Jed
@jedediyah.com
Teacher ◦ Robots and mathy science ◦ He/Him
#ITeachMath #ITeachPhysics #TeamCompSci
#mtbos #PAEMST
https://jedediyah.github.io/
#ITeachMath #ITeachPhysics #TeamCompSci
#mtbos #PAEMST
https://jedediyah.github.io/
Pinned
Jed
@jedediyah.com
· Nov 21
Math educators, where do you fall within the levels of ethical engagement??
arxiv.org/abs/2212.11713
#iteachmath #iteachcs #mtbos
arxiv.org/abs/2212.11713
#iteachmath #iteachcs #mtbos
Reposted by Jed
A now well-known-ish open conjecture! One reason that the tetrahedron problem is tougher is that the triangle inequality on each side is necessary but NOT sufficient.
To see a deeper reason for the difficulty, the condition on a tetrahedron involves the
en.wikipedia.org/wiki/Cayley%...
#iTeachMath
To see a deeper reason for the difficulty, the condition on a tetrahedron involves the
en.wikipedia.org/wiki/Cayley%...
#iTeachMath
November 28, 2025 at 5:32 PM
A now well-known-ish open conjecture! One reason that the tetrahedron problem is tougher is that the triangle inequality on each side is necessary but NOT sufficient.
To see a deeper reason for the difficulty, the condition on a tetrahedron involves the
en.wikipedia.org/wiki/Cayley%...
#iTeachMath
To see a deeper reason for the difficulty, the condition on a tetrahedron involves the
en.wikipedia.org/wiki/Cayley%...
#iTeachMath
A classic probability problem:
Given a stick broken randomly at two places, what is the probability that a triangle can be formed by the three pieces.
There are various proofs of the answer, but we used this last week to demonstrate Monte Carlo approaches to finding probability distributions.
Given a stick broken randomly at two places, what is the probability that a triangle can be formed by the three pieces.
There are various proofs of the answer, but we used this last week to demonstrate Monte Carlo approaches to finding probability distributions.
November 28, 2025 at 5:25 PM
A classic probability problem:
Given a stick broken randomly at two places, what is the probability that a triangle can be formed by the three pieces.
There are various proofs of the answer, but we used this last week to demonstrate Monte Carlo approaches to finding probability distributions.
Given a stick broken randomly at two places, what is the probability that a triangle can be formed by the three pieces.
There are various proofs of the answer, but we used this last week to demonstrate Monte Carlo approaches to finding probability distributions.
The @internetofbugs.com videos are always good. Doing the work of simple fact checking of AI hype.
"Unlike the SciShow team, I'm just one guy, and it certainly doesn't help when the channels like SciShow that do have the resources to make things better, choose to make things worse instead."
"Unlike the SciShow team, I'm just one guy, and it certainly doesn't help when the channels like SciShow that do have the resources to make things better, choose to make things worse instead."
SciShow Is Lying to You about AI. Here are the receipts.
YouTube video by Internet of Bugs
www.youtube.com
November 26, 2025 at 12:44 AM
The @internetofbugs.com videos are always good. Doing the work of simple fact checking of AI hype.
"Unlike the SciShow team, I'm just one guy, and it certainly doesn't help when the channels like SciShow that do have the resources to make things better, choose to make things worse instead."
"Unlike the SciShow team, I'm just one guy, and it certainly doesn't help when the channels like SciShow that do have the resources to make things better, choose to make things worse instead."
Reposted by Jed
[New Post] Ontario Math Links - My favourite #math related links from this week:
ontariomath.blogspot.com/2025/11/math...
Links and help from @davidporas.bsky.social @howiehua.bsky.social @infobeautiful.bsky.social @jedediyah.com and more #MathChat #MTBoS #iTeachMath
ontariomath.blogspot.com/2025/11/math...
Links and help from @davidporas.bsky.social @howiehua.bsky.social @infobeautiful.bsky.social @jedediyah.com and more #MathChat #MTBoS #iTeachMath
November 23, 2025 at 6:30 PM
[New Post] Ontario Math Links - My favourite #math related links from this week:
ontariomath.blogspot.com/2025/11/math...
Links and help from @davidporas.bsky.social @howiehua.bsky.social @infobeautiful.bsky.social @jedediyah.com and more #MathChat #MTBoS #iTeachMath
ontariomath.blogspot.com/2025/11/math...
