Two Math Education Books: In this guest post, Amanda Cangelosi, who provides professional development to math teachers, argues that There Is No One Way to Teach Math (a book I co-authored) complements Liljedahl’s Building Thinking Classrooms.
Rate of Change: No One Way! Once again, I argue for multiple tools and representations — this time in a discussion of teaching slope in grades 6-12.
Mentoring and Coaching: a guest post by Margot Schou about how we transmit teacher know-how to the next generation.
Updates to my Math Education Page
I added much more detail to my Rate of Change home page.
I added Leonardo’s Areas (involving the area of circles) and Squaring Pentominoes, a dissection puzzle set.
I added “Geometric Puzzles for Prospective Math Teachers“, a chapter I contributed to a forthcoming book for professors who teach geometry to preservice teachers. The chapter includes links to Tiling, Geometric Puzzles, and Geoboard materials on my website.
All Math Education Page Updates
What else is new
9 April 2026: I presented Reaching the Full Range as a webinar to the Council of Presidential Awardees in Mathematics.
6 December 2025: I responded to the pundits who claim we teach too much math in a presentation at the Asilomar meeting of the California Math Council. More info.
2 September 2025: I sent out my e-newsletter: a summary of the blog posts and changes to my website in the past seven months. Subscribe!
Henri Picciotto
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
I share instructional materials on my Math Education Page, and my views about math education on this blog.
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.
–Henri
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I do not publish guest posts by people I don’t know, so don’t bother asking.
(I am also involved in word puzzles, especially cryptic crosswords.
More on this.)
Henri's Math Education Blog 