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Henri Picciotto's

Math Education Newsletter

September 2024

Northern Californians: I hope to see you at Asilomar, December 7!
Everyone: Check out my book!

(Scroll down for details.)

Hi all,

Before the actual newsletter, I need to get something off my chest.

For almost a year, Israel has been engaged in a campaign to annihilate Gaza and tens of thousands of its inhabitants. This includes the deliberate destruction of the infrastructure that makes life possible: electricity, water, sewage, hospitals, bakeries, farms, mosques, museums, and yes, schools and universities. This is not self-defense, it is a one-sided war on an entire population. Our country is complicit with these crimes: the horrors would have ended long ago if the US had stopped providing military aid and diplomatic cover to Israel.

The war has come home to poison our lives. Expressing concern about an ongoing genocide is grotesquely portrayed as antisemitism. Peace-seeking students are violently attacked, doxxed, and their job offers are rescinded. Jenna Laib, a highly respected math educator in the Boston area, and the curator of the excellent Slow Reveal Graphs website, has recently been vilified for using a graph from the Arab Barometer that included data from Palestine. (The Arab Barometer is a project about opinion polls, involving Princeton and other academic institutions.) As a result, she has had to endure serious threats to her and to her family's safety and wellbeing. This is not acceptable.

And now Israel attacks Lebanon, the country where I grew up. They claim they are committing these atrocities in the name of all Jews. This is guaranteed to generate genuine antisemitism everywhere in the world. As a Jew myself, I cannot remain silent. Here are some resources I use to stay informed:
+972 Magazine (independent journalism from Israel-Palestine)
B'Tselem (Israeli human rights organization)
The UN | Human Rights Watch | Amnesty International
Academics 4 Peace | Mitchell Plitnick | Joel Beinin (analysts)

Believe me, I hate to be forced to start my newsletter this way.

On to math education.

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Blog Posts

Here are links to posts on my Math Education Blog that you might find interesting.
If you are so moved, you may comment on the posts, and/or subscribe to the blog.

Working with Pentominoes

Pentominoes are a geometric puzzle, a staple of recreational mathematics. Since the 1980's, my pentomino puzzles and lessons have provided me with opportunities to reach beyond the walls of own school. My pentomino materials have brought recreational mathematics to thousands of students over more than 40 years, and it's not over yet! This post is an update of a post from 2013, when Didax published my book Working with Pentominoes.

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Can Bots Teach Math?

This is my modest contribution to Dan Meyer's many-year campaign to debunk the ridiculous claims of ed tech fantasists. It is a short piece where I try to get at the reasons why human teachers are necessary. I am not anti-tech, and have been involved with interactive geometry for decades. Nor is Dan, who has worked closely with Desmos. But our approaches are based on the needs of actual students, not the shallow self-serving dreams of CEO's.

Proof in High School

Over the years, I have written much about how to better teach proof as part of a geometry course. In this post, I link to some of those pieces, but I mostly concentrate on a proposal to include proof in high school post-Algebra 2 electives — including proof by contradiction and proof by mathematical induction, neither of which are included in the Common Core State Standards. I have done that effectively for years, and I strongly recommend it.

Practical Strategies
to Reach the Full Range of Students

Asilomar, December 7, 2024

People learn at different rates: all classes are heterogeneous. At the California Math Council conference, I will share manageable ways to differentiate by time, not content, in order to both challenge and support every student: constant forward motion, eternal review, and extended exposure. I hope to see you there!

Much of the talk will be based on ideas from my 43 years in the classroom, and from my new book, There Is No One Way to Teach Math. The book, co-written with Robin Pemantle, covers just about every aspect of our job: pedagogical principles, classroom implementation, and departmental/school context. Read about it on my blog: 1 | 2.

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MathEducation.page

Visit my website!

Stats

In the last three months, these were the most-visited pages on the site:
Virtual Grid Paper
Virtual Pentominoes
Geometry Labs (free book) *
Algebra: Themes, Tools, Concepts (free book) *
Geometric Puzzles *
Virtual Geoboard
For a Tool-Rich Pedagogy *
Virtual Base Ten Blocks
Pentominoes *
Function Diagrams *
Supertangrams *
Pattern Blocks *
Kinesthetics *
Fractions

Tweaks and Updates

Since the last issue of this newsletter, I tweaked and updated these pages (partial list):
Algebra Manipulatives
There Is No One Way
Pent
For Math Circles *
Symmetry *
Math Education Consulting
Space
Electronic Graphing *
Manipulatives *
Some Rights Reserved
Pentomino Books
Teaching *
Tangrams *
Games *

Navigating the Site

There are many excellent one-idea math education websites, but mine is not one of them. The above links only account for perhaps 10% of the articles, curricular materials, and applets I share. Those cover many, many topics of the grades 6-12 math curriculum, some material suitable for grades K-5, much "enrichment" content, and my thoughts about pedagogy. A consequence of this wealth of content is that it may be difficult to find what you're looking for.

Here are some ways to navigate the site:

All those options are available in the navigation bar at the top and bottom of most pages on the site. You should also try clicking the tiny icons at the left and right of that bar. Those are links for:

And two more choices:

  • Many links in this newsletter are to pages which in turn will connect you to relevant pages on the site. They are marked with asterisks. *
  • My new book, There Is No One Way to Teach Math, includes many links to the site. (And many other sites. Those links may be a reason to get the ebook version?)

To subscribe to this newsletter, or to read past issues, click here.

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