Links and help from @davidporas.bsky.social @howiehua.bsky.social @infobeautiful.bsky.social @jedediyah.com and more #MathChat #MTBoS #iTeachMath
Shared a Thanksgiving gift with my data science students today! I spend a couple months collecting used copies. Next month we will read chapter 3 Arms Race and reflect on feedback systems and the susceptibility and sensitivity of data models to manipulation.
November 21, 2025 at 8:03 PM
Shared a Thanksgiving gift with my data science students today! I spend a couple months collecting used copies. Next month we will read chapter 3 Arms Race and reflect on feedback systems and the susceptibility and sensitivity of data models to manipulation.
Last week we worked on combinatorics and I asked about the weight of a binary word.
In #MathsToday we worked on random walks and I asked what is the probability of ending where we started. Some of the students used the weight solution to find the probability! 🥳
#mtbos #ITeachMath
In #MathsToday we worked on random walks and I asked what is the probability of ending where we started. Some of the students used the weight solution to find the probability! 🥳
#mtbos #ITeachMath
November 21, 2025 at 5:24 PM
Last week we worked on combinatorics and I asked about the weight of a binary word.
In #MathsToday we worked on random walks and I asked what is the probability of ending where we started. Some of the students used the weight solution to find the probability! 🥳
#mtbos #ITeachMath
In #MathsToday we worked on random walks and I asked what is the probability of ending where we started. Some of the students used the weight solution to find the probability! 🥳
#mtbos #ITeachMath
"Have you ever been a reader? I think I want to try to be a reader. I might get some books this weekend."
Overheard today 📖
Overheard today 📖
November 19, 2025 at 2:50 AM
"Have you ever been a reader? I think I want to try to be a reader. I might get some books this weekend."
Overheard today 📖
Overheard today 📖
In #MathsToday we rolled a lot of dice and found estimates of probability mass functions for sums of n=2,3 4 dice.
In #MathsNextWeek we start to explore broken stick problems!
Draft of next week's guide:
williams-bhs.github.io/docs/Broken_...
In #MathsNextWeek we start to explore broken stick problems!
Draft of next week's guide:
williams-bhs.github.io/docs/Broken_...
November 14, 2025 at 6:02 PM
In #MathsToday we rolled a lot of dice and found estimates of probability mass functions for sums of n=2,3 4 dice.
In #MathsNextWeek we start to explore broken stick problems!
Draft of next week's guide:
williams-bhs.github.io/docs/Broken_...
In #MathsNextWeek we start to explore broken stick problems!
Draft of next week's guide:
williams-bhs.github.io/docs/Broken_...
In #MathsToday, we saw some amazing and diverse approaches to this problem:
Using the optimal strategy in "Guess my number from 1 to 100" (where we get feedback "higher" or "lower"), what is the average number of guesses it will take as more games are played?
Using the optimal strategy in "Guess my number from 1 to 100" (where we get feedback "higher" or "lower"), what is the average number of guesses it will take as more games are played?
November 13, 2025 at 8:46 PM
In #MathsToday, we saw some amazing and diverse approaches to this problem:
Using the optimal strategy in "Guess my number from 1 to 100" (where we get feedback "higher" or "lower"), what is the average number of guesses it will take as more games are played?
Using the optimal strategy in "Guess my number from 1 to 100" (where we get feedback "higher" or "lower"), what is the average number of guesses it will take as more games are played?
In #MathsToday we played with the "Cat Machine" and talked about theoretical probabilities, experimental probability, and confidence in our experimental probabilities.
November 13, 2025 at 8:43 PM
In #MathsToday we played with the "Cat Machine" and talked about theoretical probabilities, experimental probability, and confidence in our experimental probabilities.
Reposted by Jed
I have two books by an author, Keh-Gong Shih, pub in 1996 that are just brilliant! But they are definitely lost. The first is PIctorial Mathematics: Patterns. It is fabulous! full of images like this. He created his own software called Mathgraf which is used to generate the images. #mathart #mtbos
November 11, 2025 at 9:22 PM
Reposted by Jed
Here’s video of federal agents doing a drive by pepper spraying that hit a father and his one-year old on Saturday when the Feds were hitting Little Village and Cicero
November 9, 2025 at 9:30 PM
Here’s video of federal agents doing a drive by pepper spraying that hit a father and his one-year old on Saturday when the Feds were hitting Little Village and Cicero
Reposted by Jed
I wrote about shallow, vague, fuzzy definitions of "conceptual understanding" and a better way to think about it. pershmail.substack.com/p/understand...
