some customers are willing to pay more than others for a given product. So it’s in any company’s best interest to charge more to customers who are willing to pay more. This practice, called “price discrimination,” is illegal in its most basic form. But it is commonly practiced in many more subtle ways. One example is coupons: customers willing to find and cut out coupons tend to be willing to pay less than customers that don’t want to spend time finding the coupons.

Another prevalent example of price discrimination is first-class vs. coach-class seating on trains and planes. People willing to pay a lot of money for a plane ticket will buy a first-class seat if the experience is significantly better than in coach. I remember reading in Econ 101 that many train companies purposefully degraded the experience in coach class so that anyone who could afford first class would pay the premium. Fortunately, this trick doesn’t work well in a highly competitive marketplace because other providers can win over the low-paying customers by providing them a better coach class experience.

I’ve started to think that the same principle applies to health food. People who want organic, pesticide-free, low-calorie, whole-grain food tend to be people lucky enough to have the luxury to think about such things. In other words, they tend to be richer and have more money to spend on food. Conversely, people who have just barely enough money to get by are more interested in getting the most calories per dollar so they can eat a satisfying meal without breaking the bank. In other words, restaurants and grocery stores know they can get away with selling health foods at a premium, because they know the people most interested in those products are willing to pay more.

I think this explains why healthy food often costs so much more than junk food even when it doesn’t actually cost more to produce. Williams College, which is big enough to purchase directly from food producers, saved money by using more local, organic dining hall food.

Job satisfaction findings from last century

Bill Buxton, in a presentation at CHI 2011, recommended the work of Melvin Kransberg, a pioneering historian of technology. Kransberg apparently published the definitive textbook on the subject, but that is many pages and several volumes long; instead, I read By the Sweat of Thy Brow (1975) by Kransberg and Joseph Gies.

It is worthwhile to read a decades-old book now and then to remind yourself that many of the important problems of today were also problems of the past. What’s most astonishing is how many solutions exist that were proven decades ago, yet are still not widely known, let alone widely implemented.

I found the most interesting examples of this in By the Sweat of Thy Brow to be the solutions for job satisfaction. I leave you with a series of quotes.

…the classic (1932) British motivational study of girl workers threading embroidery needles…. The girls were told first that they had to thread a hundred dozen needles a day instead of the seventy-five dozen they had been threading. The announcement produced consternation that turned into delight when it was added that on finishing the hundred dozen they could go home. They got through the new quota in time to leave at 2:30 in the afternoon.

At [a Bell Telephone Company plant], phone directories were formerly compiled by women employees each of whom performed only one of the 17 operations necessary in compiling a directory…. Management found itself endlessly hiring and training new workers. Under the job enrichment ideology, each worker was given an entire directory to compile, performing all 17 steps, from scheduling to proofreading. Turnover dropped substantially.

  •

Frederick Herzberg, a prominent industrial psychologist, has identified [in 1966] five factors as strong determinants of job satisfaction—achievement, recognition, work itself, responsibility, and advancement…

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‘Perhaps the most consistent complaint reported to our task force,’ said the Work in America study, ‘has been the failure of bosses to listen to workers who wish to propose better ways of doing their jobs.’

What motivates a child?

That seems like a simple enough question.  If you asked a selection of teachers, parents, and psychologists to answer it, I wonder how their answers would differ from each other.  Is it a solved problem? Or a complex mystery on the frontier of science? Or somewhere in between?