Of all the conic section construction techniques, my favorite is undoubtedly the approach that requires nothing more than a paper circle. Here's what to do: Draw or print a circle and its center, point A, on a sheet of paper. Cut out the circle. Mark a random point B anywhere on the circle. Then, fold … Continue Reading ››
Today I leave for my first proper vacation in a year and a half. Last time I took such a vacation, Key sold its high school textbooks to Kendall Hunt and transformed from a publishing company to a educational technology company. This time I just hope to survive the end of the world. 🙂 Before … Continue Reading ››
The other week Dan Meyer sent out this tweet.
I'm not sure what Key Curriculum Press is anymore but they run a helluva math ed blog. blog.keypress.com — Dan Meyer (@ddmeyer) January 20, 2012While we appreciate the compliment (and the resulting increase in traffic), it's the first part of that sentence … Continue Reading ››