"Understanding" Shouldn't Be Vague or Mysterious
Let's do some pedagogy.
pershmail.substack.com
November 11, 2025 at 2:42 PM
I wrote about shallow, vague, fuzzy definitions of "conceptual understanding" and a better way to think about it. pershmail.substack.com/p/understand...
Was really curious to see how these problems would go over in #MathsToday. It was great!
We talked about how to map all of the problems onto the last problem and the usefulness of knowing "how to solve it" when we can recognize and abstract problems to known strategies.
We talked about how to map all of the problems onto the last problem and the usefulness of knowing "how to solve it" when we can recognize and abstract problems to known strategies.
November 4, 2025 at 6:00 PM
Was really curious to see how these problems would go over in #MathsToday. It was great!
We talked about how to map all of the problems onto the last problem and the usefulness of knowing "how to solve it" when we can recognize and abstract problems to known strategies.
We talked about how to map all of the problems onto the last problem and the usefulness of knowing "how to solve it" when we can recognize and abstract problems to known strategies.
In #MathsToday, we looked at Towers of Hanoi, then asked about the optimal number of moves given n towers with k disks.
Our theme is limitations of mathematics, i.e., the difference between the 2 body problem and the 3 body problem isn't just 1 more body.
williams-bhs.github.io/slides/combi...
Our theme is limitations of mathematics, i.e., the difference between the 2 body problem and the 3 body problem isn't just 1 more body.
williams-bhs.github.io/slides/combi...
CDS
williams-bhs.github.io
November 3, 2025 at 3:56 PM
In #MathsToday, we looked at Towers of Hanoi, then asked about the optimal number of moves given n towers with k disks.
Our theme is limitations of mathematics, i.e., the difference between the 2 body problem and the 3 body problem isn't just 1 more body.
williams-bhs.github.io/slides/combi...
Our theme is limitations of mathematics, i.e., the difference between the 2 body problem and the 3 body problem isn't just 1 more body.
williams-bhs.github.io/slides/combi...
I once gave a talk called "AI is not what you think it is unless you think it is hot garbage"
I've just enjoyed and highly recommend @chrissimon.au's "AI is a hype-fuelled dumpster fire that will burn down the planet and get you thrown in jail"
www.youtube.com/watch?v=0bF_...
I've just enjoyed and highly recommend @chrissimon.au's "AI is a hype-fuelled dumpster fire that will burn down the planet and get you thrown in jail"
www.youtube.com/watch?v=0bF_...
November 2, 2025 at 11:03 PM
I once gave a talk called "AI is not what you think it is unless you think it is hot garbage"
I've just enjoyed and highly recommend @chrissimon.au's "AI is a hype-fuelled dumpster fire that will burn down the planet and get you thrown in jail"
www.youtube.com/watch?v=0bF_...
I've just enjoyed and highly recommend @chrissimon.au's "AI is a hype-fuelled dumpster fire that will burn down the planet and get you thrown in jail"
www.youtube.com/watch?v=0bF_...
Reposted by Jed
November is here, and so is the next Calendar of problems!
Enjoy these with your students or for yourself, share your thinking here or on the post.
#MTBoS #iTeachMath #T3Learns #MathSky #RecreationalMath #MathsToday
karendcampe.wordpress.com/2025/11/01/n...
Enjoy these with your students or for yourself, share your thinking here or on the post.
#MTBoS #iTeachMath #T3Learns #MathSky #RecreationalMath #MathsToday
karendcampe.wordpress.com/2025/11/01/n...
November Calendar Problems
Wow, November has blown in with some wild weather, but at least we can get an extra hour of sleep tonight as we “fall back” to standard time. It’s a busy month at school, as the f…
karendcampe.wordpress.com
November 1, 2025 at 12:19 PM
November is here, and so is the next Calendar of problems!
Enjoy these with your students or for yourself, share your thinking here or on the post.
#MTBoS #iTeachMath #T3Learns #MathSky #RecreationalMath #MathsToday
karendcampe.wordpress.com/2025/11/01/n...
Enjoy these with your students or for yourself, share your thinking here or on the post.
#MTBoS #iTeachMath #T3Learns #MathSky #RecreationalMath #MathsToday
karendcampe.wordpress.com/2025/11/01/n...
Reposted by Jed
Does a copy of this report exist somewhere?
"Discrete Mathematics and the Secondary Mathematics Curriculum"
1990
eric.ed.gov?id=ED325367
#Mtbos #ITeachMath
"Discrete Mathematics and the Secondary Mathematics Curriculum"
1990
eric.ed.gov?id=ED325367
#Mtbos #ITeachMath
ERIC - ED325367 - Discrete Mathematics and the Secondary Mathematics Curriculum., 1990
Discrete mathematics, the mathematics of decision making for finite settings, is a topic of great interest in mathematics education at all levels. Attention is being focused on resolving the diversity...
eric.ed.gov
October 30, 2025 at 1:37 PM
Does a copy of this report exist somewhere?
