Happy post-Thanksgiving! To all Seattlites looking for a math-rich event for kids, we’ve finally got some Math Salons on the calendar, starting in January. Interested in joining [...]
(Click here for part I) Recall the puzzle: Step 1: Choose a starting number. Step 2: Square the number. Step 3: Sum up the digits of that number. Step 4: Repeat steps 2 and 3 [...]
One of my students yesterday shared an idea with me that he had kicking around in his head for a while, which he called continued multiplication. Essentially, he used the steps in [...]
What is joseki? It’s a handy word, and used frequently in Japan. A remark overheard one clear morning: ‘I’m going to follow my joseki and take the dog out for a walk.’ … These days the word ‘joseki’ has come into general use [...]
Two problems have been floating around in my head lately, and it’s only fair to share them, and let you know where I got them. Imagine this: You have four bottles of liquid. [...]
I had to begin enjoying the act of teaching and the only way I could do that was to start over, teach what I loved and to hell with the curriculum.
“Nothing is more attractive to me than a muddled domain awaiting its first theory. I feel most at home with a jumble of glittering data and the feeling that they might be fitted together for the first time into some new pattern. This [...]
We’ve been loving running math workshops for teachers. First of all, teachers are awesome: they’re some of the hardest working, most motivated people out there. They want to [...]
I have a new resolution: I will use color in equations from now on. My inspiration was a post on the Fourier transform [thanks to Kalid for referring me to it]. The author, Stuart Riffle, begins with a familiar experience… a mathematical [...]
[See Squares of Differences I and Squares of Differences II, and apologies for the tardiness of the posting] I’ve learned a lot about Squares of Difference in the last months. [...]
Katherine and I are back in Seattle after a summer away, exploring the mathematics of activities not normally associated with math: building a kitchen, planting gardens, and [...]
Katherine submitted the puzzle for this week’s Numberplay at the New York Times Puzzle Blog, a lovely puzzle in honor of Avoid Triangles At All Costs (ATAAC) Day. So… 1. Check it out here! 2. Comment! We (and the people in charge of [...]
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