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
If this is your kind of art, be sure to enter the Desmos Art Contest by January 15th. Get all the details at desmos.com/art
#mathsky #iteachmath #mathart
#mathsky #iteachmath #mathart
November 25, 2025 at 2:21 PM
If this is your kind of art, be sure to enter the Desmos Art Contest by January 15th. Get all the details at desmos.com/art
#mathsky #iteachmath #mathart
#mathsky #iteachmath #mathart
Played a game of Zebra with my son tonight. A strategic 2-player multiplication game. My son learned it from NS Math Circles. mathpickle.com/project/zebr... #ITeachMath #MathPlay
November 25, 2025 at 11:23 AM
Played a game of Zebra with my son tonight. A strategic 2-player multiplication game. My son learned it from NS Math Circles. mathpickle.com/project/zebr... #ITeachMath #MathPlay
Reposted by Erick Lee
It's Mental Math Monday! Pam Harris from Math is Figureoutable wants to know how you would mentally calculate 15×36. Please share how you would do it in the comments.
November 24, 2025 at 4:24 PM
It's Mental Math Monday! Pam Harris from Math is Figureoutable wants to know how you would mentally calculate 15×36. Please share how you would do it in the comments.
Reposted by Erick Lee
With Year 12 today we were looking at remainder theorem and we did the very lovely true or false task from Integral maths. See also here my mini-whiteboard check before letting them get on which was nice as it forced them to think about the positions of the numbers.
#Alevelmaths #mathstoday
#Alevelmaths #mathstoday
November 24, 2025 at 9:54 AM
With Year 12 today we were looking at remainder theorem and we did the very lovely true or false task from Integral maths. See also here my mini-whiteboard check before letting them get on which was nice as it forced them to think about the positions of the numbers.
#Alevelmaths #mathstoday
#Alevelmaths #mathstoday
Reposted by Erick Lee
It's nearly Christmas and something terrible has happened... www.mscroggs.co.uk/blog/120
Christmas (2025) is coming!
The mscroggs.co.uk Advent Calendar is back for its eleventh year, making it the Advent calendar's tenth anniversary! Behind each door, there will be a puzzle with a three digit solution. The solution ...
www.mscroggs.co.uk
November 20, 2025 at 3:26 PM
It's nearly Christmas and something terrible has happened... www.mscroggs.co.uk/blog/120
Playing bingo in a junior high gymnasium… just waiting to see what happens when O-67 is called.
November 20, 2025 at 11:01 PM
Playing bingo in a junior high gymnasium… just waiting to see what happens when O-67 is called.
Reposted by Erick Lee
🖌️🎨 Spice up your #maths classroom! 😃
What does your teacher name look like in mathematical lettering?
Craft a cool display title or door plaque in seconds!
Try it: mathswhiteboard.com/MWB/mathemat...
Share your in the comments...
@mathsjem.bsky.social #TeacherTools
What does your teacher name look like in mathematical lettering?
Craft a cool display title or door plaque in seconds!
Try it: mathswhiteboard.com/MWB/mathemat...
Share your in the comments...
@mathsjem.bsky.social #TeacherTools
November 17, 2025 at 9:07 PM
🖌️🎨 Spice up your #maths classroom! 😃
What does your teacher name look like in mathematical lettering?
Craft a cool display title or door plaque in seconds!
Try it: mathswhiteboard.com/MWB/mathemat...
Share your in the comments...
@mathsjem.bsky.social #TeacherTools
What does your teacher name look like in mathematical lettering?
Craft a cool display title or door plaque in seconds!
Try it: mathswhiteboard.com/MWB/mathemat...
Share your in the comments...
@mathsjem.bsky.social #TeacherTools
Reposted by Erick Lee
What Are We Going to Do With 300 Billion Pennies? - The Atlantic
The government has no plan.
www.theatlantic.com
November 16, 2025 at 3:45 PM
Reposted by Erick Lee
The most wonderful time of the year is here: Art Contest season! ✨
Head to desmos.com/art to learn more, and be sure to submit your graphs by January 15th, 2026!
#mathsky #iteachmath
Head to desmos.com/art to learn more, and be sure to submit your graphs by January 15th, 2026!
#mathsky #iteachmath
November 14, 2025 at 2:03 PM
The most wonderful time of the year is here: Art Contest season! ✨
Head to desmos.com/art to learn more, and be sure to submit your graphs by January 15th, 2026!
#mathsky #iteachmath
Head to desmos.com/art to learn more, and be sure to submit your graphs by January 15th, 2026!
#mathsky #iteachmath
Reposted by Erick Lee
“While visions of Cinnabons danced in his head.” 🎩
November 14, 2025 at 10:18 PM
“While visions of Cinnabons danced in his head.” 🎩
Reposted by Erick Lee
Hey all! We've got a new episode of Graph Time with Sara and Sean for you today! Sara and I were playing with some graphs and discovered a really fun way to create tons of beautiful mathematical patterns. Check out the episode: www.youtube.com/watch?v=7v0J...
Discovering Beautiful Mathematical Patterns
YouTube video by Graph Time with Sara & Sean
www.youtube.com
November 14, 2025 at 7:49 PM
Hey all! We've got a new episode of Graph Time with Sara and Sean for you today! Sara and I were playing with some graphs and discovered a really fun way to create tons of beautiful mathematical patterns. Check out the episode: www.youtube.com/watch?v=7v0J...
Reposted by Erick Lee
🎨 Building custom lessons just got easier!
Join our free Intro to Activity Building webinar on Nov. 18 at 6:30 p.m. ET and learn how to design, customize, and create with confidence.
✨ Register for free: at.amplify.com/4hNAtXx.
Join our free Intro to Activity Building webinar on Nov. 18 at 6:30 p.m. ET and learn how to design, customize, and create with confidence.
✨ Register for free: at.amplify.com/4hNAtXx.
Amplify Classroom | Professional learning webinars
Discover how to implement interactive lessons and tools for math, literacy, and science with our upcoming free Amplify Classroom webinars.
at.amplify.com
November 11, 2025 at 10:56 PM
🎨 Building custom lessons just got easier!
Join our free Intro to Activity Building webinar on Nov. 18 at 6:30 p.m. ET and learn how to design, customize, and create with confidence.
✨ Register for free: at.amplify.com/4hNAtXx.
Join our free Intro to Activity Building webinar on Nov. 18 at 6:30 p.m. ET and learn how to design, customize, and create with confidence.
✨ Register for free: at.amplify.com/4hNAtXx.
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...