Recent Blog Posts

Geometry: A Guided Inquiry: Another book review, this time about the book that had the biggest impact on my teaching and curriculum development, by far.

Every Minute Counts: In which I review a book from 1982 which influenced me as a young teacher, and which still has some worthwhile ideas.

In Defense of Geometry: Part II: More on the shrinkage of geometry, and what I would like to see instead.

Links to all the posts!

Updates to my Math Education Page

Summer Workshops: This is the page about my 2019 summer workshop: Visual Algebra (grades 6-9), in two locations: June in Silicon Valley, August near Boston. I added a link to the participants’ website. I also added mentions of continuing education / graduate school units, and the 75% discount for public school teachers.

I added links to Liz Caffrey’s Desmos versions of Letters and Postcards and Geometry Labs 9.3 and 9,4. I added a note about Geometry Labs 6.1.

Symmetric Polygons: I corrected a mathematical error and expanded the teachers’ notes in this activity for grades 8-10. Co-authored with Lew Douglas.

All Math Education Page Updates

What else is new

18 April 2019: I restored the graphics and repaired the links in my 2011 notes from a meeting of Escape from the Textbook! a grassroots math teacher group that met for a few years in the Bay Area.
(Part 1: tools, backward design | Part 2: Miras | Part 3: habits of mind)

15 March 2019: I sent my e-newsletter out. The main topics were story tables, an argument against the shrinking of geometry, a book review, geoboards + related topics, and the announcement of my summer workshops. Subscribe!

9 January 2019: I will offer a grades 6-9 version of my workshop on Visual Algebra twice this summer: June 25-27 at Synapse School in Silicon Valley, and again August 7-9 at Atrium School near Boston. More information.

Old News

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!

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 on 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.


My Résumé

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.)