Henri Picciotto
@hpicciotto.bsky.social
Retired after 42 years in the classroom, from counting to calculus. Now working with colleagues, curriculum, cryptic crosswords.
The publisher of the Lab Gear materials posted an excerpt from my book on their blog:
www.didax.com/blog/making-...
#mtbos #iteachmath #mathed
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...
www.didax.com
November 20, 2025 at 1:09 AM
The publisher of the Lab Gear materials posted an excerpt from my book on their blog:
www.didax.com/blog/making-...
#mtbos #iteachmath #mathed
www.didax.com/blog/making-...
#mtbos #iteachmath #mathed
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
Algebra and Geometry for All Students!
December 6, 9:20am
I hope to see some of you there!
#mtbos #iteachmath #mathed #cmc-north #asilomar
November 16, 2025 at 12:24 AM
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
Algebra and Geometry for All Students!
December 6, 9:20am
I hope to see some of you there!
#mtbos #iteachmath #mathed #cmc-north #asilomar
Reposted by Henri Picciotto
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.
February 2, 2025 at 7:10 PM
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.
Reposted by Henri Picciotto
Reposted by Henri Picciotto
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
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.
www.mathed.page
March 26, 2025 at 5:00 PM
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
www.mathed.page/puzzles/maps/
Thank you, @hpicciotto.bsky.social , for your amazing lessons!
#MTBoS #MathsToday #ITeachMath
Reposted by Henri Picciotto
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
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
October 17, 2025 at 3:35 PM
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
blog.mathed.page/2025/10/15/l...
#mtbos #iteachmath #mathed
Recognizing functions: from graphs, from tables, from geometry, from experiments, from function diagrams.
Free curriculum materials:
www.mathed.page/recognizing....
#mtbos #iteachmath #mathed
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
www.mathed.page
October 8, 2025 at 10:26 PM
Recognizing functions: from graphs, from tables, from geometry, from experiments, from function diagrams.
Free curriculum materials:
www.mathed.page/recognizing....
#mtbos #iteachmath #mathed
Free curriculum materials:
www.mathed.page/recognizing....
#mtbos #iteachmath #mathed
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
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
October 2, 2025 at 6:12 PM
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
blog.mathed.page/2025/10/01/m...
#mtbos #iteachmath #mathed
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
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.
www.mathed.page
September 12, 2025 at 10:06 PM
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
www.mathed.page/look/
It was written on an antediluvian computer and hand-illustrated, but it's free!
#mtbos #iteachmath #mathed
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
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
www.mathed.page
September 2, 2025 at 9:27 PM
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
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
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
blog.mathed.page/2025/08/06/i...
#mtbos #iteachmath #mathed
August 7, 2025 at 5:18 PM
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
blog.mathed.page/2025/08/06/i...
#mtbos #iteachmath #mathed
Reposted by Henri Picciotto
Recently took a class that deciphered the line work in an Alhambra tiling. I decided to color and weave it, too. Then went looking for a photo of the actual wall. Hard to find! Was so pleased to find a collection taken by @hpicciotto.bsky.social posted on www.mathed.page/symmetry/spa....
August 6, 2025 at 6:26 PM
Recently took a class that deciphered the line work in an Alhambra tiling. I decided to color and weave it, too. Then went looking for a photo of the actual wall. Hard to find! Was so pleased to find a collection taken by @hpicciotto.bsky.social posted on www.mathed.page/symmetry/spa....
→ But now I wonder: is there a box with _two or three_ "pythagorean faces", _and_ a whole-number long diagonal? I haven't been able to find one. But to be honest, I probably didn't put enough time and energy into it. If you find such a box, let me know!
June 2, 2025 at 10:28 PM
→ But now I wonder: is there a box with _two or three_ "pythagorean faces", _and_ a whole-number long diagonal? I haven't been able to find one. But to be honest, I probably didn't put enough time and energy into it. If you find such a box, let me know!
During a bout of insomnia, I asked myself: what should the height of a box with base 3 by 4 be, so that its long (internal) diagonal is a whole number? I found an answer, and in the morning was able to generalize it into a way to get a pythagorean quadruple from any triple. →
June 2, 2025 at 10:24 PM
During a bout of insomnia, I asked myself: what should the height of a box with base 3 by 4 be, so that its long (internal) diagonal is a whole number? I found an answer, and in the morning was able to generalize it into a way to get a pythagorean quadruple from any triple. →
Integrating Problem Solving Seamlessly: A guest post by by Frank Cassano and Anya Sturm.
www.mathed.page/teaching/ful...
