With the end of the summer approaching, as I am preparing for my fall classes, I found this note I wrote to myself back in June. Good job, me.
Erick Lee
@theericklee.bsky.social
High School Math Teacher | Desmos Fellow | Nova Scotia Math Teachers Assn President. #ITeachMath. I occasionally blog about math at https://pbbmath.weebly.com/
NEW BLOG POST Nmbr 9: Opportunities to Observe and Nudge Student Thinking While Playing Games What a commercial game (Nmbr 9) revealed about my daughter's mathematical thinking — and how playing "just for fun" led us into a larger mathematical conversation. Link below:
Nmbr 9: Opportunities to Observe and Nudge Thinking While Playing Games
During the school year, I spend time thinking about math games for the classroom. Most often, I'm thinking content first. I adapt games with structures I love, like Number Boxes, to highlight different ideas or flex different skills. These games serve many purposes -- learn more about student thinking, develop mathematical reasoning and strategies, exercise social skills -- but the primary function is curricular.
jennalaib.com
Hot off the heels of my last blog post, I read the coverage of last week's Fields Medallists. As usual, I wasn't looking for what they had done, but how they had done it. Read here: https://amiealbrecht.com/2026/07/28/play-is-not-the-opposite-of-ambition/
Play is not the opposite of ambition
I read the coverage of last week’s Fields Medallists, looking to understand how they work.
amiealbrecht.com
You aren't imagining things. After more than 18 months, it's a new post on my blog! Are play and work really opposites? I read Dewey's century-old chapter 'Play and Work in the Curriculum'. The answer may not surprise you … https://amiealbrecht.com/2026/07/23/dewey-on-play-and-work/
Blog post about a lesson I loved this week, inspired by graphing stories mathhombre.blogspot.com/2026/07/math... #iteachmath
Math Performances
I'm teaching a summer algebra course for incoming students. It's our intermediate algebra course stretched to two semesters, my first time ...
mathhombre.blogspot.com
⏰Starting next week: The highly anticipated MTLT Virtual Writing Boot Camp! ️Participate in an intense, one-week writing experience that will support you toward publication in MTLT. Sign up here: nctm.link/VQ6bF
[New Post] Ontario Math Links - My favourite #math links from this week: ontariomath.blogspot.com/2026/07/math... Links and help from @davidkbutler.bsky.social @howiehua.bsky.social @transum.bsky.social @camatsumoto10.bsky.social @teacher2teacher.bsky.social and more #MathChat #MTBoS #iTeachMath
I won’t be at Bridges Math conference, but my hand embroidered Lorenz Attractor will be! #ThreadedTheorems used my photo in their paper. Yay! I see @samjshah.bsky.social has his embroidered aperiodic monotile in this paper as well. #mtbos archive.bridgesmathart.org/2026/bridges...
archive.bridgesmathart.org
A new post on a puzzle coming out in a puzzle book from Natural Math. www.fractalkitty.com/moduloku/ @maria-naturalmath.bsky.social #mtbos #modulo #puzzle #moduloku #recurseCenter
Moduloku
Math is wonderful, and there are so many different ways to play and experience it. I enjoy having conversations with other math lovers and sharing ideas, puzzles, pedagogy, and questions. In one of t...
fractalkitty.com
An unsolved problem. Given an m×n map formed of unit squares, with a given Mountain/Valley assignment for every crease, is there a subexponential algorithm to decide if it can be folded to a 1×1 stack of squares? Example: Yes. #MathSky #Mathematics #Geometry #Origami 🧪 cs.smith.edu/~jorourke/Ma...
Saw something recently about AI making an incorrect quadratic graph. Gave me an idea to use AI to create "common sense" check questions. Students often don't check if their answer makes sense. I try to embed this in my teaching, this will help. Started with quadratics #mathstoday shorturl.at/Y7jfq
The website for the 2026 Bridges Conference Exhibition of Mathematical Art, Craft, and Design is now live, featuring the work of more than 150 artists. gallery.bridgesmathart.org/exhibitions/...
I got carried away and made a thing... Testers welcome! #alevelmaths #mathstoday #alevelrevision #mathsrevision
The more you stare at this, the worse it gets. Going to ask students how many faults they can find with it!
I finally took some time to add submitted images to the Number Talk Images website. Check them out on the Photos page. ntimages.weebly.com
Doing a test experiment on today's solstice...results to follow!
