Robin Johannsen
@rjohannsen.bsky.social
Math teacher in Toronto ⭐️
This problem came up in #MathsToday and it is more delicate that it may initially seem.
"For what values of k does k*sin^2(x) + sin(x) + 1 = 0 have solutions?" What would you do?
"For what values of k does k*sin^2(x) + sin(x) + 1 = 0 have solutions?" What would you do?
February 6, 2025 at 4:47 PM
This problem came up in #MathsToday and it is more delicate that it may initially seem.
"For what values of k does k*sin^2(x) + sin(x) + 1 = 0 have solutions?" What would you do?
"For what values of k does k*sin^2(x) + sin(x) + 1 = 0 have solutions?" What would you do?
Reposted by Robin Johannsen
#MathPlay 🧮 Have you seen @mathequalslove.bsky.social
Mathematical Alphabet Resources? Lots of great ideas💡
#MathSky #ITeachMath #MTBoS #MathsToday #EduSky
🔗👇
mathequalslove.net/mathematical...
Mathematical Alphabet Resources? Lots of great ideas💡
#MathSky #ITeachMath #MTBoS #MathsToday #EduSky
🔗👇
mathequalslove.net/mathematical...
December 5, 2024 at 12:01 AM
#MathPlay 🧮 Have you seen @mathequalslove.bsky.social
Mathematical Alphabet Resources? Lots of great ideas💡
#MathSky #ITeachMath #MTBoS #MathsToday #EduSky
🔗👇
mathequalslove.net/mathematical...
Mathematical Alphabet Resources? Lots of great ideas💡
#MathSky #ITeachMath #MTBoS #MathsToday #EduSky
🔗👇
mathequalslove.net/mathematical...
High school math teachers, what do you put up on the walls in your classroom and why? What's the first thing you'd put up in a new classroom? Looking for ideas! I have lots of whiteboards already and lots of unused space...
#iTeachMath ♾️
#iTeachMath ♾️
December 4, 2024 at 11:06 PM
High school math teachers, what do you put up on the walls in your classroom and why? What's the first thing you'd put up in a new classroom? Looking for ideas! I have lots of whiteboards already and lots of unused space...
#iTeachMath ♾️
#iTeachMath ♾️
Reposted by Robin Johannsen
Not sure if the #playwithyourmath team are "here". I can't wait to try out the newest post, Jump Step, playwithyourmath.com/2024/12/01/3... #iteachmath #imentormathed #MTBoS
December 1, 2024 at 9:08 PM
Not sure if the #playwithyourmath team are "here". I can't wait to try out the newest post, Jump Step, playwithyourmath.com/2024/12/01/3... #iteachmath #imentormathed #MTBoS
Reposted by Robin Johannsen
Specialise, Conjecture and Generalise.
A three-step plan to encourage and develop mathematical thinking when faced with an unfamiliar problem.
A three-step plan to encourage and develop mathematical thinking when faced with an unfamiliar problem.
November 28, 2024 at 9:26 PM
Specialise, Conjecture and Generalise.
A three-step plan to encourage and develop mathematical thinking when faced with an unfamiliar problem.
A three-step plan to encourage and develop mathematical thinking when faced with an unfamiliar problem.
Reposted by Robin Johannsen
Folks in 🇨🇦 and elsewhere… the Ontario Assoc for Math Ed (OAME) conference has become the SPOT for great #ITeachMath pedagogy. Consider proposing a session for May 2025!
What’s that idea you’ve been working on? Throw it in!
What’s that idea you’ve been working on? Throw it in!
Want to present at OAME2025? The deadline to submit session proposals has been extended to November 29th. Proposals can be submitted through MCIS (mcis.oame.on.ca). @OAMEcounts
#mtbos #mathed #onted
#mtbos #mathed #onted
November 24, 2024 at 5:23 AM
Folks in 🇨🇦 and elsewhere… the Ontario Assoc for Math Ed (OAME) conference has become the SPOT for great #ITeachMath pedagogy. Consider proposing a session for May 2025!
What’s that idea you’ve been working on? Throw it in!
What’s that idea you’ve been working on? Throw it in!
Reposted by Robin Johannsen
What fraction of each circle is shaded?
(The 12 points on the circumference are equally spaced, and the other dot is the centre)
I’d love to see how you solved it!
#geometrypuzzle
(The 12 points on the circumference are equally spaced, and the other dot is the centre)
I’d love to see how you solved it!
#geometrypuzzle
November 17, 2024 at 4:34 PM
What fraction of each circle is shaded?
(The 12 points on the circumference are equally spaced, and the other dot is the centre)
I’d love to see how you solved it!
#geometrypuzzle
(The 12 points on the circumference are equally spaced, and the other dot is the centre)
I’d love to see how you solved it!
