I attended the San Francisco Math Teachers' Circle last weekend. It was facilitated by Paul Zeitz. The topic: showing two polygons have equal area by cutting one into pieces, and rearranging them to cover the other one with no gaps or overlaps.The assumption was that the area of a rectangle is length times width. The… Continue reading Scissors Congruence!
Month: October 2017
On NCTM, Part 2
In Part 1, I discussed my relationship with NCTM, its Standards, and its journals, mostly The Mathematics Teacher. In this post, I discuss NCTM conferences, and compare them with other math teacher gatherings.NCTM Conferences vs. Local ConferencesI've had much, much better luck attending great sessions at my local Northern California conference in Asilomar (Pacific Grove,… Continue reading On NCTM, Part 2
On NCTM, Part 1
I've read a few blog posts about the National Council of Teachers of Math (NCTM) in the last few weeks:Three posts by Tina Cardone, which can serve as an introduction to NCTM. NCTM and the Math Forum by Tracy Zager, including links to other posts (including NCTM's response) about the shutting down of the Math Forum.My… Continue reading On NCTM, Part 1
Henri's Math Education Blog 