#mtbos #iteachmath #mathed
www.mathed.page/teaching/ful...
#mtbos #iteachmath #mathed
May 28, 2025 at 9:25 PM
Integrating Problem Solving Seamlessly: A guest post by by Frank Cassano and Anya Sturm.
www.mathed.page/teaching/ful...
#mtbos #iteachmath #mathed
www.mathed.page/teaching/ful...
#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
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
www.mathed.page
March 3, 2025 at 4:32 PM
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
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
New post: Making Connections, disciplinary learning, Math and Art.
blog.mathed.page/2025/02/28/m...
#mtbos #iteachmath #mathed
blog.mathed.page/2025/02/28/m...
#mtbos #iteachmath #mathed
March 2, 2025 at 6:16 PM
New post: Making Connections, disciplinary learning, Math and Art.
blog.mathed.page/2025/02/28/m...
#mtbos #iteachmath #mathed
blog.mathed.page/2025/02/28/m...
#mtbos #iteachmath #mathed
I added teacher notes to "Leonardo's Areas", in (plenty of) time for π day.
www.mathed.page/puzzles/poly...
#mtbos #iteachmath #mathed
www.mathed.page/puzzles/poly...
#mtbos #iteachmath #mathed
February 18, 2025 at 10:27 PM
I added teacher notes to "Leonardo's Areas", in (plenty of) time for π day.
www.mathed.page/puzzles/poly...
#mtbos #iteachmath #mathed
www.mathed.page/puzzles/poly...
#mtbos #iteachmath #mathed
New on my website: Squaring Pentominoes, a dissection puzzle set using one-inch graph paper and scissors
www.mathed.page/puzzles/squa...
(Stealth application of the Pythagorean theorem.)
#mtbos #iteachmath #mathed
www.mathed.page/puzzles/squa...
(Stealth application of the Pythagorean theorem.)
#mtbos #iteachmath #mathed
February 17, 2025 at 5:00 PM
New on my website: Squaring Pentominoes, a dissection puzzle set using one-inch graph paper and scissors
www.mathed.page/puzzles/squa...
(Stealth application of the Pythagorean theorem.)
#mtbos #iteachmath #mathed
www.mathed.page/puzzles/squa...
(Stealth application of the Pythagorean theorem.)
#mtbos #iteachmath #mathed
New issue of my math education newsletter: Productive Struggle, π Day, Function Diagrams, Geometric Puzzles
www.mathed.page/newsletter/2...
Subscribe!
www.mathed.page/e-list.html
#mtbos #iteachmath #mathed
www.mathed.page/newsletter/2...
Subscribe!
www.mathed.page/e-list.html
#mtbos #iteachmath #mathed
February 2025 Newsletter | www.MathEducation.page
Henri Picciotto's math education news
www.mathed.page
February 14, 2025 at 7:18 PM
New issue of my math education newsletter: Productive Struggle, π Day, Function Diagrams, Geometric Puzzles
www.mathed.page/newsletter/2...
Subscribe!
www.mathed.page/e-list.html
#mtbos #iteachmath #mathed
www.mathed.page/newsletter/2...
Subscribe!
www.mathed.page/e-list.html
#mtbos #iteachmath #mathed
Possibly useful for Valentine's Day: Katherine Pauer's "Cutting Out Hearts"
www.mathed.page/puzzles/hear...
#mtbos #iteachmath #mathed
www.mathed.page/puzzles/hear...
#mtbos #iteachmath #mathed
February 1, 2025 at 5:08 PM
Possibly useful for Valentine's Day: Katherine Pauer's "Cutting Out Hearts"
www.mathed.page/puzzles/hear...
#mtbos #iteachmath #mathed
www.mathed.page/puzzles/hear...
#mtbos #iteachmath #mathed
Perspective Lab | www.MathEd.page
A lab on perspective, leading to an inverse variation formula
www.mathed.page
February 1, 2025 at 5:07 AM
Reposted by Henri Picciotto
@joshuakosman.bsky.social and @hpicciotto.bsky.social took their weekly cryptic crosswords from The Nation to Patreon a few years ago, and you can find them at www.patreon.com/c/leftfieldc...
Get more from Out of Left Field on Patreon
Creating Cryptic Crosswords
www.patreon.com
December 20, 2024 at 9:51 PM
@joshuakosman.bsky.social and @hpicciotto.bsky.social took their weekly cryptic crosswords from The Nation to Patreon a few years ago, and you can find them at www.patreon.com/c/leftfieldc...