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/
Reposted by Erick Lee
[New Post] Ontario Math Links - My favourite #math related links from this week:
ontariomath.blogspot.com/2025/11/math...
links and help from @robertkaplinsky.com @howiehua.bsky.social @karencampe.bsky.social @infobeautiful.bsky.social and more #MathChat #MTBoS #iTeachMath
ontariomath.blogspot.com/2025/11/math...
links and help from @robertkaplinsky.com @howiehua.bsky.social @karencampe.bsky.social @infobeautiful.bsky.social and more #MathChat #MTBoS #iTeachMath
November 9, 2025 at 8:00 PM
[New Post] Ontario Math Links - My favourite #math related links from this week:
ontariomath.blogspot.com/2025/11/math...
links and help from @robertkaplinsky.com @howiehua.bsky.social @karencampe.bsky.social @infobeautiful.bsky.social and more #MathChat #MTBoS #iTeachMath
ontariomath.blogspot.com/2025/11/math...
links and help from @robertkaplinsky.com @howiehua.bsky.social @karencampe.bsky.social @infobeautiful.bsky.social and more #MathChat #MTBoS #iTeachMath
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
Reposted by Erick Lee
New project alert!
Which One Doesn't Belong? Second Edition.
I am deep in the middle of writing and would love input from folks who have used the routine in their classrooms.
Short Google form here—one page, eight questions, most of them optional: docs.google.com/forms/d/e/1F...
Which One Doesn't Belong? Second Edition.
I am deep in the middle of writing and would love input from folks who have used the routine in their classrooms.
Short Google form here—one page, eight questions, most of them optional: docs.google.com/forms/d/e/1F...
Which One Doesn't Belong, 2nd Edition
Hi! I'm Christopher, and I'm working on a second edition of the Teacher Guide for my Stenhouse/Routledge book Which One Doesn't Belong? This book celebrates its tenth anniversary in 2026. I have learn...
docs.google.com
November 5, 2025 at 2:51 PM
New project alert!
Which One Doesn't Belong? Second Edition.
I am deep in the middle of writing and would love input from folks who have used the routine in their classrooms.
Short Google form here—one page, eight questions, most of them optional: docs.google.com/forms/d/e/1F...
Which One Doesn't Belong? Second Edition.
I am deep in the middle of writing and would love input from folks who have used the routine in their classrooms.
Short Google form here—one page, eight questions, most of them optional: docs.google.com/forms/d/e/1F...
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
Reposted by Erick Lee
Hi there! 🎃 There's a new episode of Graph Time today featuring special guest Jacqueline! Check out the video where we add interaction to our spider and play with the Graph to build your own web!
youtu.be/-aYROWdnaAc?...
www.desmos.com/calculator/2...
youtu.be/-aYROWdnaAc?...
www.desmos.com/calculator/2...
Halloween Graphing Part 2, Featuring Jacqueline!
YouTube video by Graph Time with Sara & Sean
youtu.be
October 31, 2025 at 9:32 PM
Hi there! 🎃 There's a new episode of Graph Time today featuring special guest Jacqueline! Check out the video where we add interaction to our spider and play with the Graph to build your own web!
youtu.be/-aYROWdnaAc?...
www.desmos.com/calculator/2...
youtu.be/-aYROWdnaAc?...
www.desmos.com/calculator/2...
Reposted by Erick Lee
Hallowe'en Histogram 2025 #MathOrTreat #Halloween2025
Total of 51 (24% decrease over last year), cloudy skies, temperature 12°C after dark. Also notable: the earliest arrival since recording began, at 5:30pm.
Total of 51 (24% decrease over last year), cloudy skies, temperature 12°C after dark. Also notable: the earliest arrival since recording began, at 5:30pm.
November 1, 2025 at 12:16 AM
Hallowe'en Histogram 2025 #MathOrTreat #Halloween2025
Total of 51 (24% decrease over last year), cloudy skies, temperature 12°C after dark. Also notable: the earliest arrival since recording began, at 5:30pm.
Total of 51 (24% decrease over last year), cloudy skies, temperature 12°C after dark. Also notable: the earliest arrival since recording began, at 5:30pm.
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
Reposted by Erick Lee
Here's a challenging Open Middle problem to help students develop conceptual understanding of quadratics in standard form: www.openmiddle.com/maximum-...
October 27, 2025 at 10:33 PM
Here's a challenging Open Middle problem to help students develop conceptual understanding of quadratics in standard form: www.openmiddle.com/maximum-...
Reposted by Erick Lee
Tonight calc ss at @lehmancollege.bsky.social got to consolidate their knowledge of differentiating natural log functions using a #SameDifffMath routine #MathPlay 🧮
#ITeachMath #MTBoS #EduSky #MathSky #MathsToday #Math
#ITeachMath #MTBoS #EduSky #MathSky #MathsToday #Math
October 30, 2025 at 11:34 PM
Tonight calc ss at @lehmancollege.bsky.social got to consolidate their knowledge of differentiating natural log functions using a #SameDifffMath routine #MathPlay 🧮
#ITeachMath #MTBoS #EduSky #MathSky #MathsToday #Math
#ITeachMath #MTBoS #EduSky #MathSky #MathsToday #Math
Reposted by Erick Lee
October 31, 2025 at 12:08 AM
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
Reposted by Erick Lee
Who said math was scary? 👻
Face your fears and add your own animations to the Desghost in this graph: www.desmos.com/calculator/m...
#iteachmath #mathsky
Face your fears and add your own animations to the Desghost in this graph: www.desmos.com/calculator/m...
