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Catriona Agg @catrionaagg.bsky.social · 1d

I thought Y7 might need a warm up to the task in the first picture, so I modelled a couple and got them to try their own numbers on MWB. Brilliantly, someone happened to get 23, 24 and 23. After such a near miss they were all very motivated to try and get a perfect triplet! #MathsToday

Try different values of a and b.
For each set, can you make the values of the expressions the same?

1)
3a + 5
4(b + 1)
8a - 5b

2)
a + 3b+2
2a + b
a + b + 10

3)
5b - 3a
2b + 5a
11a - b + 6

Modelled substitution for the first set of three.
First row: a=5, b=2
Second row: a=10, b=1
Third row: a=6, b=5, which gives values of 23,24,23

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Erick Lee @theericklee.bsky.social · 2d

Planning my Halloween jack-o-lantern display. Pretty spooky stuff if you're a math teacher. Do you like just the numbers or the numbers with a creapy smile underneath? (two versions from two different AI image generators). #ITeachMath

6, 7 meme pumpkins created by Google Gemini.

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Erick Lee @theericklee.bsky.social · 3d

Just submitted a session proposal for OAME 2026. Looking forward to this always fantastic conference. #ITeachMath

OAME 2026 Annual Conference @oamelearns.bsky.social · 25d

Apply now to be a presenter at OAME 2026 - Let’s Talk Math. We are looking for diverse session proposals under the following themes:
Let’s talk equity
Let’s talk assessment
Let’s talk technology
Let’s talk content
Let’s talk pedagogy
We would love to have you!!!! bit.ly/callforproposals2026

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Reposted by Erick Lee

Amanda Austin @draustinmaths.com · 3d

New percentages resources from Y9 lessons this week:
✨Mixed percentages fill in the blanks
✨Compound and simple interest fill in the blanks
✨Missing interest rates practice strips
Find them at www.draustinmaths.com/percentages
#UKMathsChat #MathsToday

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Erick Lee @theericklee.bsky.social · 5d

I ❤️ blob.

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Graph Time with Sara and Sean @graphtimesarasean.bsky.social · 5d

How we animate in Desmos, Episode 3 of Graph Time with Sara and Sean is here!

youtu.be/PtrHw9-AFWQ

How we animate in Desmos, Episode 3

YouTube video by Graph Time with Sara & Sean

youtu.be

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MrLevMaths @mrlevmaths.bsky.social · 6d

Did 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

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Erick Lee @theericklee.bsky.social · 7d

Halloween is just around the corner. I made a Halloween treat esti-mystery to share with students. #ITeachMath docs.google.com/presentation...

A 2L bucket is filled with Halloween candy... how many pieces of candy are there?

The first two of six clues are revealed. Clue #1 - the answer is a three digit number. Clue #2 - The answer is an even number.

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Reposted by Erick Lee

OAME 2026 Annual Conference @oamelearns.bsky.social · 25d

Apply now to be a presenter at OAME 2026 - Let’s Talk Math. We are looking for diverse session proposals under the following themes:
Let’s talk equity
Let’s talk assessment
Let’s talk technology
Let’s talk content
Let’s talk pedagogy
We would love to have you!!!! bit.ly/callforproposals2026

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Erick Lee @theericklee.bsky.social · 8d

Has rotational or reflective symmetry. Concave/convex. All straight sides (polygon) or non-straight sides (eg circle).

4

Reposted by Erick Lee

Desmos Studio @desmos.com · 8d

We know ball. And okhsv, oklab, and oklch. 🎨

📝 Learn more about new custom color functions in the Desmos Help Center: help.desmos.com/hc/en-us/art...

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Erick Lee @theericklee.bsky.social · 9d

An engaging narrative. Check out this review. aperiodical.com/2025/08/revi...

aperiodical.com

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Mike Jacobs @mikejacobs.bsky.social · 10d

Start your week with this #yohaku. Fill in cells with 9 different factors of 198 to get totals shown in each row/column. #mathsky #iTeachMath

Use 9 different factors of 198 in a 3 by 3 grid. The numbers in the top row add to 39. The numbers in the middle row add to 119. The numbers in the bottom row add to 13. The numbers in the left column add to 14. The numbers in the middle column add to 33. The numbers in the right column add to 124.

