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jedediyah.com
Jed
@jedediyah.com
890 followers 880 following 650 posts
Teacher ◦ Robots and mathy science ◦ He/Him
#ITeachMath #ITeachPhysics #TeamCompSci
#mtbos #PAEMST

https://jedediyah.github.io/
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jedediyah.com
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
6 Levels of ethical engagement for mathematicians: Level -1: Actively obstructing efforts to address ethics in mathematics (a new level not explicitly stated in Chiodo and Bursill-Hall (2018), but suggested here as an extension) Level 0: Believing there is no ethics in mathematics Level 1: Realising there are ethical issues inherent in mathematics Level 2: Doing something: speaking out to other mathematicians Level 3: Taking a seat at the tables of power Level 4: Calling out the bad mathematics of others
Reposted by Jed
madisonkittay.bsky.social
Normalize laughing derisively in men's faces when they deserve it.
February 18, 2026 at 7:00 PM
jedediyah.com
Really stretching hard to make the math jokes work in this chapter on Number...
Then your friend Chelsea, also from twenty-eight thousand years ago, notices another connection: sometimes she can combine two arrangements from Pattern 2 to get a bigger arrangement also in Pattern 2, but it doesn’t always work. She finds this one: 9 with 16 makes 25 Pattern 3 1 rock, 8 rocks, 27 rocks Chelsea, who is rightly proud of her discovery about combinations in Pattern 2, searches for similar combinations in Pattern 3. She wants to find two piles in Pattern 3 that can combine together to get another pile in Pattern 3, but this last format is challenging and it will be quite a wiles before someone figures it out.
February 18, 2026 at 12:36 AM
jedediyah.com
Teachers are great.

Had an awesome PD day today. Every teacher there was simply a generous kind-hearted person dedicating a career to encouraging and supporting young people in exploring their interests, doing their best, and leading happy lives.
February 12, 2026 at 1:07 AM
Reposted by Jed
404media.co
In today’s #404DeepDive, @jasonkoebler.bsky.social gets into Ring’s new feature Search Party which was advertised at the Super Bowl which essentially turns the entire neighborhood into a security dragnet.

Read more: www.404media.co/with-ring-am...
February 10, 2026 at 7:09 PM
Reposted by Jed
mpershan.bsky.social
Any teachers out there, especially math teachers: wanna join a discord? Message me!
February 8, 2026 at 9:22 PM
Reposted by Jed
mpershan.bsky.social
I think learning/teaching is about the dance between explicit understanding and our implicit habits, and I think this is confusing, and I think this is also what's confusing about being a person more generally. pershmail.substack.com/p/understand...
Understanding and Habit
Making sense of arguments about teaching
pershmail.substack.com
February 5, 2026 at 3:09 PM
jedediyah.com
In #MathsToday we found sums by creating sequences with NumPy.
"Find the following sums" followed by four sigma notation expressions. Python print statements containing numpy summations. "Write the most concise NumPy expressions you can to evaluate the summations of the following sequences" followed by a set of sequences.
February 3, 2026 at 9:48 PM
jedediyah.com
In #MathsToday we explored the palmer penguins data set from
allisonhorst.github.io/palmerpengui...
and did some manual feature engineering.
Scatter plot of beak depth vs beak length for three species of penguin. Scatter plot of beak depth vs beak length for three species of penguin. Decision boundaries separate the points.
February 2, 2026 at 8:38 PM
Reposted by Jed
karencampe.bsky.social
Time for winter #ProblemSolving! Here's the February Calendar of Problems for you and your students.

Tell us your working out here or on the post. ENJOY!
#MTBoS #iTeachMath #RecreationalMath #MathSky #MathsToday #T3Learns

