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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The Witch of Agnesi
What math teacher could resist a mystery titled The Witch of Agnesi. Of course if you’re neither a math teacher nor a mathematician, you’re probably scratching your head right now, wondering, “What is he talking about?” Well, the Witch of… Read More ›
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Defaults
“Default, dear Brutus, is not in our stars, but in ourselves…” No, that doesn’t seem quite right. I don’t think Shakespeare had Cassius talking about defaults, did he? But it’s what I think of when we just assume that defaults… Read More ›
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Collaborating with colleagues
We had an interesting K–12 professional development (PD) day yesterday (as our students were enjoying a four-day weekend and we teachers had to settle for three days off). The theme for the year is differentiated instruction (DI); the specific focus… Read More ›
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Firing a teacher, part two
A first-year teacher was fired last week for making a bad judgment call. Depending on the version of the story you believe, he either duct-taped a student’s mouth shut or gave her some masking tape and asked her to tape… Read More ›
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I'm delighted to learn that I was wrong
In my review of Transit Maps of the World a couple of days ago, I made the following observation: I have to admit that it will appeal strongly only to readers who are fascinated both by cartography and by railroads,… Read More ›
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Adults and math: Who needs a formula?
OK, this is just one example. It’s purely anecdotal evidence, and therefore it doesn’t prove anything. But it’s still indicative of a problem with adult attitudes toward math. A bit of background first: if you don’t have the good fortune… Read More ›
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Transit Maps of the World
This gorgeous book — I might even call it stunning — must have a rather limited audience. Although I’m tempted to add it to my list of favorite books (see my profile in this blog), I have to admit that… Read More ›
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Mathematicians are Platonists
In this past Sunday’s New York Times Book Review, Jim Holt wrote a mildly interesting review of the new book by John Allen Paulos, Irreligion: A Mathematician Explains Why the Arguments for God Just Don’t Add Up. Since I haven’t… Read More ›
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Life imitating art: Academy X & Firing a teacher, part one
Continuing my accidental theme of reviewing works of fiction about life at elite high schools, such as Prep, Restless Virgins, and Dangerous Admissions, I have just finished reading Academy X, a satirical novel by Andrew Trees. It’s not clear whether… Read More ›
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No comment
A reader of both this blog and Adam Gaffin’s Universal Hub asked why I’ve turned off comments in my blog. Naturally he had to ask the question on Universal Hub. I replied as follows: I have comments turned off because… Read More ›
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The fuzzy math of Huckabee's FairTax
There are many things to dislike about Mike Huckabee’s proposal for a 30% national sales tax, the so-called Fair Tax, such as the fact that it’s thoroughly regressive. (It would lower taxes slightly for the poor, lower them tremendously for… Read More ›
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Stay off the main drag
“Please if possible stay off Dorchester ave until the community gets more information,” writes a well-known Dorchester community activist with an incendiary temperament. This sentence was part of a mass email sent out in response to a targeted killing on… Read More ›
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Can a middle-aged professional become a math teacher?
We had an interesting visit yesterday from a local accountant who is considering making a mid-career switch and becoming a math teacher. He spent most of the day at Weston High School, talking with teachers and kids and observing classes…. Read More ›
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What does this have to do with math?
Three different experiences in Algebra II today have caused me to rethink the value of projects. Although I’ve always had a theoretical appreciation of project-based learning, I’ve also always had grave doubts about placing a whole lot of emphasis on… Read More ›
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Rubrics
I was giving my Algebra II class more details about the project they had just started working on. It’s an exploration of exponential and linear functions, with a story line for which I cannot take credit but which I’m happy… Read More ›
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Hell for the Holidays
I just finished reading Hell for the Holidays, a thriller by Chris Grabenstein, author of Tilt-A-Whirl and other mysteries. Two years ago I recommended Tilt-A-Whirl enthusiastically. Unfortunately I can’t make a similar recommendation for Hell for the Holidays. Although it’s… Read More ›
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Why do homework?
“Why should I do homework if it isn’t going to be graded?” It’s tough to give a convincing answer to that question. Typically we point out that homework helps you learn, but that answer goes only so far. We may… Read More ›
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Pi plate
A solstice present (from my sister Ellen, of course):
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The Yiddish Policeman's Union
Just finished listening to the audiobook of The Yiddish Policeman’s Union, by Michael Chabon. This hybrid novel fits squarely in the hardboiled-detective genre — except that it also fits into the alternative-history genre. The premise is that the state of… Read More ›
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There's nothing like promoting stereotypes
Overheard in Weston: “She’s even more Asian than we are.” “How could that be? She’s blonde. She doesn’t look the least bit Asian.” “She gets better grades.”
Learning Strategies 