Common Core and “Who Needs Algebra?”

Every so often, some variant of the question “Is Algebra Necessary?” comes to the fore in our national conversation on math education.

As I’ve written before, conversations like this don’t bother me.  I love math and I love teaching math, but I think the underlying questions here, “How much math, and what math, should everyone be required to know?”, are legitimate and worthy of serious consideration.  The mere fact that it keeps coming up suggests we don’t have great answers to these questions, or even great explanations as to why things are the way they are.

So I’m always interested in pieces like NPR’s “Who Needs Algebra?”, which describes how colleges around the country are trying to address the problems created by algebra requirements.  According to NPR, nearly 50% of community college students fail to graduate because they can not pass a required algebra course.  For this reason, algebra is often called a gatekeeper course, as it prevents access to the credential of a college degree.

As the piece notes, colleges are doing some interesting and innovative things to try to get students around the algebra requirement.  One particular approach, developed by the Community College Pathways initiative, offers statistics and quantitative reasoning courses that “largely skip over abstract algebraic formulas and go directly to math concepts that students will use and find engaging”.  The piece speaks positively about this new approach, which I think has merit and deserves attention.

But I can’t help but wonder how this fits in with the Common Core standards initiative.  The Common Core state math standards mandate a substantial amount of algebra in junior high and high school.  In many cases, this is the same algebra that colleges are attempting to circumvent in order to increase graduation rates.  How can mandatory algebra in high school be reconciled with optional algebra in college?

I think about Common Core, too, when I read about the great work Cornell professor Steven Strogatz is doing in “teaching math to people who think they hate it“.  Strogatz, both a renowned mathematician and teacher, is implementing a curriculum based on Westfield State University’s Discovering the Art of Mathematics, and is finding great success reaching math-averse liberal arts students with its activity- and inquiry-based approach.  But can this type of course, that excites and engages students in authentic mathematics while eschewing the typical trappings of a traditional algebra curriculum, be reconciled with the mandatory algebra standards set forth in the Common Core?  [Strogatz shared some of his informed opinions about math education in his Math Horizons interview last year.]

I don’t believe these various positions are completely incompatible, but I do see a fundamental conflict here.  After all, if a reasonable argument can be made that “Not everyone needs algebra”, then mandating algebra for everyone seems likely to create as many problems as it attempts to solve.

Did No One Care About Seth Godin?

In his typically direct style, Seth Godin’s “Good at Math” purports to rebuke the common belief that if you’re not a math person then you’re destined to never be good at math. This is indeed a destructive attitude, and one we should work to dispel.

Unfortunately, Godin’s piece takes an all too familiar turn. If not genetics, Godin wonders, then what has prevented you from learning math?

If you’re not good at math, it’s not because of your genes. It’s because you haven’t had a math teacher who cared enough to teach you math. They’ve probably been teaching you to memorize formulas and to be good at math tests instead.

To Seth Godin, the answer is simple: Bad teachers. And not just incompetent bad, but uncaring bad.

This claim is ridiculous.

First, most teachers care quite a lot about what they do, and whom they serve. Saying that students don’t learn because teachers don’t care is not only insulting, but it demonstrates a fundamental disconnect with the reality of who teachers are and what they do.

Second, there are many reasons why someone might not master math in school. Math is hard. Learning is hard. Teaching is hard. And even when teacher and student both care deeply, learning doesn’t always happen on schedule.

And if you want to criticize teachers for teaching students to be good at math tests, fine, but know that this is often exactly what teachers are told to do, directly or indirectly. This can be completely consistent with a teacher caring about their work and their students.

Lastly, there’s no point in telling people not to blame their genes if you’re just going to tell them to blame something else that’s largely out of their control. Blaming teachers won’t empower anyone to learn math; it just shifts the blame to a more convenient target. If anything, this argument reinforces the sense of powerlessness that struggling students often feel. At least Godin makes his attitude explicit: It’s far more common in today’s discourse to merely imply that teachers are an obstacle to improvement. Often, it’s simply an unstated assumption.

What would Seth Godin tell a struggling piano student who feels they simply aren’t a “music person”? Is this student not a good piano player because no teacher cared enough to really teach them piano? I suspect anyone who knows how hard it is to learn to play the piano would laugh at such a response. Is anyone laughing at this characterization of math teachers?

The work of a teacher is hard, and teachers work hard. And they care. Blaming teachers for all learning failures is simple-minded and impractical. No attempt to improve education will succeed if it is based on the premise that teachers are incompetent or uncaring, and that students are passive or powerless.

You can read Seth Godin’s piece here. And math educator David Coffey has written a nice response here.

Demonstration of Linear Independence

vectors spanning the plane

I’ve put together a simple Desmos interactive that demonstrates the basic ideas of linear independence.

If two plane vectors are linearly independent, then every vector in the plane can be written as a linear combination of those two vectors.  Those two vectors span the plane.

By playing around with the sliders in this interactive, you can see how every vector in the plane can be expressed as a linear combination of the two original vectors.

Moreover, if you make the two original vectors parallel, they no longer span the plane.  That’s because the two original vectors are now linearly dependent!  Each is a linear combination (in this case, a scalar multiple) of the other.

You can see this Desmos interactive here, and you can find more of my Desmos-based demonstrations here.

Writing in Math Class: Favorite Shape

favorite shapesI love giving short writing assignments to my math classes.  It’s a great way to get students engaged in mathematics in a different way, and it gives me a different window into how my students think and who they are.

Here’s a prompt I gave them recently.

Draw a shape that you like.  Write 1-2 complete sentences explaining what this shape is and why it appeals to you.

This simple prompt was something of an afterthought on a recent assignment, but as usual, the students surprised me with their responses.  Here are some of my favorites.

I like the square because of how organized it is.

The triangle appeals to me because it is the shape of things I love to eat, like a slice of pizza or a piece of cake or pie.

A rhombus is different from other shapes, but so alike.  It shows how a little change can make a new shape.

Circles appeal to me because they have infinite lines of symmetry.

This is a circle.  It has no corners and is symmetrical.  This shape is appealing because it feels open, and since there are no corners, there are no sharp edges to hurt you.

This shape is a circle.  It appeals to me because, as weird as it sounds, I want my life to be as perfect and as well-rounded as a circle.

A triangle is simple.  It has the least number of sides a polygon needs.

I like the square because I like things to be equal, not different.

I’m always smiling, laughing, and thinking after reading what students have to write.  There are lots of great reasons to get students writing in math class, so give it a try!  You can find more resources here.

3D Printing in Calculus Class

I’m looking forward to exploring 3D printing in Calculus class this year.  We don’t have a printer in our classroom (yet!), but some students have enough experience and access to work on modest projects outside of class.

Here’s a print of an interesting surface in xyz-coordinate space.

Beautiful Surface and Printed SurfaceIt’s always exciting to find a new way to represent or experience a mathematical idea, and physical representations can be especially powerful.

And perhaps more importantly, 3D printing gives students an opportunity to use mathematics to create.  Mathematics is a creative endeavor, and whatever helps promote this idea will ultimately help change attitudes about math.

 

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