Showing posts with label constructivist math. Show all posts
Showing posts with label constructivist math. Show all posts

Monday, June 4, 2007

Today’s 4th Grade Everyday Mathematics “chapter review”

This final unit (Chapter 12) has the students learning about rates: dollars per hour, miles per hour, and calories per serving, for example. Understanding them will certainly be of value as consumers. Sounds practical, and in theory I have no argument with that.

Having said that, the questions on the review (and this week’s homework) point out yet another thing that drives me crazy (in a bad way) about EM:

1) The correct answer requires a written explanation of at least a couple of sentences when a simple numerical equation could have clearly demonstrated understanding or lack thereof. Half the problems on this chapter review ended with “explain,” “explain your strategy,” “explain your answer.”
2) Some of the “word problems” (generous description) require multiplication using decimals. This isn’t a problem per se and especially important when we’re talking about money, right? However, in fourth grade Everyday Mathematics, students are only taught to multiply decimals using a calculator. In fact, a quick search of the index of the Student Reference Book (4th Grade) would provide you with three entries (p. 37, 161, 180) and every single one involves using a calculator to multiply decimals. Don’t even bother looking up division of decimals because it’s not even in the index at all. Yes, really!
3) Some of the questions are so subjective that the possibility of answers is not limited to one that would teach the lesson of rates, but could be virtually unlimited if you take into account the author’s explanation. In the “Family Letter” they state “Other factors to consider include quality, the need for the product, and perhaps, the product’s effect on the environment.”

Here’s one example from this study guide:

5. Use the sign below to solve the problems. Explain how you found your answers.
DOUGHNUTS
60 cents each
6 for $3.40
$6.80 for a dozen

b. Pretend that your mother sent you to buy 11 doughnuts. If you had enough money, would you buy a dozen doughnuts instead? Explain.


I’m guessing here, but since we’re supposed to be talking about rates, and the student is supposed to understand unit price and be a wise consumer doing comparison shopping, the objective is supposed to be to choose the lowest price per unit-- the "best buy".

It seems to me that they never asked which is the best buy. Or did I miss something? Fuzzy, fuzzy, fuzzy!

Indulge me for a moment, but...

  • What if I always listen to my mother? Shouldn’t I buy only eleven even if I am going to save a few coins by buying the extra doughnut?
  • What if we only need 11 doughnuts and mommy doesn’t want to be tempted by the 12th one because she’s on a diet?
  • What if they only have 11 doughnuts in the flavor that I want to buy. If I buy that 12th doughnut, no one is going to eat it and I will have wasted my money.
  • What if Mom said I could keep the change and I’m saving up for something really cool? (Remember she’s only expecting eleven doughnuts).

I think you get my drift…

Are any of these answers acceptable? If they were, did it really teach me about rates as a mathematical concept? If they are not, then what is the point of asking such an "open ended" question?

I guess this is one of those "consumer" questions that's supposed to make me a better shopper. (From the "Family Letter": "Is an item on sale necessarily a better buy than a similar product that is not on sale?" Well that depends....

Oh boy, am I glad this is the last chapter. Can’t take much more of this fuzzy logic. I need a break (so do my kids!)

Monday, May 28, 2007

CBS "Reform Math" Story

I was watching the CBS story about "Reform Math" that aired on Saturday, May 26th. On the one hand, I'm encouraged that the controversy with reform math programs like Everyday Mathematics made the network news and found its way into living rooms across America. On the other hand, I dissapointed that the story wasn't more balanced.

http://www.cbsnews.com/stories/2007/05/26/eveningnews/main2855775.shtml?source=RSSattr=HOME_2855775

CBS highlighted interviews with a parent who is supplementing with traditional math at home and one of the authors of Everyday Mathematics. However, there were no interviews with mathematicians or scientists or leaders of the many grassroots parents groups that oppose reform math, there was no data about the decline of our nation on international standards assessments like TIMSS (Trends for International Math and Science Study), they didn't even mention the National Mathematics Advisory Panel that is in the process attempting to sort out the state of math education in our schools. And so, for the most part, the story was unbalanced. But hey, it was a two minute piece and at least it got a few people thinking about this issue that might not have otherwise.

So, what bothered me most about this story? It was something that Amy Dillard, one of Everyday Mathematics authors, said:

"We're preparing kids now for jobs that we don't even know are going to exist, and we can't be teaching them the same mathematics that we did years and years ago, we really have to prepare them for the workforce that they'll be headed to,”
says Amy Dillard, author of “Everyday Mathematics,” a reform math textbook.


Message to Amy Dillard: How could you possibly know how to prepare someone for a job that you don't even know is going to exist? How are you so certain that students should rely on the "spiral" to get them to where they need to be in the future if you admitedly have no idea what that future holds for them? Are you even aware that there's an entire world that is producing generations of mathematicians and scientists using methods of teaching mathematics that continue to respect the value of traditional algorithms? These high performing nations aren't teaching reform math, that is for certain.

