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/
An origami poppy flower for Remembrance Day. share.google/wlcoGv9bc4SO...
November 9, 2025 at 3:54 PM
An origami poppy flower for Remembrance Day. share.google/wlcoGv9bc4SO...
From @desmos.com graph to Tinkercad to a phyical 3D printed object. My first 3D print of a Desmos project. I added a loop in Tinkercad so that I could add a string and hang it. #ITeachMath @edtechcocek.bsky.social
November 8, 2025 at 2:42 PM
From @desmos.com graph to Tinkercad to a phyical 3D printed object. My first 3D print of a Desmos project. I added a loop in Tinkercad so that I could add a string and hang it. #ITeachMath @edtechcocek.bsky.social
Calculated the volume of my chess pawn in Desmos with integrals as 3.92cm^3. Used a graduated cylinder to measure the displacement of the piece as approximately 4ml. Calculation confirmed! Had to hold down the pawn with the point of a pencil since it floats otherwise. #ITeachMath
November 5, 2025 at 10:44 PM
Calculated the volume of my chess pawn in Desmos with integrals as 3.92cm^3. Used a graduated cylinder to measure the displacement of the piece as approximately 4ml. Calculation confirmed! Had to hold down the pawn with the point of a pencil since it floats otherwise. #ITeachMath
Compared mine to an actual chess pawn… Seems that I made a pretty good estimate on size.
November 5, 2025 at 11:23 AM
Compared mine to an actual chess pawn… Seems that I made a pretty good estimate on size.
A chess piece planned in @desmos.com, designed in Tinkercad, and printed on a 3D printer. I’m hoping to have my Calculus 12 students design their own chess pieces this year as we explore volumes of rotation. @edtechcocek.bsky.social #ITeachMath
November 5, 2025 at 12:50 AM
A chess piece planned in @desmos.com, designed in Tinkercad, and printed on a 3D printer. I’m hoping to have my Calculus 12 students design their own chess pieces this year as we explore volumes of rotation. @edtechcocek.bsky.social #ITeachMath
Old school tally on a clipboard.
November 1, 2025 at 12:44 PM
Old school tally on a clipboard.
Also kept track of how many times people said "6, 7" as the walked down the side walk... 43 times... about 24% of visits. My favourite costume of the night was Trogdor the Burninator.
October 31, 2025 at 11:19 PM
Also kept track of how many times people said "6, 7" as the walked down the side walk... 43 times... about 24% of visits. My favourite costume of the night was Trogdor the Burninator.
Halloween Histogram 2025. The rain stopped this evening and we had the temperature stayed pleasant (13C-ish). 175 trick-or-treaters visited the house... about the same as last year. #HalloweenHistogram #MathOrTreat #StatsChat #ITeachMath
October 31, 2025 at 11:13 PM
Halloween Histogram 2025. The rain stopped this evening and we had the temperature stayed pleasant (13C-ish). 175 trick-or-treaters visited the house... about the same as last year. #HalloweenHistogram #MathOrTreat #StatsChat #ITeachMath
My pumpkin carving is complete. Ready for Halloween. 🎃 www.cbc.ca/news/enterta...
October 31, 2025 at 12:32 AM
My pumpkin carving is complete. Ready for Halloween. 🎃 www.cbc.ca/news/enterta...
Started math club today at lunch with the “Number the Sectors” challenge from Brian Bolt. Some great student thinking and strategizing. #ITeachMath
October 30, 2025 at 9:56 PM
Started math club today at lunch with the “Number the Sectors” challenge from Brian Bolt. Some great student thinking and strategizing. #ITeachMath
Recreating the recent heist at the Louvre in one of my favourite two-player games, Caper: Europe. My son won the game but I won the Louvre location. boardgamegeek.com/boardgame/32...
October 25, 2025 at 8:46 PM
Recreating the recent heist at the Louvre in one of my favourite two-player games, Caper: Europe. My son won the game but I won the Louvre location. boardgamegeek.com/boardgame/32...
Gearing up for tomorrow’s #NSMTA2025 math conference. Wearing my most high tech “smartwatch”. Don’t think it’s AI powered…
October 23, 2025 at 9:39 PM
Gearing up for tomorrow’s #NSMTA2025 math conference. Wearing my most high tech “smartwatch”. Don’t think it’s AI powered…
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
October 13, 2025 at 8:00 PM
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
Halloween is just around the corner. I made a Halloween treat esti-mystery to share with students. #ITeachMath docs.google.com/presentation...
October 9, 2025 at 1:28 AM
Halloween is just around the corner. I made a Halloween treat esti-mystery to share with students. #ITeachMath docs.google.com/presentation...
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
September 26, 2025 at 12:58 AM
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
My copy of The Mathematicians’ Library arrived! A medley of my favourite topics: mathematics, books and history. Really enjoying it so far. @teakayb.mathsy.space
September 20, 2025 at 12:47 PM
My copy of The Mathematicians’ Library arrived! A medley of my favourite topics: mathematics, books and history. Really enjoying it so far. @teakayb.mathsy.space
New Teacher Pro Tip: the best paper cutter in the school is probably the oldest one. This Ingento in the second floor staff room is probably older than I am but cuts beautifully. #ITeachMath
September 10, 2025 at 10:37 PM
New Teacher Pro Tip: the best paper cutter in the school is probably the oldest one. This Ingento in the second floor staff room is probably older than I am but cuts beautifully. #ITeachMath
All eight weeks of #MathPHoto25. Feel free to continue posting through the summer with any of the prompts (or combinations of prompts) you notice!
July 24, 2025 at 8:59 PM
All eight weeks of #MathPHoto25. Feel free to continue posting through the summer with any of the prompts (or combinations of prompts) you notice!
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
July 24, 2025 at 8:57 PM
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
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...
July 22, 2025 at 3:38 AM
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...
Train wheel #circles… are actually somewhat conical. The science of the shape of a train wheel is surprisingly complex. #MathPhoto25 www.scientificamerican.com/article/trai...
July 20, 2025 at 1:51 PM
Train wheel #circles… are actually somewhat conical. The science of the shape of a train wheel is surprisingly complex. #MathPhoto25 www.scientificamerican.com/article/trai...
A bike lane pavement marking. #circles from fad away but ellipses from close up. The magic of perspective. #MathPhoto25
July 18, 2025 at 6:41 PM
A bike lane pavement marking. #circles from fad away but ellipses from close up. The magic of perspective. #MathPhoto25
This clock has a #circle face, hands creating an #angle and time as a #measure of how much of the day is completed. #MathPhoto25
July 17, 2025 at 6:58 PM
This clock has a #circle face, hands creating an #angle and time as a #measure of how much of the day is completed. #MathPhoto25
A recap of the first 7 or 8 weeks of #MathPhoto25. Feel free to post photos from any week or a photo that captures multiple week's prompts. #ITeachMath
July 17, 2025 at 6:26 PM
A recap of the first 7 or 8 weeks of #MathPhoto25. Feel free to post photos from any week or a photo that captures multiple week's prompts. #ITeachMath
The penultimate week of #MathPhoto25 is #circles! Where do you notice circles, cylinders, spheres or ellipses in the world around you? #ITeachMath #MathsToday
July 17, 2025 at 6:23 PM
The penultimate week of #MathPhoto25 is #circles! Where do you notice circles, cylinders, spheres or ellipses in the world around you? #ITeachMath #MathsToday