"Discrete Mathematics and the Secondary Mathematics Curriculum"
1990
eric.ed.gov?id=ED325367
#Mtbos #ITeachMath
"Discrete Mathematics and the Secondary Mathematics Curriculum"
1990
eric.ed.gov?id=ED325367
#Mtbos #ITeachMath
Does a copy of this report exist somewhere?
"Discrete Mathematics and the Secondary Mathematics Curriculum"
1990
eric.ed.gov?id=ED325367
#Mtbos #ITeachMath
"Discrete Mathematics and the Secondary Mathematics Curriculum"
1990
eric.ed.gov?id=ED325367
#Mtbos #ITeachMath
ERIC - ED325367 - Discrete Mathematics and the Secondary Mathematics Curriculum., 1990
Discrete mathematics, the mathematics of decision making for finite settings, is a topic of great interest in mathematics education at all levels. Attention is being focused on resolving the diversity...
eric.ed.gov
October 30, 2025 at 1:37 PM
Does a copy of this report exist somewhere?
"Discrete Mathematics and the Secondary Mathematics Curriculum"
1990
eric.ed.gov?id=ED325367
#Mtbos #ITeachMath
"Discrete Mathematics and the Secondary Mathematics Curriculum"
1990
eric.ed.gov?id=ED325367
#Mtbos #ITeachMath
Reposted by Jed
Hello #iTeachMath friends! If you're attending ATMNE New England conference this week, come to hear me & @sneffleupagus.bsky.social present on "Building Community thru K-12 Math Routines"
Shelby's a wee bit taller than me so I made her sit for this photo.
#MTBoS @atmnemath.bsky.social
Shelby's a wee bit taller than me so I made her sit for this photo.
#MTBoS @atmnemath.bsky.social
October 30, 2025 at 12:06 AM
Hello #iTeachMath friends! If you're attending ATMNE New England conference this week, come to hear me & @sneffleupagus.bsky.social present on "Building Community thru K-12 Math Routines"
Shelby's a wee bit taller than me so I made her sit for this photo.
#MTBoS @atmnemath.bsky.social
Shelby's a wee bit taller than me so I made her sit for this photo.
#MTBoS @atmnemath.bsky.social
In #MathsToday, trying to talk about state machines without talking about state machines.
Also debated with students whether we should fully represent all 12 states or reduce the number of bits to the minimum required (depending on number of states used).
Also debated with students whether we should fully represent all 12 states or reduce the number of bits to the minimum required (depending on number of states used).
October 29, 2025 at 10:30 PM
In #MathsToday, trying to talk about state machines without talking about state machines.
Also debated with students whether we should fully represent all 12 states or reduce the number of bits to the minimum required (depending on number of states used).
Also debated with students whether we should fully represent all 12 states or reduce the number of bits to the minimum required (depending on number of states used).
In #MathsToday we continued working on our graph theory exercises.
October 28, 2025 at 11:12 PM
In #MathsToday we continued working on our graph theory exercises.
In #MathsToday we are working on graphs, and getting some motivation for our next unit on combinatorics.
October 23, 2025 at 4:15 PM
In #MathsToday we are working on graphs, and getting some motivation for our next unit on combinatorics.
Danya was one of my favorite people. He was particularly famous in the chess world for being exceedingly kind. That's a good thing to be famous for.
The Charlotte Chess Center, where Naroditsky trained and worked as a coach, announced his death, calling him "a talented chess player, educator, and beloved member of the chess community." n.pr/472VQjQ
American chess grandmaster Daniel Naroditsky dies at 29
The Charlotte Chess Center, where Naroditsky trained and worked as a coach, announced his death, calling him "a talented chess player, educator, and beloved member of the chess community."
n.pr
October 21, 2025 at 11:17 AM
Danya was one of my favorite people. He was particularly famous in the chess world for being exceedingly kind. That's a good thing to be famous for.
Reposted by Jed
How many classes today were canceled because a whole suite of EdTech services are built atop AWS?
You know what platform never crashes?
You know what platform never crashes?
October 20, 2025 at 4:19 PM
How many classes today were canceled because a whole suite of EdTech services are built atop AWS?
You know what platform never crashes?
You know what platform never crashes?