"Asian countries are setting the pace in advanced science and math."
-Ina Mullis, codirector of the International Study Center at Boston College that manages the TIMSS.

And guess what, Ms. Dillard, you won't find Asian countries touching reform math with a ten foot pole. In fact, they must be thanking you for increasing their competitive advantage.

Friday, May 25, 2007

Everyday Mathematics: When Comedy Becomes Reality

Experiment:
I showed my kids a couple of comedy gags from the 50's about math without telling them what they were about and refrained from making any comments to gauge their reaction.

Sample Data:
If you haven't watched Abbott and Costello or Ma and Pa Kettle "do math", you might want to do that now:

Abbott and Costello Math

and

Ma and Pa Kettle Math


Reaction:
My fourth grade daughter said, "Hey mom, that's just like Everyday Math! They're using invented algorithms" as she giggled uncontrollably. My first grade son said, "Mom, those answers are wrong." He then proceeded to tell me the right answer for each equation and asked if he was correct. (Which he was) but being new to the mysteries of Everyday Math, he seemed somewhat perplexed.

From the mouths of babes.

I just can't wait to hear what they have to say about Lisa Simpson's take on constructivist math ideology:
(The Simpsons on math)


It's a sad statement that what was a funny gag a half century ago and what is clearly satire in our generation is eerily similar to what's happening in constructivist classrooms today.

Comedy has become reality and I'm not amused.

Wednesday, May 23, 2007

Math as a Foreign Language

A violinist who still worries about fingering positions cannot hope to impress with the beauty of tone or the elegance of phrasing, and an opera singer without the requisite high notes would try in vain to stir our souls with searing passion. In good art as in good mathematics, technique and conception go hand in hand.
Hung-Hsi Wu


I don’t know if I’ve ever spent as much time thinking about mathematics as I have lately. I am an interpreter by training and aside from the calculus, trigonometry and statistics I took in undergrad, and the business type math I took in grad school, my world is a world of language. I do know about learning language, teaching language, and speaking a foreign language, however, and it occurs to me that it is much like learning math.

Math starts out much like a foreign language, something unfamiliar with it’s own symbols, and meanings, and structures. It’s hard work at first and requires repetition, memorization, and practice. You’re not really comfortable with a new language until you use it over and over, consistently and successfully. There is no resting on your laurels, because fluidity depends on practice and vocabulary depends on exposure to rich sources of language.

You don’t discover the language on your own. You don’t invent the language. The language is already there for you to master, to seize, to make your own if you’re willing to work for it. It’s a beautiful thing to move seamlessly between two or more languages but it doesn’t magically appear by placing a dictionary under your pillow and wishing it so.

You learn language by listening to others speak, by looking words up in the dictionary, by learning the rules of grammar and then memorizing the “irregular” applications that break all those rules. Finally, you are able to communicate with others in this new language and the more often you do so, and the more challenging the conversations become, the more you grow in your ability to communicate.

You can always tell who had the benefit of a good foundation through formal instruction (grammar, syntax, pronunciation, vocabulary) and who just "picked it up" informally, on their own and without academic support. The latter tend to be more limited in the range and depth of communication in that foreign language. There is a limit to what they are able to accomplish with the "tools" in the "toolbox" so to speak. Those with the strong foundation move through their discipline with ease, with confidence and with mastery. I think the same applies to many other disciplines be it ballet, basketball, the violin or dare I say, mathematics?

Yes, learning math is much like learning a language. When you master the basics through diligence, perseverance, and the benefit of good instruction, one day without realizing it, you’ve opened the door to a whole new world.

Thursday, May 17, 2007

Everyday Math: A Nimble Mind is a Terrible Thing to Waste

Okay, I think I’m going to be sick….

My first grader, who loves math and finds it quite easy, sat down to do his Primary Mathematics (Singapore) and Kumon work. This day's work involved word problems requiring subtraction of double digit numbers with regrouping. He said, “Mom, do we have a number chart?” I said, “A number chart? You haven’t used one of those since you were learning to count. Why do you need one now?” “Because” he said, “that’s how we’re subtracting at school.” “Well, you know how to subtract without one. Just set up your problem and then you can do the math!” It took him no more than five minutes to complete the entire exercise of world problems.

Why did he think he needed a number chart to subtract when he’s done this type of math before successfully? To think of him counting back to find the answer on some number chart for each question when he already knew a much more efficient way to do it is disconcerting. He finished and promptly asked if he could work ahead on the next exercise.

