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/
"I've not seen such bravery"
December 30, 2025 at 8:52 PM
"I've not seen such bravery"
Reposted by Erick Lee
20 minutes to watch this would be well-spent in an upper-level HS math class. Note the prevalence of women mathematicians in this cutting-edge work! #iTeachMath #mtbos
@quantamagazine.bsky.social: "The Biggest Breakthroughs in Mathematics: 2025" #mtbos
The Biggest Breakthroughs in Mathematics: 2025
YouTube video by Quanta Magazine
www.youtube.com
December 30, 2025 at 8:28 PM
20 minutes to watch this would be well-spent in an upper-level HS math class. Note the prevalence of women mathematicians in this cutting-edge work! #iTeachMath #mtbos
Reposted by Erick Lee
#mathart and 3D rhombus prisms from @paulakrieg.bsky.social bookzoompa.wordpress.com/2025/12/29/t...
Three Dimensional Shapes on my Mind
The study of three dimensional forms has been beckoning me. I’m completely delighted to have my attention drawn to these forms. Creating solid shapes put of paper is not intutive. It’s also n…
bookzoompa.wordpress.com
December 30, 2025 at 7:56 PM
#mathart and 3D rhombus prisms from @paulakrieg.bsky.social bookzoompa.wordpress.com/2025/12/29/t...
Reposted by Erick Lee
December 29, 2025 at 5:30 PM
Reposted by Erick Lee
New! My 194th gems post. Ideas, resources and updates for maths teachers. 💎
www.resourceaholic.com/2025/12/5-ma...
Hat tips to follow.
#mathstoday #ukmathschat #alevelmaths
www.resourceaholic.com/2025/12/5-ma...
Hat tips to follow.
#mathstoday #ukmathschat #alevelmaths
December 29, 2025 at 11:28 AM
New! My 194th gems post. Ideas, resources and updates for maths teachers. 💎
www.resourceaholic.com/2025/12/5-ma...
Hat tips to follow.
#mathstoday #ukmathschat #alevelmaths
www.resourceaholic.com/2025/12/5-ma...
Hat tips to follow.
#mathstoday #ukmathschat #alevelmaths
Reposted by Erick Lee
[New Post] Ontario Math Links - My favourite #math related links from this week:
ontariomath.blogspot.com/2025/12/math...
Links and help from @pwharris.bsky.social @stevenstrogatz.com @howiehua.bsky.social and more #MathChat #MTBoS #iTeachMath
ontariomath.blogspot.com/2025/12/math...
Links and help from @pwharris.bsky.social @stevenstrogatz.com @howiehua.bsky.social and more #MathChat #MTBoS #iTeachMath
December 28, 2025 at 10:59 PM
[New Post] Ontario Math Links - My favourite #math related links from this week:
ontariomath.blogspot.com/2025/12/math...
Links and help from @pwharris.bsky.social @stevenstrogatz.com @howiehua.bsky.social and more #MathChat #MTBoS #iTeachMath
ontariomath.blogspot.com/2025/12/math...
Links and help from @pwharris.bsky.social @stevenstrogatz.com @howiehua.bsky.social and more #MathChat #MTBoS #iTeachMath
Reposted by Erick Lee
#playfulmath carnival 183! mathhombre.blogspot.com/2025/12/play... Writing on teaching, fun math, puzzles, games, art...
Playful Math Carnival 183
Welcome to the 183rd edition of the Playful Math Carnival. Begun by Denise Gaskins, previously known as Math Teachers at Play. If you'd be i...
mathhombre.blogspot.com
December 27, 2025 at 2:22 AM
#playfulmath carnival 183! mathhombre.blogspot.com/2025/12/play... Writing on teaching, fun math, puzzles, games, art...
Reposted by Erick Lee
Merry Christmas using Python
December 25, 2025 at 4:32 AM
Merry Christmas using Python
Reposted by Erick Lee
How many gifts were given in the song "12 Days of Christmas"?
December 25, 2025 at 5:14 PM
How many gifts were given in the song "12 Days of Christmas"?
