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 ››
When I was in sixth grade, my family spent one year in Switzerland, which is where my parents come from and where my extended family still lives today. I went to a typical secondary school that year, and it gave me a student's view of a very different educational system from that in the U.S. Continue Reading ››
I was taken aback when I saw that a theater was showing the Michael J. Fox movie, Back to the Future, in celebration of its 25th anniversary. My first thought was, “Darn, am I that old?” After taking my Gingko Biloba, my memory was successfully jogged … Continue Reading ››
Do you remember your high school geometry class? I sure do—and I remember it fondly. Mr. Brooks was in his first year at my high school, and we thought he was kinda cool with his full red beard and professorial glasses. In the first five minutes of our first class with Mr. Brooks, he told us … Continue Reading ››
As I recently worked on correlating our materials to the newly released Common Core State Standards, I was surprised to find many of the topics we commonly associate with a high school geometry course placed throughout the standards for elementary grades. I was surprised, but not shocked. In fact, I've believed for a long … Continue Reading ››