Author Archives
In 2018 I semi-retired by retiring from Weston High School after my 21st year teaching mathematics there. This was also my 44th year as a teacher altogether. In 2023 I retired fully, adding in my 18 years at Harvard’s Crimson Summer Academy each summer. For 21 years I had taught at the Saturday Course in Milton, MA, and I used to serve on the board of the Dorchester Historical Society.
I read, cook, and spend a lot of time building my model railroad. For some reason I’m left with less free time than would be ideal, considering that I’m supposed to be retired, but somehow I also manage to devote time to my wife, Barbara, and to our varying number of cats (once up to six, but now sadly down to one).
Larry Davidson
ljd@larrydavidson.com
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Playtime
I’m not quite sure what I think of this 1967 Jacques Tati movie, which I just saw for the first time. It’s a bit slow, a bit French, and a lot jarring. The set is supposed to look like Paris,… Read More ›
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Persistence
NPR aired a fascinating report this morning in its Your Health segment of Morning Edition: “A Struggle For Smarts? How Eastern And Western Cultures Tackle Learning,” reported by Alix Spiegel. Everyone knows the stereotype of the successful Asian student, and there’s… Read More ›
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The Dead Puppy Theorem
(a + b)2 = a2 + b2. Right? “No, of course not,” you say. Or maybe you say “Yes, of course.” If you say yes, you’re making the same mistake that 42% of high-school students make. I just invented that statistic on the spot,… Read More ›
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MIT does not equal Mitt
They don’t even sound alike. An MIT alumna was nearly prevented from voting in Florida because she was wearing an MIT shirt. A poll worker thought she was illegally campaigning for Romney inside the polling place.
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What motivates teachers and students?
This is important! You’ve got to set aside ten minutes and watch this TED talk by Dan Pink. While it’s not specifically about teachers, nor specifically about students, it tells us a lot about what motivates and doesn’t motivate both groups. Presented by… Read More ›
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Math wins!
This morning’s XKCD:
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Fractal pancakes!
Maybe some of my precalculus students will make fractal pancakes for the Fractal Fair in March (though I’m not sure where we could serve them, as the Fair is held in the school library). Here’s what they look like:
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An excellent way to improve a school's test scores
What’s the best way for a school to improve its test scores? That’s easy: you get rid of all the low-performing students, of course. Or you send truant officers to their homes on the morning of test day, and the… Read More ›
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How many other good teachers are going to quit for similar reasons?
A North Carolina teacher named Kris Nielsen recently posted a letter that has been finding its way around the Internet. As a teacher in Massachusetts, I am fortunate not to have the problems that she reports, but they ring all… Read More ›
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Emulating the TI-84
American schools have been using Texas Instruments calculators for more than a quarter of a century now. They have become the de facto standard. More recently, computers and projectors have become ubiquitous, so you would think that we would have a better… Read More ›
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Boston Cream
I had never heard of Canadian crime fiction writer Howard Shrier before reading Boston Cream, part of Shrier’s series featuring Toronto detective Jonah Geller. In a recent interview, the author said that “some Canadian readers have said that these books are… Read More ›
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Privacy is highly overrated.
Actually, privacy is a fine idea. But anyone who thinks we have it anymore is deluded. Basically, everything about you is available to anyone who looks hard enough. But that doesn’t mean that we should give it up voluntarily. The… Read More ›
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What is school for? Eight things in education that will change.
Set aside 17 minutes, and go watch this video by Seth Godin. Then watch it again. It’s not that I agree with all of Godin’s eight points — in fact, there’s a lot that I disagree with. Nevertheless, the 17… Read More ›
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Sandy
Power just went out…then it came on…then it went out…then it came on…then it went out for a longer time…now it’s back on (obviously)…. So I’m sitting here grading geometry quizzes, while Douglas naps on my left side (when he… Read More ›
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"Questions are more important than answers."
A new book by…Dan Rothstein and Luz Santana…, Make Just One Change: Teach Students to Ask Their Own Questions, documents a step-by-step process to help students formulate and prioritize questions about nearly everything. So writes Katrina Schwartz. Not that the idea… Read More ›
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Ex-Marine turned teacher: "Stop demonizing me and my profession."
That’s the pull quote that a recent Washington Post column uses as a headline for a link to a must-read piece. I love the juxtaposition of “ex-Marine” and “teacher,” so I’ve kept the headline. There are not very many teacher-haters… Read More ›
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The travel(l)ing salesman: a movie?
If you’re into advanced discrete math, you know all about the Traveling (in the U.S.) or Travelling (in other English-speaking countries) Salesman Problem. If you aren’t, you don’t. I won’t attempt to summarize it here; just go read about it… Read More ›
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What can goats teach us about problem solving?
A lot of people take their dogs along for a hike…but never before had I heard of taking one’s goats hiking. “What,” you may ask, “does this have to do with math?” Read Dan Finkel’s excellent post. And be particularly… Read More ›
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BYOT
It seems that we will soon be following in the footsteps of other schools that have adopted a “bring your own technology” plan. Many of our students already bring MacBooks, PC laptops, or iPads to school, so the idea is… Read More ›
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AP classes are a scam (says John Tierney).
In a recent article in The Atlantic, John Tierney claims that “Advanced Placement courses [are] one of the great frauds currently perpetrated on American high-school students… The AP classroom is where intellectual curiosity goes to die.” Like most other provocative essays, Tierney’s piece… Read More ›
Learning Strategies 