karendcampe.wordpress.com/2026/02/01/f...
February Calendar Problems
February is here and if you need a distraction from winter weather ❄️, I have the February 2016 Calendar of Problems from 10 years ago for some wintertime problem solving enjoyment. I have a few mo…
karendcampe.wordpress.com
February 1, 2026 at 3:41 PM
jedediyah.com
In class yesterday I was talking about heat transfer & I mentioned electro-magnetic energy. I then spent around 20 minutes answering fantastic eager questions about the EM spectrum, particle-wave duality, frequency and color, human physiology and perception, etc. And I didn't even make any of it up!
benpatrickwill.bsky.social Ben Williamson @benpatrickwill.bsky.social · 18d
He may be a "Godfather of AI" but Geoffrey Hinton has no idea about education or teaching and should really quit doing uninformed, straw man-bashing, free marketing for right-wing billionaire- and investor-backed private, anti-DEI, automated schooling outfits www.businessinsider.com/godfather-ai...
Screenshot of interview with Geoffrey Hinton, reading: "A normal teacher is in broadcast mode in a classroom, where they're telling the children the answers to questions the children didn't just wonder about," Hinton said. "Whereas with an AI tutor, the AI tutor can always be telling you the answers to questions you did just wonder about, and you learn much faster that way." Hinton said the Alpha School was expensive because AI is expensive, but said he expects it to become much cheaper as the technology becomes more affordable."
January 31, 2026 at 11:53 PM
Reposted by Jed
unsolvedmre.bsky.social
One superpower #math gives me is the ability to picture an interesting object in my head, spark up #Mathematica, and within a few minutes figure out how to make it "real." It's intoxicating!

(code in ALT)
January 31, 2026 at 3:50 PM
jedediyah.com
"It's just really important for anyone who is using a computer to do mathematics to understand that [chatbots] are not computation engines and we really shouldn't treat them like that."

"Nobody should be doing their taxes with ChatGPT 🤣"

#ITeachMath #mtbos #AIinEducation #AIeducation #AIedu
Debate 48 - Is A.I. Helpful in Math Education?
YouTube video by DebateMath Podcast
youtu.be
January 30, 2026 at 12:11 AM
jedediyah.com
In #MathsToday, we continued solving linear systems both at whiteboards and with NumPy, and there were several wonderful breakthroughs in understanding!

We saw the first steps of Gaussian elimination (without yet naming it) and one great reaction was "wait you can just solve any matrix you want"
>>> import numpy as np >>> r = np.random.rand(3,4) >>> r array([[0.18487845, 0.57661705, 0.04339225, 0.34596879], [0.71953505, 0.9111707 , 0.62555752, 0.91202757], [0.91937155, 0.69415961, 0.17472662, 0.47850455]]) >>> r[0] = r[0] / r[0][0] >>> r array([[1. , 3.11889819, 0.23470691, 1.87133115], [0.71953505, 0.9111707 , 0.62555752, 0.91202757], [0.91937155, 0.69415961, 0.17472662, 0.47850455]]) >>> r[1] = r[1] - r[1][0]*r[0] >>> r array([[ 1. , 3.11889819, 0.23470691, 1.87133115], [ 0. , -1.33298588, 0.45667767, -0.43446079], [ 0.91937155, 0.69415961, 0.17472662, 0.47850455]]) >>> r[2] = r[2] - r[2][0]*r[0] >>> r array([[ 1. , 3.11889819, 0.23470691, 1.87133115], [ 0. , -1.33298588, 0.45667767, -0.43446079], [ 0. , -2.17326664, -0.04105624, -1.24194406]]) >>>
January 29, 2026 at 9:55 PM
jedediyah.com
In #MathsToday we solved systems of equations with row operations in NumPy.

I did this in MATLAB for many years and don't like the NumPy syntax... but it went well!

#ITeachMath #mtbos #ComputingInMath
Let's use row operations to solve the system: -x-y-3z =-9 3x+0y+z=-1 1x-5y+z=23 A Python script demonstrates row operations on a numpy array.
January 28, 2026 at 4:37 PM
jedediyah.com
The message I tried to bring to this discussion was:

IF there is a way to responsibly incorporate #AI into math education, we definitely aren't doing it...

#ITeachMath #mtbos #AIinEducation #AIedu
jedediyah.com Jed @jedediyah.com · 28d
New #DebateMath on AI in Math Education! It was a privilege to largely agree with Cal and Ed.

My opening remarks:

We have a professional responsibility as educators to vet technologies we bring into the classroom. Unfortunately, that’s largely *not* happening.
Debate 48 - Is A.I. Helpful in Math Education?
YouTube video by DebateMath Podcast
youtu.be
January 22, 2026 at 7:31 PM
jedediyah.com
New #DebateMath on AI in Math Education! It was a privilege to largely agree with Cal and Ed.

