Erick Lee's Avatar

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/

621 Followers  |  378 Following  |  235 Posts  |  Joined: 11.11.2024  |  1.8413

Latest posts by theericklee.bsky.social on Bluesky

New project #mathcrochet hexaflexagon #mathplay #iteachmath #MathPhoto25 #hexagon #shapes

31.07.2025 01:40 โ€” ๐Ÿ‘ 6    ๐Ÿ” 1    ๐Ÿ’ฌ 0    ๐Ÿ“Œ 0
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Thanks to all the participants in my Rich Task and AI Workshop today at #ITCamp2025. So much wonderful learning! @wipebook.bsky.social #hrcemath

30.07.2025 18:31 โ€” ๐Ÿ‘ 5    ๐Ÿ” 2    ๐Ÿ’ฌ 0    ๐Ÿ“Œ 0

I love the look of your cookie game! My son has been doing a lot of crocheting this summer.

27.07.2025 11:59 โ€” ๐Ÿ‘ 1    ๐Ÿ” 0    ๐Ÿ’ฌ 1    ๐Ÿ“Œ 0
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#MathPlay ๐Ÿงฎ from the Math Play headquarters ๐Ÿ˜Š๐Ÿคธโ€โ™€๏ธ๐ŸŽฒโœ–๏ธ

#MathPhoto25 #ITeachMath #MTBoS #MathSky #MathsToday #EduSky #STEM #Math #Maths

26.07.2025 11:33 โ€” ๐Ÿ‘ 6    ๐Ÿ” 3    ๐Ÿ’ฌ 0    ๐Ÿ“Œ 0
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CALLING ALL CROCHET GEEKS AND GRANNIES

Do you want to crochet something that ends up in a mathematical art exhibit in Paris* next summer? Join the project at www.grannylifecrochet.com

* We will find out in September if the project makes it into the Paris exhibit

16.07.2025 15:58 โ€” ๐Ÿ‘ 46    ๐Ÿ” 35    ๐Ÿ’ฌ 5    ๐Ÿ“Œ 4
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Leaving London via Paddington Station, the clock face on Big Ben and the London Eye #circles #MathPhoto25 #ITeachMath #MTBoS

25.07.2025 02:23 โ€” ๐Ÿ‘ 11    ๐Ÿ” 1    ๐Ÿ’ฌ 2    ๐Ÿ“Œ 0
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All eight weeks of #MathPHoto25. Feel free to continue posting through the summer with any of the prompts (or combinations of prompts) you notice!

24.07.2025 20:59 โ€” ๐Ÿ‘ 6    ๐Ÿ” 3    ๐Ÿ’ฌ 0    ๐Ÿ“Œ 1
Three examples of math at play... a game of cribbage, playing with electronic circuits, and playing the board game Alhambra.

Three examples of math at play... a game of cribbage, playing with electronic circuits, and playing the board game Alhambra.

It is the final week of #MathPhoto25. This week look for math at play. Where do you notice mathematics in games and activities. #MathPlay #ITeachMath

24.07.2025 20:57 โ€” ๐Ÿ‘ 13    ๐Ÿ” 7    ๐Ÿ’ฌ 4    ๐Ÿ“Œ 0
A diagram of a right triangle with legs of 7 and 24 and a hypotenuse of 25.

A diagram of a right triangle with legs of 7 and 24 and a hypotenuse of 25.

Happy Pythagorean Triple Day to all who celebrate!

24.07.2025 17:39 โ€” ๐Ÿ‘ 30    ๐Ÿ” 10    ๐Ÿ’ฌ 2    ๐Ÿ“Œ 1
A pinkish-red triangle pendant with glass dots that have a slight metallic blue sheen to them. It has a silver bail and is laying on a light wooden table.

A pinkish-red triangle pendant with glass dots that have a slight metallic blue sheen to them. It has a silver bail and is laying on a light wooden table.

