Take any quadrilateral, like this one then mark the midpoints, and connect them up. It sure looks like we’ve built a parallelogram, doesn’t it? The [...]
(Click here for Part I or Part II) Recall the puzzle: Step 1: Choose a starting number. Step 2: Square the number. Step 3: Sum up the digits of that [...]
(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: [...]
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, [...]
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 [...]
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 [...]