The Three Triangles: some generalizable pedagogical comments about a guided discovery worksheet (a similar triangles proof of the Pythagorean theorem).
Another Use for the Lab Gear: perimeter and surface area problems.
What Belongs in Algebra 2: a report on Gail Burrill’s views, with links to my materials and articles.
Updates to my Math Education Page
I added an explanation of how I use GeoGebra to build applets for the site: Applets: How To.
I added Liz Caffrey’s version of Clock Angles (Lab 1.3 of Geometry Labs). It is geared to younger middle schoolers, so it is highly structured.
I added a guided inquiry worksheet about The Three Triangles proof of the Pythagorean Theorem and linked to teacher notes on this blog.
All Math Education Page Updates
What else is new
22 March 2024: I tweaked and updated Geometric Puzzles Unit, a 2021 post.
6 March 2024: I sent out my e-newsletter: a summary of the blog posts and changes to my website in the past four months. Subscribe!
24 February 2024: I led a session on “Geometric Puzzles” for the Santa Cruz Math Circle eighth graders. Read about various versions of this workshop (for teachers or students) on my Talks page.
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 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I do not publish guest posts by people I don’t know, so don’t bother asking.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 