Fraction Rectangles: A brief introduction to a tool which can help students who are learning how to work with fractions: comparing, adding, subtracting, multiplying, and dividing. (The full description of this approach is on my website: Fraction Arithmetic on Grid Paper.)
Seeing is Believing? In which I argue that watching even beautiful “proofs without words” does not yield learning if students are not actively involved.
Transformational Geometry for Teachers: a transformations syllabus for the professional development of teachers and future teachers of high school geometry.
Updates to my Math Education Page
I added three free-download Pentomino Puzzle Books to the site.
I updated my Summer Workshops page with descriptions of my two online workshops: Symmetry (grades 6-8) and No Limits! (Algebra 2, Trigonometry, Precalculus).
What else is new
2-6 August 2021: With Rachel Chou, I will present an online workshop — No Limits! for teachers of Algebra 2, Trigonometry, and Precalculus. Hosted by Menlo School. Registration opens on April 14. Preregister.
19-23 July 2021: I will present an online workshop on “Symmetry: A Unifying Thread Across Grades and Cultures” as part of the Atrium School Summer Math Institute for middle school teachers.
7 April 2021: I sent out my e-newsletter, which included links to my recent blog posts (Seeing is Believing?, and Fraction Rectangles, and to the new Pentomino Puzzle Books page on my website. I also used the newsletter to promote my summer workshops.
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.)