#iteachmath #mathsky
October 30, 2025 at 5:25 PM
Who said math was scary? 👻
Face your fears and add your own animations to the Desghost in this graph: www.desmos.com/calculator/m...
#iteachmath #mathsky
Face your fears and add your own animations to the Desghost in this graph: www.desmos.com/calculator/m...
#iteachmath #mathsky
Reposted by Erick Lee
Reposted by Erick Lee
Sara and I made a spooky spider with wiggly legs and its web this week on Graph Time with Sara and Sean! See how we play with math and use it in our work:
www.youtube.com/watch?v=kQC_...
www.youtube.com/watch?v=kQC_...
October 27, 2025 at 8:11 PM
Sara and I made a spooky spider with wiggly legs and its web this week on Graph Time with Sara and Sean! See how we play with math and use it in our work:
www.youtube.com/watch?v=kQC_...
www.youtube.com/watch?v=kQC_...
Reposted by Erick Lee
If you're looking for a Halloween activity to do with your kids or students, you can make a "Flex-a-ghoul"—this is a Halloween-themed hexaflexagon that I made. There's a printable PDF on my blog: divisbyzero.com/2022/11/01/h...
October 27, 2025 at 3:02 PM
If you're looking for a Halloween activity to do with your kids or students, you can make a "Flex-a-ghoul"—this is a Halloween-themed hexaflexagon that I made. There's a printable PDF on my blog: divisbyzero.com/2022/11/01/h...
Reposted by Erick Lee
Join us in Moncton NB for the 2026 Building Thinking Classrooms Regional Conference with @peterliljedahl.bsky.social @btcthinks.bsky.social July 6–7, 2026! 🧠📚
💡 Discover practical strategies to spark deep thinking in your classroom
📩 Sign up for updates: tinyurl.com/yc6cfbzk
💡 Discover practical strategies to spark deep thinking in your classroom
📩 Sign up for updates: tinyurl.com/yc6cfbzk
October 12, 2025 at 12:34 PM
Join us in Moncton NB for the 2026 Building Thinking Classrooms Regional Conference with @peterliljedahl.bsky.social @btcthinks.bsky.social July 6–7, 2026! 🧠📚
💡 Discover practical strategies to spark deep thinking in your classroom
📩 Sign up for updates: tinyurl.com/yc6cfbzk
💡 Discover practical strategies to spark deep thinking in your classroom
📩 Sign up for updates: tinyurl.com/yc6cfbzk
Reposted by Erick Lee
[New Post] Ontario Math Links - My favourite #math related links from this week:
ontariomath.blogspot.com/2025/10/math...
links and help from @robertkaplinsky.com @howiehua.bsky.social @emmalalas.bsky.social @themathguru.bsky.social @pgliljedahl.bsky.social and more #MathChat #MTBoS #iTeachMath
ontariomath.blogspot.com/2025/10/math...
links and help from @robertkaplinsky.com @howiehua.bsky.social @emmalalas.bsky.social @themathguru.bsky.social @pgliljedahl.bsky.social and more #MathChat #MTBoS #iTeachMath
October 26, 2025 at 4:26 PM
[New Post] Ontario Math Links - My favourite #math related links from this week:
ontariomath.blogspot.com/2025/10/math...
links and help from @robertkaplinsky.com @howiehua.bsky.social @emmalalas.bsky.social @themathguru.bsky.social @pgliljedahl.bsky.social and more #MathChat #MTBoS #iTeachMath
ontariomath.blogspot.com/2025/10/math...
links and help from @robertkaplinsky.com @howiehua.bsky.social @emmalalas.bsky.social @themathguru.bsky.social @pgliljedahl.bsky.social and more #MathChat #MTBoS #iTeachMath
Reposted by Erick Lee
Yogurt consumption correlates with Google searches for 'i cant even' (r=0.939)
October 26, 2025 at 1:34 PM
Yogurt consumption correlates with Google searches for 'i cant even' (r=0.939)
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...
Reposted by Erick Lee
Never mind ‘Night at the Museum’, we’re talking MATHS in Museums 🔦
Did you know a key factor in building number confidence is seeing the value of numeracy in everyday life? Educator Tommaths (he/him) 🏳️🌈🏳️⚧️ shares 5 things museums don’t tell us about maths!
https://ow.ly/SECu50XhoUw
Did you know a key factor in building number confidence is seeing the value of numeracy in everyday life? Educator Tommaths (he/him) 🏳️🌈🏳️⚧️ shares 5 things museums don’t tell us about maths!
https://ow.ly/SECu50XhoUw
October 24, 2025 at 9:32 AM
Reposted by Erick Lee
We’re underway at #NSMTA2025 with a keynote session from Pam Harris! #ITeachMath
October 24, 2025 at 12:52 PM
We’re underway at #NSMTA2025 with a keynote session from Pam Harris! #ITeachMath
Reposted by Erick Lee
Teaching Calculus Creatively with @mathematicspro.bsky.social at #NSMTA2025. Lots of amazing hands on activities to engage students, make connections and activate prior knowledge. #ITeachMath
October 24, 2025 at 2:50 PM
Teaching Calculus Creatively with @mathematicspro.bsky.social at #NSMTA2025. Lots of amazing hands on activities to engage students, make connections and activate prior knowledge. #ITeachMath
Reposted by Erick Lee
That’s a wrap for #NSMTA2025. Thanks to @pwharris.bsky.social and Marian Small, our amazing keynote speakers. It was a great day of learning.
October 24, 2025 at 7:59 PM
That’s a wrap for #NSMTA2025. Thanks to @pwharris.bsky.social and Marian Small, our amazing keynote speakers. It was a great day of learning.