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DavidPetro314 @davidpetro314.bsky.social · 10d

[New Post] Ontario Math Links-My favourite #math related links from this week:

ontariomath.blogspot.com/2025/10/math...

Links&help from @howiehua.bsky.social @karencampe.bsky.social @quantamagazine.bsky.social @dawndelvecchio.bsky.social @calarmstrong.bsky.social &more #MathChat #MTBoS #iTeachMath

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Amanda Austin @draustinmaths.com · 10d

✨New A-level resources from this week's Year 12 lessons on graphical inequalities, algebraic fractions and algebraic division. The new A-level section is slowly growing! www.draustinmaths.com/a-level
#MathsToday #ALevelMaths #UKMathsChat

A-level Maths task on finding the remainder when dividing a polynomial by a linear expression using algebraic long division.

A-level Maths task on shading regions in two dimensions divided by linear and quadratic inequalities.

$A-level Maths tasks on (i) solving linear and quadratic inequalities graphically, and (ii) simplifying algebraic fractions either by splitting the fraction or by factorising.$

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Tommaths (he/him) 🏳️‍🌈🏳️‍⚧️ @teakayb.mathsy.space · 14d

A quick bit of #Maths in #Museums: The shape of castles and their keeps and towers.

tommaths.blogspot.com/2025/10/math...

#MathsToday #MuseumEd

tommaths.blogspot.com

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Karen Campe @karencampe.bsky.social · 15d

October is here & so is the next month's #ProblemSolving calendar!

Share your thinking (& your students' thinking) here or on the post.
#MTBoS #iTeachMath #T3Learns #RecreationalMath #MathsToday

karendcampe.wordpress.com/2025/10/01/o...

October Calendar Problems

October is here, and with it the crisp fall air here in the northeast US. No matter where you are, you can get a breath of fresh air with some problem solving in your math classes! Here is the 2015…

karendcampe.wordpress.com

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Miss Morris @morrismaths359.bsky.social · 16d

#Mathstoday
Year 10 found expressions for shaded areas.
Made this last year for an extension but it was nice spending a bit longer on it.

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DavidPetro314 @davidpetro314.bsky.social · 17d

[New Post] Ontario Math Links - My favourite #math related links from this week:

ontariomath.blogspot.com/2025/09/math...

Links and help from @diffgeom.com @robertkaplinsky.com @howiehua.bsky.social @edutopia.org @jennalaib.bsky.social and more #MathChat #MTBoS #iTeachMath

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Daniel Wilson @helsig.bsky.social · 18d

I was calling this geometric fade but I learned it is actually called parquet deformation.

A parquet deformation based on squares. Created in Excel and Krita.

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transum.bsky.social @transum.bsky.social · 18d

There are over 1500 distinct activities on the Transum Mathematics web site. However you'll be pleased to know that there is a search page. It's not AI so works best when you use just one or two words.

www.transum.org/Search_Form....

Hope you find what you need.

#maths #mathschat #mathstoday

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Marco @malmeida.bsky.social · 19d

This is always a fun day in precalc - lots of friendly arguments

Series of questions on domains of various functions

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Erick Lee @theericklee.bsky.social · 20d

Created a binary number esti-mystery. Students practicing powers by working with binary and base 10 number conversions. The final clue is a bit of a giveaway. Check out this site for lots of examples: stevewyborney.com/category/est... #ITeachMath #MathsToday

A box of marbles. Students estimate the number of marbles with binary numbers. 5 clues are given, one at a time, for students to revise their estimate.

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Howie Hua @howiehua.bsky.social · 22d

Would you rather have $200 or a stack of quarters as tall as you?

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Erick Lee @theericklee.bsky.social · 23d

Measurements taken. Happy Equinox!

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