Erick Lee

Now updated with 1st and 2nd half-lives, theoretical and simulated. Sharing the saved graph in case I make more tweaks later www.desmos.com/calculator/s...

Great to have @gfletchy.bsky.social presenting his keynote session to finish the day at the NS MTA math conference. #NSMTA2026

A fantastic keynote from @themathguru.bsky.social to start the day at the NS MTA conference. #NSMTA2026 @nsmta.bsky.social

The MTA conference is underway! 600+ math teachers gathered to learn, share and grow. #NSMTA2026

When you understand the assignment but do it wrong on purpose out of spite.. 😅

Last week in #MathsToday two activities given to Year 12 as an intro. One from Susan Wall found in the great book "Teaching ALevel Maths" from @susanwhitehouse.bsky.social and @mrsouthernmaths.bsky.social. Second from MEI.

Geometric Shapes / 261018 #p5js #generative #creativecoding

In #mathstoday, year 12 were learning through play with reciprocal trig functions (and a few extras!) #alevelmaths #memorygame

If you are driving to your friend's house at an average speed of 40 mph and you take the same route back at an average speed of 60 mph, what was your overall speed? It is NOT 50 mph. Let's learn about the harmonic mean.

A new blog post, this a guest post. Take a look.

Bring some math into your holiday weekend and learn about some ridiculous, fascinating, and absolutely terrible ways to hang a picture. www.scientificamerican.com/article/math...

I’m a huge fan of the Super Wrong, Kinda Right routine. A meager math problem can nourish a bunch of kids when you ask them what the answer CAN’T be and how they know. practicedrivenpd.com/instructiona...

This is a fun one! If you like Nonagrams/Pic-a-Pix, it's basically an elegant implementation of those.

[New Post] Ontario Math Links - My favourite #math related links from this week: ontariomath.blogspot.com/2026/10/math... Links and help from @karencampe.bsky.social @desmos.com @howiehua.bsky.social @joelbezaire.bsky.social and more #MathChat #MTBoS #iTeachMath

You can finally get your ducks in a row (and column). Type “matrix” in any Desmos graphing tool to get started. Learn more: help.desmos.com/hc/en-us/art... #iteachmath #mathsky #linearalgebra #matrices

Are your students learning about parallel lines and transversals? Try out these two Open Middle problems from Shelli Foust: www.openmiddle.com/parallel... www.openmiddle.com/parallel...

Some math ideas just keep showing up. 👀 This is a neat collection of “Big Ideas” and the connections they make across math. 🔗 multiplicitylab.northwestern.edu/big-ideas/ Anything here spark an idea for your classroom?

A quick recap of solving equations for Year 8 tomorrow. #mathstoday #ukmathsteachers #mathsteachers

Talking with a parent who, in essence, wanted an "i do, we do, you do" teacher centric math class for their kid Reminded me of when i taught AP Calc. I gave a worksheet on the 1st day which basically had them exploring all of conceptual calculus with no instruction drive.google.com/file/d/1U4_w...

[New Post] Ontario Math Links - My favourite #math related links from this week: ontariomath.blogspot.com/2026/09/math... Links and help from @theericklee.bsky.social @howiehua.bsky.social @drrowlandson.bsky.social @nomadpenguin.bsky.social and more #MathChat #MTBoS #iTeachMath

New #SlowRevealGraph: Amount of Sugar in Popular Miniature Chocolate Bars How much sugar is there in a miniature candy bar? Compare different "fun size" bars using a scaled pictograph. Link below:

I got to do some #MathsToday 😁 using this lovely task with new leads of A Level Pedagogy Work Groups. If you teach A Level anywhere in England, I would really encourage you to contact your local Maths Hub and join a Work Group for 3 days of brilliant free CPD.

#Mathstoday My intervention group had a go at the Doughnut Percents Nrich task. Matching up fraction decimals and percentages nrich.maths.org/problems/dou...

www.sciencedaily.com/releases/202... Researchers find a Wordle strategy that wins 99% of the time A mathematical strategy that prioritizes information over lucky guesses can solve Wordle 99% of the time #math #maths #MathSky #MTBoS #iteachmath #Wordle #ShannonEntropy #InformationTheory

Math teacher at the gym... on the eliptical machine listening to New Order's Blue Monday and thinking, "I could re-create this animation on @desmos.com." Here is the result www.desmos.com/calculator/k... #ITeachMath

We're fortunate to have @MikeFlynn55 for our September third Thursday of each month webinar, 9/17, Free Reg and archived sessions: www.cmcmath.org/online-learn... #cmcmath

New blog post - Explores one of my favourite questions to ask after finishing a worked example: What would happen if I changed the question? wp.me/p9t8DE-s8 #mathschat #MTBoS #ukmathschat #iTeachMaths

Listening to the recent ICM panel discussion on 'What Is Math For in the Age of AI?' got me thinking about a much older question. What do we value in learning mathematics? Read my latest blog post here: amiealbrecht.com/2026/09/10/s...

[New Post] Ontario Math Links - My favourite #math related links from this week: ontariomath.blogspot.com/2026/09/math... Links and help from @karencampe.bsky.social @awm-math.org @howiehua.bsky.social @mrcorleymath.bsky.social @johannamath.bsky.social and More #MathChat #MTBoS #iTeachMath

[New Podcast] This episode features @theericklee.bsky.social previewing their Sept 9th @oamecounts.bsky.social FREE webinar "Bigger on the Inside: The Surprising Power of Short Math Routines". More info: talks.oame.on.ca/season-9 #MathChat #MTBoS #iTeachMath

I'm going to run a group - Painting the OEIS. Please share your favorite sequences and why. I'll share what art I do with any of them. #oeis #mtbos #mathArt

MoMath will host a free online event on Friday, Aug 28 at 12:00pm US Eastern time premiering a new video by Sabetta Matsumoto, Tim Reinhardt, Jürgen Richter-Gebert, and me, on hyperboloids made out of sticks and how they move. Details and registration at momath.org/hyperboloids/

#rationalcats what should they name the kitten?

I don’t yet know if this is my new bestie or hilarious campus nemesis. (But seriously, this is cool and I want my next university headshots here)

#TryThisThursday Rather than stressing why one doesn't belong, emphasize what the other three have in common. Discussion is key! Do it for each quadrant! #MathIsFigureOutAble #MTBoS #ITeachMath #MathEd

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.

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:

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/

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

⏰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...

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

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...