#geometrypuzzle
Reposted by Robin Johannsen
today's NYT connections reminded me of two pebble mentions as relates to calculus:
1) etymology of calculus (the mathematical ♾️ type)
2) a quotation from Newton, one of the big names in early calculus, about how he saw himself
🪨 🪨 #iTeachMath
1) etymology of calculus (the mathematical ♾️ type)
2) a quotation from Newton, one of the big names in early calculus, about how he saw himself
🪨 🪨 #iTeachMath
November 13, 2024 at 2:01 PM
today's NYT connections reminded me of two pebble mentions as relates to calculus:
1) etymology of calculus (the mathematical ♾️ type)
2) a quotation from Newton, one of the big names in early calculus, about how he saw himself
🪨 🪨 #iTeachMath
1) etymology of calculus (the mathematical ♾️ type)
2) a quotation from Newton, one of the big names in early calculus, about how he saw himself
🪨 🪨 #iTeachMath
Reposted by Robin Johannsen
Reposted by Robin Johannsen
For new BlueSky users, please consider flipping the toggle to require Alt Text on all photos that you post. I did it when I started here and it did not take long to get used to it.
It helps to make this community more inclusive.
It helps to make this community more inclusive.
November 11, 2024 at 2:21 AM
For new BlueSky users, please consider flipping the toggle to require Alt Text on all photos that you post. I did it when I started here and it did not take long to get used to it.
It helps to make this community more inclusive.
It helps to make this community more inclusive.
Reposted by Robin Johannsen
Today is a good day for #ProblemSolving !
Here are 3 nice ones from the April Calendar of Problems; try them out & share your ideas.
#MTBoS #iTeachMath #MathSky #MathChat #Geometry #Algebra
Check out more problems at:
karendcampe.wordpress.com/2024/04/01/a...
Here are 3 nice ones from the April Calendar of Problems; try them out & share your ideas.
#MTBoS #iTeachMath #MathSky #MathChat #Geometry #Algebra
Check out more problems at:
karendcampe.wordpress.com/2024/04/01/a...
April 17, 2024 at 4:26 PM
Today is a good day for #ProblemSolving !
Here are 3 nice ones from the April Calendar of Problems; try them out & share your ideas.
#MTBoS #iTeachMath #MathSky #MathChat #Geometry #Algebra
Check out more problems at:
karendcampe.wordpress.com/2024/04/01/a...
Here are 3 nice ones from the April Calendar of Problems; try them out & share your ideas.
#MTBoS #iTeachMath #MathSky #MathChat #Geometry #Algebra
Check out more problems at:
karendcampe.wordpress.com/2024/04/01/a...
Reposted by Robin Johannsen
The 2nd episode is a great listen if you want to get a little existential - which is fitting, since it is about zero.
I love Radiolab because an episode about dividing by zero is really about finding meaning in existence.
radiolab.org/podcast/zero...
I love Radiolab because an episode about dividing by zero is really about finding meaning in existence.
radiolab.org/podcast/zero...
Zeroworld
In mathematics you’re allowed to do everything, for the most part, except for this.
radiolab.org
December 31, 2023 at 5:28 PM
The 2nd episode is a great listen if you want to get a little existential - which is fitting, since it is about zero.
I love Radiolab because an episode about dividing by zero is really about finding meaning in existence.
radiolab.org/podcast/zero...
I love Radiolab because an episode about dividing by zero is really about finding meaning in existence.
radiolab.org/podcast/zero...
Reposted by Robin Johannsen
The last 2 episodes of Radiolab are some of my favourites.
They're about math, but the parts of math I like best: the human experience of doing math, the way people use math as a kind of refuge from the world & also how people build community around it.
1st episode:
radiolab.org/podcast/numb...
They're about math, but the parts of math I like best: the human experience of doing math, the way people use math as a kind of refuge from the world & also how people build community around it.
1st episode:
radiolab.org/podcast/numb...
Numbers
Love 'em or hate 'em, you rely on numbers every day. We ask how they confuse us, connect us, & even reveal secrets about us.
radiolab.org
December 31, 2023 at 5:26 PM
The last 2 episodes of Radiolab are some of my favourites.
They're about math, but the parts of math I like best: the human experience of doing math, the way people use math as a kind of refuge from the world & also how people build community around it.
1st episode:
radiolab.org/podcast/numb...
They're about math, but the parts of math I like best: the human experience of doing math, the way people use math as a kind of refuge from the world & also how people build community around it.
1st episode:
radiolab.org/podcast/numb...
This has big *tap tap is this thing on* energy BUT the math department at The York School is hosting the 2024 ISOMA Conference on Jan 11, 2024. Please share with any Ontario Independent school math teachers you know! Registration is open until Thurs, Dec 21st. drive.google.com/file/d/1XiTu...
December 7, 2023 at 12:14 AM
This has big *tap tap is this thing on* energy BUT the math department at The York School is hosting the 2024 ISOMA Conference on Jan 11, 2024. Please share with any Ontario Independent school math teachers you know! Registration is open until Thurs, Dec 21st. drive.google.com/file/d/1XiTu...