For #mathphoto25 #circles (or #spheres) and #WackyWednesadayArt and #coloraday #redWed hereโ€™s a #fusedglass pendant I made (and am reposting).
I made the round dots using #dichro.
#glassart #EastCoastKin #art #artyear

23.07.2025 19:19 โ€” ๐Ÿ‘ 30    ๐Ÿ” 4    ๐Ÿ’ฌ 1    ๐Ÿ“Œ 0
Nonagon - They Might Be Giants | TMBG
YouTube video by TMBGkids Nonagon - They Might Be Giants | TMBG

When I read your sign, They Might Be Giants plays in my head. youtu.be/z5m8BWk5LoQ?...

24.07.2025 00:04 โ€” ๐Ÿ‘ 2    ๐Ÿ” 0    ๐Ÿ’ฌ 1    ๐Ÿ“Œ 0

A very solid selection.

23.07.2025 21:12 โ€” ๐Ÿ‘ 2    ๐Ÿ” 0    ๐Ÿ’ฌ 1    ๐Ÿ“Œ 0
Graphic showing different dollar amounts for different sโ€™mores ingredient options.

Graphic showing different dollar amounts for different sโ€™mores ingredient options.

Saw this on FB and thought it would make a good math warm-up or Math Talk

What would you pick? ๐Ÿซ๐Ÿ”ฅ

23.07.2025 20:55 โ€” ๐Ÿ‘ 25    ๐Ÿ” 7    ๐Ÿ’ฌ 12    ๐Ÿ“Œ 1

Next step is to design something myself instead of just printing something from Thingiverse.

22.07.2025 14:04 โ€” ๐Ÿ‘ 1    ๐Ÿ” 0    ๐Ÿ’ฌ 0    ๐Ÿ“Œ 0
12 pencils arranged on a circular base to form a hyperboloid.

12 pencils arranged on a circular base to form a hyperboloid.

3D printing in progress.

3D printing in progress.

My first 3D print! Started with a hyperboloid pencil holder for some vintage Canadian pencils. #circles #MathPhoto25 @edtechcocek.bsky.social en.m.wikipedia.org/wiki/Hyperbo...

22.07.2025 03:38 โ€” ๐Ÿ‘ 10    ๐Ÿ” 1    ๐Ÿ’ฌ 1    ๐Ÿ“Œ 0
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This was a hard #circle picture to get. Spiders are such geometry enthusiasts #mathphoto25

21.07.2025 17:54 โ€” ๐Ÿ‘ 36    ๐Ÿ” 1    ๐Ÿ’ฌ 1    ๐Ÿ“Œ 1

A colander #MathPhoto25 #circles #ITeachMath

21.07.2025 16:02 โ€” ๐Ÿ‘ 7    ๐Ÿ” 1    ๐Ÿ’ฌ 0    ๐Ÿ“Œ 0
Macro of a pinkish purple flower right after it rained. There are several perfect circles of water drops on it. There is greenery in the background. This was Central Park NYC

Macro of a pinkish purple flower right after it rained. There are several perfect circles of water drops on it. There is greenery in the background. This was Central Park NYC

Perfect tiny #Circlesย 

#ColorADay #PinkMon #MacroMonday #MinimalMonday
#Pleasure #JuliArty #smArtist #BloomScrolling #Macro #Flowers #DailyFlowers #TheLittleThings #OnlyBeautifulThings #MathPhoto25 #EastCoastKin #Photography #NaturePhotography #MobilePhotography #NYCPhotography

21.07.2025 12:29 โ€” ๐Ÿ‘ 120    ๐Ÿ” 8    ๐Ÿ’ฌ 3    ๐Ÿ“Œ 1
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[New Post] Ontario Math Links-My favourite #math related links from this week:

ontariomath.blogspot.com/2025/07/math...

Links & help from @jennalaib.bsky.social @howiehua.bsky.social @kurt-salisbury.bsky.social @dwekselgreene.bsky.social @theericklee.bsky.social & more
#MathChat #MTBoS #iTeachMath

20.07.2025 19:49 โ€” ๐Ÿ‘ 11    ๐Ÿ” 4    ๐Ÿ’ฌ 1    ๐Ÿ“Œ 1

#MathPhoto25 #circles #ITeachMath #RoyalAcademy #RyanGander

20.07.2025 18:13 โ€” ๐Ÿ‘ 7    ๐Ÿ” 1    ๐Ÿ’ฌ 0    ๐Ÿ“Œ 0
The train wheel from a caboose.