My opening remarks:

We have a professional responsibility as educators to vet technologies we bring into the classroom. Unfortunately, that’s largely *not* happening.
Debate 48 - Is A.I. Helpful in Math Education?
YouTube video by DebateMath Podcast
youtu.be
January 22, 2026 at 11:58 AM
jedediyah.com
Got to give a guest lecture on AI to a Science Ethics course!

Students had fantastic questions. One that stuck out: "How is all this legal?"
January 14, 2026 at 11:16 PM
jedediyah.com
The number of players on @chess.com who abandon games without resigning has skyrocketed in the past few weeks.

Tried to leave feedback but got the chat bot that told me to clear my browser cache. Thanks AI!
Screenshot of the Chess.com AI chatbot. A user prompt reads: A HUGE number of my opponents disconnect without resigning. I NEED chess.com to be more active about consequences for abandoning games. The bot then responds to an unrelated concern. Continuation of previous screenshot. The bot continues to respond to an unrelated concern.
January 14, 2026 at 11:04 PM
Reposted by Jed
literaryhub.bsky.social
“i want back my rocking chairs, / solipsist sunsets, / & coastal jungle sounds...”

A poem by Renee Nicole Good, who was murdered by ICE earlier today.

lithub.com/renee-nicole...
Renee Nicole Good, murdered by ICE, was a prize-winning poet. Here’s that poem.
Renee Nicole Good, 37, mother to a six-year-old boy, was murdered earlier today by an ICE agent in Minneapolis, a few blocks from her home. According to the Minnesota Star Tribune: [An ICE agent] s…
lithub.com
January 8, 2026 at 3:54 AM
jedediyah.com
In #MathsToday we modeled a tide.

Part (e) led to some amazing passionate mathematical arguments!

(e) Our model has four parameters. Could you still model the tide well enough with only three?
Here is a a dataset of water depths: Depths a. Copy and paste the data into Desmos to create a scatter plot. This should create a table. b. We are going to adjust, by hand, the parameters of a sinusoidal model (do not do an automated regression): y = beta_0 + beta_1 sin(beta_2 t + beta_3) Add this model to Desmos as shown (you can type "beta" to create a ). c. Add the sliders and adjust them until your model appears to fit the data. Record your best hand-fit parameter values. d. Interpret each of the parameters in the context of the model. For example, represents a particular property of the tide which you can describe. e. Our model has four parameters. Could you still model the tide well enough with only three? Scatter plot of sinusoidal data with a sine wave roughly fitting the data.
January 7, 2026 at 11:07 PM
jedediyah.com
Only January 1 and 1998 NCTM is already being saucy!
January 1, 2026 at 2:55 PM
jedediyah.com
Looking forward to a #TechFreeJanuary in the classroom to start the new year (with exception for Data Science which was largely tech free up to now).

#ITeachMath #mtbos
December 31, 2025 at 1:29 AM
jedediyah.com
"Iterating Linear Functions—An Introduction to Dynamical Systems"
1997
Jonathan Choate and (edited by) @hpicciotto.bsky.social

If students are going to understand machine learning, they should start with iteration and fundamentals of dynamical systems.

#MathEdPaperOfTheWeek
#mtbos #ITeachMath
pubs.nctm.org
December 30, 2025 at 12:15 AM
jedediyah.com
I gave a talk in 2024 called "Sensitive Dependence on Initial Conditions: How AI Predictably Fails Unpredictably". A dope title!
jedediyah.github.io/aapt2024/

In examples of AI failing where we shouldn't be using AI, I highlighted a behavior nobody should be surprised by: AI encouraging suicide.
Title Slide: Sensitive dependence on initial conditions How AI predictably fails unpredictably Jedediyah Williams AAPT Summer Conference 2024 AI in K-12 Classrooms jedediyah.github.io/aapt2024 Examples of AI responses to Google queries. In the right pane, a query "i'm feeling depressed" resulted in a suggestion of "jumping off the Golden Gate Bridge"
December 29, 2025 at 12:44 AM
Reposted by Jed
jjvincent.bsky.social
another robot highlight for 2025: man wearing humanoid mocap suit kicks himself in the balls
December 27, 2025 at 5:27 PM