I've just completed all the puzzles in the mscroggs.co.uk Advent calendar! My favourite puzzle was Day 8. #ITeachMath @mscroggs.co.uk
mscroggs.co.uk
It's nearly Christmas and something terrible has happened: after years of gradual wear and tear, Santa's magic sleigh has fallen apart. You need to help Santa build a new sleigh so that he can deliver...
mscroggs.co.uk
December 25, 2025 at 5:39 PM
I've just completed all the puzzles in the mscroggs.co.uk Advent calendar! My favourite puzzle was Day 8. #ITeachMath @mscroggs.co.uk
Reposted by Erick Lee
Here’s a festive puzzle for you to round off the year!
A big thank you to all the teachers, students and volunteers who support UKMT — we couldn’t do this without you.
The UKMT Team
PS - view the solution on our website: ukmt.org.uk/puzzles
#mathstoday #UKMT
A big thank you to all the teachers, students and volunteers who support UKMT — we couldn’t do this without you.
The UKMT Team
PS - view the solution on our website: ukmt.org.uk/puzzles
#mathstoday #UKMT
December 24, 2025 at 10:17 AM
Here’s a festive puzzle for you to round off the year!
A big thank you to all the teachers, students and volunteers who support UKMT — we couldn’t do this without you.
The UKMT Team
PS - view the solution on our website: ukmt.org.uk/puzzles
#mathstoday #UKMT
A big thank you to all the teachers, students and volunteers who support UKMT — we couldn’t do this without you.
The UKMT Team
PS - view the solution on our website: ukmt.org.uk/puzzles
#mathstoday #UKMT
An origami cube from Sonobe units. Nice instructions from #mathscraftnz. #ITeachMath static1.squarespace.com/static/5754f...
December 22, 2025 at 4:12 PM
An origami cube from Sonobe units. Nice instructions from #mathscraftnz. #ITeachMath static1.squarespace.com/static/5754f...
Reposted by Erick Lee
Looking for some nerdy drawing fun over the next few weeks?
My Xmas & New Year zines are available to download for £1 (or more) and you’re welcome to print as many copies as you want!
They’re A4 but I’m told can be printed on Letter paper & trimmed
#SciArt
ko-fi.com/hanaayoob/shop
My Xmas & New Year zines are available to download for £1 (or more) and you’re welcome to print as many copies as you want!
They’re A4 but I’m told can be printed on Letter paper & trimmed
#SciArt
ko-fi.com/hanaayoob/shop
December 20, 2025 at 12:25 PM
Looking for some nerdy drawing fun over the next few weeks?
My Xmas & New Year zines are available to download for £1 (or more) and you’re welcome to print as many copies as you want!
They’re A4 but I’m told can be printed on Letter paper & trimmed
#SciArt
ko-fi.com/hanaayoob/shop
My Xmas & New Year zines are available to download for £1 (or more) and you’re welcome to print as many copies as you want!
They’re A4 but I’m told can be printed on Letter paper & trimmed
#SciArt
ko-fi.com/hanaayoob/shop
The clue for door 19 of the mscroggs.co.uk puzzle math Advent calendar is devious! My colleague and I couldn’t find our mistakes… now we know why! @mscroggs.co.uk #ITeachMath
mscroggs.co.uk
It's nearly Christmas and something terrible has happened: after years of gradual wear and tear, Santa's magic sleigh has fallen apart. You need to help Santa build a new sleigh so that he can deliver...
mscroggs.co.uk
December 19, 2025 at 10:45 PM
The clue for door 19 of the mscroggs.co.uk puzzle math Advent calendar is devious! My colleague and I couldn’t find our mistakes… now we know why! @mscroggs.co.uk #ITeachMath
Reposted by Erick Lee
Another Mathematical Objects podcast episode is out! Find out about the interesting maths behind a slice of pizza: aperiodical.com/2025/12/math...
aperiodical.com
December 19, 2025 at 10:02 PM
Another Mathematical Objects podcast episode is out! Find out about the interesting maths behind a slice of pizza: aperiodical.com/2025/12/math...
