Remembering Lew Douglas: An obituary for a leading Bay Area math educator, and an invitation to share some of what we learned from him at a gathering in Berkeley.
Retakes vs. Test Corrections vs. Neither: In which I argue in favor of test corrections, done as homework, for “points”.
Taking Notes vs. Doing Math: In which I take on a sacred cow — teach math, not note-taking!
Updates to my Math Education Page
Iterating Functions: This page includes interesting materials on this topic, ranging from pre-algebra to precalculus. I added a new lesson by Rachel Chou, about an unexpected application of these ideas to geometry: Triangles and Iterations.
Doctor Dimension: This is a small unit with big ideas mostly about rate of change, including several GeoGebra applets and a selection of worksheets. It can be used in different ways, in grades 8-12. I added a link to another lesson about piecewise functions.
Puzzles in Math Curriculum: I combined a couple of blog posts into an article where I break down what makes a good puzzle, and more specifically, what makes a good puzzle in math class.
What else is new
5 October 2019: Along with Kim Seashore and perhaps others, I will be a presenter at Lessons from Lew, a free professional development session. We will share Lew Douglas’s lessons on trigonometry, the golden ratio, symmetric polygons, and more. 11:00 to 12:15, at Longfellow Middle School in Berkeley. Register here.
23 August 2019: I sent out my e-newsletter. The main topics were: “Taking Notes vs. Doing Math”; a review of a book that was a big influence on my teaching; the place of puzzles in math education. Plus a lot more. Subscribe!
27 November 2018: I moved my blog into WordPress (here.) I thought the move had happened smoothly, but some graphics, and some entire posts, failed to materialize. Also, many links are broken. If you come across these problems, please notify me, indicating which post had the issue. Thanks!
I have retired from the classroom after 42 years as a math teacher in K-12 — from counting to calculus. I now work with teachers and schools:
Math Education Consulting
On this page: announcements about new material, updates, etc. on the site; new publications; my appearances at conferences; and my other activities in math education.
Note: All material on this site is copyrighted. You may reproduce it for any non-commercial purpose, as long as you credit me and link to the blog. More info.
(I am also involved in word puzzles, especially cryptic crosswords.
More on this.)