Henri Picciotto
@hpicciotto.bsky.social
Retired after 42 years in the classroom, from counting to calculus. Now working with colleagues, curriculum, cryptic crosswords.
New post, responding to @mpershan and @Mathforlove : Makeover or Heart Transplant? blog.mathed.page/2026/08/24/m... #mtbos #iteachmath #mathed
Makeover or Heart Transplant?
For several years, I was quite active on Twitter. What got me to stick with it (until its takeover) was that it was a good place to discuss math teaching with like-minded educators. In fact, it was…
blog.mathed.page
Wisdom from @hpicciotto.bsky.social on makeover vs transplant, responding to @mpershan.bsky.social and @mathforlove.bsky.social blog.mathed.page/2026/08/24/m... #mtbos #iteachmath
Makeover or Heart Transplant?
For several years, I was quite active on Twitter. What got me to stick with it (until its takeover) was that it was a good place to discuss math teaching with like-minded educators. In fact, it was…
blog.mathed.page
Guest post by Liz Caffrey: how one middle school handles AI blog.mathed.page/2026/08/19/t... #mtbos #iteachmath #mathed
Teaching Math in the Age of AI
This is a guest post by Liz Caffrey, a former mentee and colleague, now a master middle school teacher near Boston. I’ll link to her previous blog contributions at the end. — Henri Teaching M…
blog.mathed.page
New issue of my occasional newsletter: www.mathed.page/newsletter/2... Great Lessons A Teacher's Journey Reaching Consensus Plus links to popular pages on my site. #mtbos #iteachmath #mathed
July 2026 Newsletter | www.MathEd.page
Henri Picciotto's math education news
mathed.page
New post: I quote @mpershan.bsky.social extensively, and insert links and comments. Designing Great Lessons: blog.mathed.page/2026/07/12/d... #mtbos #iteachmath #mathed
Designing Great Lessons
Michael Pershan teaches math in elementary, middle, and high school. He is a bit of a celebrity in some online circles as a thoughtful writer about math education. He deserves his fame, because his…
blog.mathed.page
pershmail.substack.com/p/how-henri-... @mpershan.bsky.social wrote an embarrassingly enthusiastic post about my curriculum development efforts. I blush! #mtbos #iteachmath #mathed
How Henri Picciotto Designs Great Lessons
Learning from one of the best to ever do it.
pershmail.substack.com
I wrote about how @hpicciotto.bsky.social makes such wonderful (and useful) mathematical activities. substack.com/home/post/p-...
How Henri Picciotto Designs Great Lessons
Learning from one of the best to ever do it.
substack.com
Reposting (I had forgotten the hashtags) A Teacher’s 12-year Journey: Marcus Elbel shares how curriculum and ideas from www.mathed.page helped improve his students’ engagement and learning. blog.mathed.page/2026/06/18/a... #mtbos #iteachmath #mathed
A Teacher’s Journey
A Teacher’s Journey by Marcus Elbel I just finished my 12th year of teaching high school mathematics at the school I graduated from in 2010, Chambersburg Area Senior High School. It has been quite …
blog.mathed.page
A Teacher’s 12-year Journey: Marcus Elbel shares how curriculum and ideas from www.mathed.page helped improve his students’ engagement and learning. blog.mathed.page/2026/06/18/a...
A Teacher’s Journey
A Teacher’s Journey by Marcus Elbel I just finished my 12th year of teaching high school mathematics at the school I graduated from in 2010, Chambersburg Area Senior High School. It has been quite …
blog.mathed.page
Reaching Consensus on curricular and pedagogical matters can improve the effectiveness of a math department and improve student learning. I suggest a pathway in this post. blog.mathed.page/2026/06/05/r... #mtbos #iteachmath #mathed
Reaching Consensus
I worked in a high school for many years. Over time, my department reached a close consensus on curricular and pedagogical matters. One administrator, after visiting some math classes, expressed am…
blog.mathed.page
New issue of my newsletter: thinking classrooms, coaching, functions and rate of change. www.mathed.page/newsletter/2... #mtbos #iteachmath #mathed
May 2026 Newsletter | www.MathEd.page
Henri Picciotto's math education news
mathed.page
Guest blog post by Prof. Amanda Cangelosi: Two Math Education Books. She argues that my There Is No One Way to Teach Math complements Liljedahl's Building Thinking Classrooms. blog.mathed.page/2026/03/03/t... #mtbos #iteachmath #mathed
Possibly useful for π day Circle area (animation) www.mathed.page/construction... Leonardo's Areas www.mathed.page/puzzles/poly... π for regular polygons? www.mathed.page/geometry-lab... Taxicab π: www.mathed.page/geometry-lab... #mtbos #iteachmath #mathed
Pi | www.MathEd.page
A visual justification of the formula for area of a circle
mathed.page
Ten approaches to slope! There is no one way. blog.mathed.page/2026/01/23/r... My response to an insightful post by Dan Meyer. #mtbos #iteachmath #mathed
Rate of Change: No One Way!