A #MathArt project with my #calculus class! A "Riemondrian" art project inspired by @mathzorro.bsky.social. Students used a Riemann Sum to approximate the area under their curve. Then created additional blocks of color using custom color palettes (this one is "Moon Mist"). #ITeachMath #MathsToday
Hi! In July I'm once again running a free online program for K-12 math teachers called "21st century mathematics". Its goal is to help teachers to connect math they teach with some math that has been discovered in the 21st century. Pass it along! Info+register: justinlanier.org/21st-century...
A couple of questions for the final day of my #calculus class. The hexagon question was from a post at the other place by Henk Reuling. I added the square version as a simplified option. #ITeachMath #MathsToday
Are you ready to share that Desmos notebook you've been working on? Learn more about logging in, saving, and previewing your work. What question should we answer next? #mathsky #iteachmath
Happy Birthday to M. C. Escher born on June 17, 1898. It's also World Tessellation Day in honor of Escher's iconic tiling and morphing art. 🧶 Celebrate with knitting patterns inspired by Escher's artwork like these on my tessellation knitting post intheloopknitting.com/escher-knitt...
Tomorrow starts off the last week of my #calculus class. We're starting with this question from @paddymacmahon.com. I'll be interested to see how my students approach the second question. #ITeachMath #MathsToday
Paddy MacMahon@paddymacmahon.com · last yr.#MathsToday #ALevelMaths What's the minimum value of the green area as a varies?
Here's a #Desmos notebook I made to support one of my Algebra 2 lessons next September. I think these will be really useful as "digital manipulatives" that students can play with to build intuition. #EduSky #ITeachMath www.desmos.com/notebook/sya...
1-5 Writing Linear Equations
desmos.com
Let’s suppose you had 7 minutes to address the Modernizing Math Education 9-14 committee. What would you want them to know? #iTeachMath Agenda for June 23: www.nationalacademies.org/cdn/material... Note: only a few on the committee have teaching experience in 9-12, and it’s not recent.
Modernizing Mathematics Education for Grades 9-14
A student’s mathematical education can help advance their future goals for daily life, education, and career, or this experience can pose a significant obstacle to their progress. A consensus committe...
nationalacademies.org
Ralph Pantozzi@mathillustrated.bsky.social · 2mo agoQuestions for my #iTeachMath colleagues regarding the linked project. What does "modernizing" math ed mean to you and the students you work with? What changes in the last decade or decades have proven worthwhile to your students? Which have not? www.nationalacademies.org/projects/DEP...
Did a few review questions as a class with my #calculus students from www.mathmatize.com. A nice way to start the period. Then I gave them a few to try on their own at home. #ITeachMath #MathsToday @mathmatize.bsky.social
![An online calculus practice question from mathmatize.com.
The problem statement reads: "The region enclosed by y = (x^2)/4 and y = 5 - x^2 is rotated about the x-axis. Fill in the blanks to correctly compute the volume of the resulting solid:"
Below the text is an incomplete integral formula:
Volume = Integral from [dashed blank] to [blank] of [blank] dx
At the bottom, a multiple-choice interface for "Blank 1" shows a row of selectable numerical buttons: -4, -2, -1, -1/2, 0, 1, 1/2, 2, and 4. A purple button below reads "CHECK ANSWER" with "3 attempts remain" written underneath.](https://cdn.bsky.app/img/feed_thumbnail/plain/did:plc:fpm7mbu3gmxtohbxgnm52izt/bafkreigxksfrvmexssvx6tybilqtjylwx5xipcpk3acejiauc4d2uxe3x4)
Perfect symmetry! Solved today’s All Ten puzzle with all expressions using the digits 6, 2, 2, 1 in the same order. #ITeachMath beastacademy.com/puzzles/dail...
Erick Lee@theericklee.bsky.social · 3mo agoI enjoyed the symmetry possible in today’s All Ten Puzzle. I wonder if it’s possible to make all 10 solutions with the numbers all in the same order with no parentheses? #ITeachMath beastacademy.com/puzzles/dail...
Did this as a warm-up with my #calculus class today. Some nice discussions, especially regarding area #3. Also asked them to think about the volume of area #4 rotated around the x-axis. #ITeachMath #MathsToday @mrlevmaths.bsky.social
MrLevMaths@mrlevmaths.bsky.social · 10mo agoDid this with my year 13s in #Alevelmaths as a gentle warm up. Getting them to guess what f(x) and g(x) was and to find each area depending on their functions was less gentle! #Mathstoday
