There’s More to Math Than Drills

I like practicing. I’m weird that way.

When I was really into guitar, I looked forward to my daily regimen of chromatic scales. I liked playing pentatonic triplets and G major chords up and down the neck, over and over again. Sometimes I’d block off an entire day just to practice. Part of me found satisfaction in the repetition, but I also knew that every note I played was another small step toward mastery. Sore fingertips and cramped hands were what learning felt like.

But there’s a lot more to learning than drilling. I knew it back then, on my way to channeling Mississippi John Hurt, and I know it now as a teacher. This repetitive practice worked as a part of a broader approach. Yes, I needed to drill. But I also needed to experiment, explore, collaborate, theorize, and reflect. Real learning requires all of this, and more.

So as a teacher it frustrates me when drilling is proposed as the remedy to society’s mathematical struggles, a topic discussed in this recent New York Times op-ed. Yes, students should know that 7 x 8 = 56. But they should also know how to think flexibly about numbers, so when they have to multiply 71 and 83, or 7x + 1 and 8x – 4, they won’t panic when they can’t find the answer in their times table.

Students should understand multiplication, not just perform it. They should know how multiplication can sometimes be thought of as repeated addition, and why sometimes it can’t. They should be able to interpret multiplication geometrically, as area or proportion. They should recognize the algebraic structures of multiplication in other mathematical contexts, like functions and transformations.

Facility with numbers and command of basic facts are a good start, but drilling can only take you so far. The note you want isn’t always in the scale you’re working on. To play along, you’ve got to learn how to improvise. To write your own songs, you’ve got to transform those scales into something fresh and exciting. This is what doing math can feel like. And this is what we should want more of for our students. Not more drills.

We know the dangers of pushing excessive practice. Ask anyone who gave up studying an instrument why they quit and the drudgery of drilling is likely to come up. Those who end up not liking math often tell a similar story.

And this emphasis on drilling can be especially harmful when partnered with out-of-touch portrayals of math instruction. Learning for understanding is not at odds with practice and fluency. Fun does not need to come at the expense of the struggle that learning demands. Getting the balance right for every student and every class isn’t easy, but that’s why teaching math is such a complex and exciting challenge.

Perpetuating these false dichotomies can actually reinforce the obstacles we face in learning math and improving education. They convey an inaccurate picture of what math is about. And they undermine the trust between teachers, parents, and students that success requires. Like excessive drilling, this can end up doing more harm than good.

This essay was also published on the NSTA’s blog as part of my work as an NSTA / NCTM National STEM Teacher Ambassador.

How Network Math Can Help You Make Friends — Quanta Magazine

My latest column for Quanta magazine introduces network science, an area of mathematics that has developed rapidly over the past 30 years and has impacted fields like computer science, biology, and economics.

In my column, I use friendships to develop the basic concepts of networks and explore different structures.

When you start at a new school or job, or move to a new city, how do you go about making new friends? You could take an active approach, forging strategic connections with the popular kids and the movers and shakers. Or you could leave things to chance, relying on random groupings and associations. Whatever your approach, understanding the structure of existing friendships in your new community can help you make the best connections, which will ultimately define your circle of friends.

One particular network structure, the so-called scale-free network, has emerged as a useful model in a wide variety of fields. But recent research suggests that these scale-free networks may not be as ubiquitous as we might have thought. You can learn more by reading my column here.

08/21/2018 — Happy Derangement Day!

Today we celebrate a Derangement Day! Usually I call a day like today a Permutation Day because the digits of the day and month can be rearranged to form the year, but there’s something extra special about today’s date:

The numbers of the month and day are a derangement of the year: that is, they are a permutation of the digits of the year in which no digit remains in its original place!Derangements pop up in some interesting places, and are connected to many rich mathematical ideas. The question “How many derangements of n objects are there?” is a fun and classic application of the principle of inclusion-exclusion. Derangements also figure in to some calculations of e and rook polynomials.

So enjoy Derangement Day! Today, it’s ok to be totally out of order.

NYSMTP Summer Conference

Next week I’ll be attending and presenting at the New York State Master Teacher Program’s annual Summer Conference at SUNY Cortland.

The NYSMTP summer conference brings together Master Teachers from around New York state for two days of professional learning and networking. The theme of this year’s conference is “Convergence”, and features presentations from Dr. C. Alex Young from NASA, mathematician Steven Strogatz from Cornell, and New York’s Education Commissioner MaryEllen Elia.

I’ll be presenting Scratch Across the Math Curriculum with Dan Anderson, a Master Teacher from New York’s Central Region. Dan and I will be sharing our work bringing computer science into math class using the Scratch programming language. This is a continuation of the work I’ve been sharing at workshops and conferences across the country the past several years.

I’m proud to be a part of the NYS Master Teacher program through Math for America, the NYC-based organization that served as a model for the state program, and I’m grateful to MfA for their support in participating in events like the NYSMTP’s summer conference.

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