Many good teachers end up leaving the profession for a variety of reasons, often after only a few years in the classroom. Part of it, surely, is how teachers are treated in the US, as shown in Punc…
blog.mathed.page
Info about my book about math pedagogy (There Is No One Way to Teach Math — with Robin Pemantle), including a 20% discount until March 31: www.mathed.page/teaching/no-... The book addresses just about every aspect of the job, avoids oversimplifying, and suggests discussion questions for departments.
Unexpected ratio: blog.mathed.page/2013/10/30/u... @johngolden.bsky.social #mtbos #iteachmath #mathed
Unexpected ratio
Triangle ABC is equilateral. MA/ME is the golden ratio! (George Hart showed me this result some time ago.)Vynce Montgomery pointed out that therefore, this could be a way to construct a pentagram. …
blog.mathed.page
The publisher of the Lab Gear materials posted an excerpt from my book on their blog: www.didax.com/blog/making-... #mtbos #iteachmath #mathed
Making Algebra Click Using Manipulatives
Manipulatives Make Algebra Learning Concrete for Upper Levels Every middle school math classroom presents a unique set of opportunities and challenges. Students arrive with solid arithmetic skills bu...
didax.com
Some pundits (and some colleagues) claim we teach too much math. How do we respond? I'll share some thoughts at the CMC-North conference in Asilomar. Algebra and Geometry for All Students! December 6, 9:20am I hope to see some of you there! #mtbos #iteachmath #mathed #cmc-north #asilomar
Always of interest! As much time as I've spent on your mathed.page there's always new-to-me stuff! I think I should be able to turn the geometric info into algebraic, just have never figured it out. Feel free to add my applet to your links if it's of interest.
Looking forward to trying out this series of lessons with my math club. www.mathed.page/puzzles/maps/ Thank you, @hpicciotto.bsky.social , for your amazing lessons! #MTBoS #MathsToday #ITeachMath
Map Coloring | www.MathEd.page
An introduction to map coloring, leading to a 'two-color theorem', and providing a possible first activity in graph theory for a high school discrete math class.
mathed.page
Letter from a Homeschooling Mom who finds that my approach to curriculum works best with her son — going from specifics to generalizations, and from the informal to the symbolic, with problem solving and visual representations throughout. blog.mathed.page/2025/10/15/l... #mtbos #iteachmath #mathed
Letter from a Homeschooling Mom
Today, another guest post, this time from a homeschooling mom. — Henri Algebra and Geometry Greetings! I hope this email finds you well. I know you don’t know us, but I wanted to personally…
blog.mathed.page
Recognizing functions: from graphs, from tables, from geometry, from experiments, from function diagrams. Free curriculum materials: www.mathed.page/recognizing.... #mtbos #iteachmath #mathed
Recognizing Functions | www.MathEd.page
Links to lessons and activities about recognizing functions from data points or function diagrams, grades 7-11
mathed.page
Mentoring and Coaching: a guest post by Margot Schou about how we transmit teacher know-how to the next generation. blog.mathed.page/2025/10/01/m... #mtbos #iteachmath #mathed
Mentoring and Coaching
Today, I share a guest post by Margot Schou, who I had the good fortune of mentoring at the start of her career. With her permission, I inserted footnotes with links to some relevant further readin…
blog.mathed.page
A naked-eye astronomy unit for grades 4-12 I developed back in the 1970's. www.mathed.page/look/ It was written on an antediluvian computer and hand-illustrated, but it's free! #mtbos #iteachmath #mathed
Look, Up in the Sky! | www.MathEd.page
A hands-on, eyes-open introduction to the solar system for students in middle and high school.
mathed.page
New issue of my newsletter: www.mathed.page/newsletter/2... Interdisciplinary learning, habits of mind, story tables, plus lots of links. Subscribe! www.mathed.page/e-list.html #mtbos #iteachmath #mathed
September 2025 Newsletter | www.MathEd.page
Henri Picciotto's math education news
mathed.page
Guest post by Frank Cassano and Anya Sturm: how to seamlessly integrate argumentation in curriculum and assessment. blog.mathed.page/2025/08/06/i... #mtbos #iteachmath #mathed