This is another reason to dislike Everyday Mathematics. I feel likes it's a constant fight to keep the efficient algorithms in play lest my children come under the false notion that the EDM way is actually better, cooler, or newer. The teacher is teaching it, their friends are using, so maybe it's better and mom hasn't caught on yet. I don't mind if he learns about them but doesn't EDM pride itself on letting students choose? I strongly believe that most every additional algorithm is a collosal waste of time and who has time to waste? (If you don't believe me, just check out this video on youtube http://www.youtube.com/watch?v=eKld7lQHKRg )

I find them to be inefficient, unnecessary. I also believe that dependence on manipulatives, charts and calcuators certainly does not allow children's minds to do all the amazing things they are capable of. These methods reinforce and even reward laziness and when they rely on these "crutches" children fail to exercise their brains and train them to work nimbly.

And a nimble mind is a terrible thing to waste.

Wednesday, May 16, 2007

Jimmy Neutron's Unofficial Take on Constructivism

"What's the point of being smart, if it just makes me miserable?"
- Jimmy Neutron

Methinks that the Boy Genius would detest “constructivist math” curricula like Everyday Mathematics, Connected Math and TERC. For that matter, so would Cindy Vortex!

Here is what I imagine James Isaac Neutron might have to say about Everyday Math:

  • I don’t have time to waste discovering algorithms that were perfected ages ago. I think Euclid, Descartes, Pythagoras, and Pascal did a pretty good job.
  • Thank goodness for long division. Polynomial long division (algebra), finding roots and asymptotes (pre-calculus), and integration of rational functions and Laplace transforms (calculus) wouldn’t be possible without it. Yep, gotta have long division!
  • Sorry guys, there are no shortcuts to math mastery. You just gotta be computationally fluent in mathematics and be able to calculate quickly and accurately. Come on Sheen, I’ll help ‘ya with those times tables!
  • Using a calculator is a cop out. My brain works faster and it never runs out of batteries! Carl, put that calculator away, you can multiply decimals without it.
  • Partial products, partial quotients, lattices, and trading-first! Are you kidding me?

"Gotta blast!” –Jimmy Neutron

Monday, May 14, 2007

Tired of Everyday Math

I lose a lot of sleep over Everyday Mathematics and I’m very tired. My children are tired too. They give up much of their free time to do extra homework (supplementation with other material) that actually builds the foundation they will need to succeed without a calculator. The effort is certainly worth it, but that doesn't make it any less exhausting. I am beyond frustrated...similar to the process of mourning when you finally get to that acceptance that you must move forward. I'm tired of researching, writing letters, and becoming more and more angry. I'm tired of talking to administrators who either just don't get it or just don't care.

What bothers me most is that our children are inheriting some monumental problems--- global warming, terrorism, and massive national debt, for example. It will be the job of our children’s generation to find a way to make things better. To correct all the errors we made along the way. That takes knowledge, science, engineering, and a strong foundation in mathematics. Ironically, in our hour of greatest need our public schools aren’t giving our children the tools they need to succeed in this huge endeavor. For over two decades these constructivist math curricula have found their way into our classrooms and the damage they are causing has long term consequences for the future of our nation. It’s really that serious. It’s really that important. It's really that timely.

They call this debacle the “math wars” and sadly, a war is certainly what it has become. So much arguing on both sides of the debate, no one willing to admit that an experiment isn’t working out as planned while only the textbook publishers benefit from the bonanza of meaningless standardized testing and curricula that lacks content while our children keep waiting for us to figure the whole mess out. In the meantime, our children lose precious time, precious learning opportunities, and the precious gift of choice. They are robbed of the chance to fulfill dreams and change the world along the way. It is a war, and nobody wins.

Mostly, I am frustrated that curricula like Everyday Mathematics goes against what I teach my children. I’m not just referring to the importance of mastery, quick math fact recall, and agile mental math ability, I’m referring to something much bigger…. WORK ETHIC. Our children will need to work harder, smarter and better than their international peers to succeed in the global economy. What does Everyday Mathematics teach them? Don’t worry about long division or complicated multiplication, just use a calculator. In fact, we think calculators are so important that we’ll teach your kindergartner how to use one. Math should always be fun and games, we shouldn't submit them to ‘rote memorization’ (drill and kill). That’s too boring, that’s too traditional, that’s just a waste of creative time that could be used for discovery. Well, guess what? Sometimes work is fun, but sometimes work is work and you just have to bear down and do something until you get it right. Like learning to add, subtract, multiply and divide effortlessly, accurately, and efficiently.

In The World is Flat: A Brief History of the Twenty-First Century in a chapter entitled “The Quiet Crisis”, Thomas L. Friedman says it much better than I ever could:

I am not suggesting that we militarize education, but I am suggesting that we do more to push our young people to go beyond their comfort zones, to do things right, and to be ready to suffer some short-run pain for longer gain. --Thomas L. Friedman