Recent Blog Posts

Teaching Trig: a summary of my ex-department’s approach to the subject, with a special emphasis on the initial introduction of these concepts.

Asilomar Notes: Story Tables: A session where I learned about a phenomenally powerful tool to teach about functions.

Asilomar Notes: Tech: Two interesting sessions involving the use of technology in the teaching of math. Read my notes and reactions.

Links to all the posts!

Updates to my Math Education Page

Summer Workshops: I set up that page to announce my 2019 summer workshops: Visual Algebra (grades 6-9), in two locations.

Soccer Angles: I added interactive GeoGebra applets to this page, which is an extension of the low-tech Lab with the same name in Geometry Labs.

Spirograph Simulation: For some reason, while the online applet worked, the GeoGebra file I included did not open when downloaded. I got some help on Twitter, and posted a corrected version.

All Math Education Page Updates

What else is new

14 January 2019: I restored five posts about the geoboard: Geoboard Triangles, No Three on a Line, Heilbronn’s Triangle, Ariadne’s String, and Geoboard Problems for Teachers.

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 in Boston. I will post more information here as it becomes available.

9 January 2019: I restored the graphics in two posts: “A New Algebra” where I bragged about Robert Davis’s praise for my approach; and Geoboards and Dot Paper, where I introduced subsequent posts on using these tools as a microworld for problem solving, and bragged about having invented the “tilted squares” intro to the Pythagorean theorem decades ago.

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.)