Now that the first season of Numb3rs is in reruns, I’m finally getting around to watching this show and have seen three episodes at this point. So far, so good. I haven’t yet seen the episode referred to in the… Read More ›

# Math

## Blogs in the math classroom?

Blogs are public writing. We want our students to publish their work — to take ownership of it, to take personal responsibility for it, to take pride in it. These goals apply not only to English class but also in… Read More ›

## Radians

From Trigonometry for Dummies, by Mary Jane Sterling: Measuring angles in degrees is easier, but measuring angles in radians is preferable when doing computations. The radian is more exact because the radius, circumference, or area of the circle is involved…. Read More ›

## Misanalyzing textbooks

The Washington Monthly publishes an interesting example of the lies about incorrect analysis of math textbooks by right-wing zealots. Not that I’m a fan of very many textbooks, but a little truth would help.

## Honors math courses

Weston, of course, is really Lake Wobegon, where all the children are above average®. Weston’s only public high school has just two levels of math courses: the higher level is called honors, the lower level college-prep. Everyone is above average…. Read More ›

## Notes on a textbook

This note, written by a junior, was attached to the precalculus book she was returning: Dear Mr. Davidson, Here is my book. I have enjoyed it thoroughly. I read it when I was feeling down, and it raised my spirits…. Read More ›

## Distribution of U.S. incomes

Check out this interesting visual representation of U.S. income distribution. Try zooming out and out and out…

## Fermat's Last Theorem limericks

Weston High School held a math haiku contest, but maybe we should have had a math limerick contest instead. Here are some math limericks about the proof of Fermat’s last theorem (from a contest held at the University of Illinois… Read More ›

## Cantor's proofs

A lot of my precalculus students today didn’t like and/or didn’t believe Cantor’s proofs of the denumerability of the rationals and the non-denumerability of the reals. A few articulated their disbelief; most were quiet and attentive, but how many of… Read More ›

## Stunning graphs of equations

You have got to go look at the Visual Dictionary of Famous Plane Curves and study some of the stunning images that Xah Lee has collected. I particularly recommend his collection of sinusoids and his gallery of graphics based on… Read More ›