The train wheel from a caboose.

A close up look at the wheel from a caboose.

A close up look at the wheel from a caboose.

Train wheel #circlesโ€ฆ are actually somewhat conical. The science of the shape of a train wheel is surprisingly complex. #MathPhoto25 www.scientificamerican.com/article/trai...

20.07.2025 13:51 โ€” ๐Ÿ‘ 1    ๐Ÿ” 1    ๐Ÿ’ฌ 0    ๐Ÿ“Œ 0
Highly symmetric old brick building with a clock.

Highly symmetric old brick building with a clock.

I believe this civic building in Nuenen in the Netherlands responds to the first seven #MathPhoto25 prompts. #five#symmetry #squares #even #circles#measurement#angles

19.07.2025 07:37 โ€” ๐Ÿ‘ 2    ๐Ÿ” 1    ๐Ÿ’ฌ 0    ๐Ÿ“Œ 0

#MathPhoto25

19.07.2025 18:03 โ€” ๐Ÿ‘ 3    ๐Ÿ” 2    ๐Ÿ’ฌ 0    ๐Ÿ“Œ 0
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One of my favorite #circles โญ• via @desmos.com in the context of #MathPlay ๐Ÿงฎ

#MathPhoto25 #ITeachMath #MTBoS #MathSky #MathsToday #EduSky #STEM #Math #EdTech #EdChat

19.07.2025 18:35 โ€” ๐Ÿ‘ 4    ๐Ÿ” 2    ๐Ÿ’ฌ 0    ๐Ÿ“Œ 0
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These ones are also from Japan and remind me of daleks in Doctor Who. #circles #MathPhoto25.

18.07.2025 20:55 โ€” ๐Ÿ‘ 10    ๐Ÿ” 1    ๐Ÿ’ฌ 1    ๐Ÿ“Œ 0
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Manhole covers are some of my favourite #circles found in the built environs. A ๐Ÿงต for #MathPhoto25.

In Matsumoto, Japan. This shows temari balls which are made by winding colored threads of silk to create various shapes and patterns.

18.07.2025 20:55 โ€” ๐Ÿ‘ 11    ๐Ÿ” 1    ๐Ÿ’ฌ 2    ๐Ÿ“Œ 0
A bike lane pavement marking as seen by an approaching cyclist.

A bike lane pavement marking as seen by an approaching cyclist.

A bike lane pavement marking as seen by a pedestrian walking by.

A bike lane pavement marking as seen by a pedestrian walking by.

A bike lane pavement marking. #circles from fad away but ellipses from close up. The magic of perspective. #MathPhoto25

18.07.2025 18:41 โ€” ๐Ÿ‘ 4    ๐Ÿ” 1    ๐Ÿ’ฌ 0    ๐Ÿ“Œ 0
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#circles put together to form a sphere. #MathPhoto25. I walked past these this evening, but the photo is from six years ago.

18.07.2025 11:33 โ€” ๐Ÿ‘ 9    ๐Ÿ” 2    ๐Ÿ’ฌ 0    ๐Ÿ“Œ 0
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More #circles put together to form a sphere, this time in Marrakech a couple of years ago. #MathPhoto25.

18.07.2025 11:34 โ€” ๐Ÿ‘ 18    ๐Ÿ” 3    ๐Ÿ’ฌ 0    ๐Ÿ“Œ 0
A round clock on a pole  in an outdoor courtyard showing the time 8:33.

A round clock on a pole in an outdoor courtyard showing the time 8:33.

This clock has a #circle face, hands creating an #angle and time as a #measure of how much of the day is completed. #MathPhoto25

17.07.2025 18:58 โ€” ๐Ÿ‘ 3    ๐Ÿ” 0    ๐Ÿ’ฌ 0    ๐Ÿ“Œ 0

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