Can anyone recommend a good book for high school on the mathematics of origami? #ITeachMath
December 19, 2025 at 8:42 PM
Can anyone recommend a good book for high school on the mathematics of origami? #ITeachMath
Folding and cutting stars from regular pentagons at the Citadel HS math club today. Students had fun with origami and made some decorations to take home. #ITeachMath #HRCEMath
December 18, 2025 at 9:02 PM
Folding and cutting stars from regular pentagons at the Citadel HS math club today. Students had fun with origami and made some decorations to take home. #ITeachMath #HRCEMath
Attended a session of NS Math Circles this evening at Dalhousie Univ. I was introduced to the Cops and Robbers vertex pursuit game. #ITeachMath anthonybonato.com/a-new-prehis...
December 18, 2025 at 2:21 AM
Attended a session of NS Math Circles this evening at Dalhousie Univ. I was introduced to the Cops and Robbers vertex pursuit game. #ITeachMath anthonybonato.com/a-new-prehis...
Reposted by Erick Lee
Warm-ups are small but mighty. Done well, they spark thinking, invite every student in, and set the tone for the entire lesson.
kurtsalisbury.substack.com/.../what-wor....
classroom.amplify.com/.../6930704d...
kurtsalisbury.substack.com/.../what-wor....
classroom.amplify.com/.../6930704d...
December 17, 2025 at 4:59 PM
Warm-ups are small but mighty. Done well, they spark thinking, invite every student in, and set the tone for the entire lesson.
kurtsalisbury.substack.com/.../what-wor....
classroom.amplify.com/.../6930704d...
kurtsalisbury.substack.com/.../what-wor....
classroom.amplify.com/.../6930704d...
Reposted by Erick Lee
"When will I ever use this?" "How is this useful in my life?"
Not everything we learn in math has to be applied. Math can be seen as an art as well.
Not everything we learn in math has to be applied. Math can be seen as an art as well.
December 16, 2025 at 8:48 PM
"When will I ever use this?" "How is this useful in my life?"
Not everything we learn in math has to be applied. Math can be seen as an art as well.
Not everything we learn in math has to be applied. Math can be seen as an art as well.
Reposted by Erick Lee
Today in #ALevelMaths my 2025 A-Level Calculated colouring went up on my website. Feel free to use :) blog.drbennisonmaths.com/blog/2025/12...
December 15, 2025 at 8:24 PM
Today in #ALevelMaths my 2025 A-Level Calculated colouring went up on my website. Feel free to use :) blog.drbennisonmaths.com/blog/2025/12...
Reposted by Erick Lee
Eli, founder and CEO of Desmos Studio dropped by for this week's episode where we talk about recursion and chaos. We had so much fun that this is just part 1! youtu.be/0JLRmP-F03Q?...
Recursion and Chaos in Desmos with Eli part 1
YouTube video by Graph Time with Sara & Sean
youtu.be
December 14, 2025 at 9:33 PM
Eli, founder and CEO of Desmos Studio dropped by for this week's episode where we talk about recursion and chaos. We had so much fun that this is just part 1! youtu.be/0JLRmP-F03Q?...
Reposted by Erick Lee
🎄🎁⭐For anyone, like me, who happens to be teaching negative and fractional indices in the final week of term, here's a Christmas colouring sheet I've made that you might find useful.
www.draustinmaths.com/powers-and-roots
#MathsToday #UKMathsChat
www.draustinmaths.com/powers-and-roots
#MathsToday #UKMathsChat
December 14, 2025 at 2:54 PM
🎄🎁⭐For anyone, like me, who happens to be teaching negative and fractional indices in the final week of term, here's a Christmas colouring sheet I've made that you might find useful.
www.draustinmaths.com/powers-and-roots
#MathsToday #UKMathsChat
www.draustinmaths.com/powers-and-roots
#MathsToday #UKMathsChat
Folding mathy holiday origami ornaments this morning using patterns from @hitomezashibot.bsky.social.
December 14, 2025 at 1:35 PM
Folding mathy holiday origami ornaments this morning using patterns from @hitomezashibot.bsky.social.
Reposted by Erick Lee
Here's a #yohaku to take you into the weekend. Fill in cells with 16 different factors of 828 to get totals shown in each row/column AND shaded cells contain square numbers. #mathsky #iTeachMath
December 12, 2025 at 11:58 AM
Here's a #yohaku to take you into the weekend. Fill in cells with 16 different factors of 828 to get totals shown in each row/column AND shaded cells contain square numbers. #mathsky #iTeachMath