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Mandy Jansen

@mandymathed.bsky.social
1.8K followers 1K following 450 posts

Professor of mathematics education at the University of Delaware's School of Education. Former middle school mathematics teacher in Arizona. I wrote a book called Rough Draft Math: Revising to Learn. (Obviously, all views are my own.)

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Tammie Visintainer @proftv.bsky.social · 29/09/2026
Here's to the brave editorial board students for the Cornell Daily Mail! 💪🏼 "This is not a dark chapter in Cornell’s history, it’s a morbid pattern....where enough ambiguity, enough he-said-she-said, enough familial connections, enough money will allow you to get off scot-free."
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Mandy Jansen @mandymathed.bsky.social · 24/08/2026
Rough Draft Math tips of the month for math teachers (at any level) -- check this PDF out at the link below, share with others. Any thoughts about the ideas? #RoughDraftMath drive.google.com/file/d/1JjqY...
drive.google.com
Rough Draft Math August 2026.pdf
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Mandy Jansen @mandymathed.bsky.social · 24/08/2026
Rough Draft Math tips of the month for math teachers (at any level) -- check this PDF out at the link below, share with others. Any thoughts about the ideas? #RoughDraftMath drive.google.com/file/d/1JjqY...
drive.google.com
Rough Draft Math August 2026.pdf
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Haydee, PhD @haydeelindo.bsky.social · 18/08/2026
I'm teaching first semester Calculus this Fall. Met with the teaching team yesterday. What are we doing in the "age of AI": like others, deweighting all at-home assessments. Still brainstorming additive (as opposed to subtractive) adjustments ...
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Don Moynihan @donmoyn.bsky.social · 14/07/2026
This is akin to Trump raiding the National Parks Service in order to pay for his Reflecting Pool disaster. (Which he has done). Take something that works remarkably well, and divert resources to cronies to deliver something the public did not ask for.
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Larry Mitchell @drlarrymitchell.bsky.social · 17/06/2026
If we took control of the Epstein files away from the people featured in the Epstein files we'd actually see the Goddamned Epstein files.
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Pavel @spavel.bsky.social · 17/06/2026
When you make 1 trillion dollars, you have won the game. They should give you a parade and a gold statue. And then take away all your money and you start New Game+ with tougher enemies.
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Monica Potts @monicapotts.bsky.social · 11/06/2026
Remember when Howard Dean had a weird yell and it ended his political career? Just thinking of the olden days.
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Mark Peifer (He, him) @peiferlabunc.bsky.social · 02/06/2026
Russell Vought, Director of the OMB, has issued a set of proposed changes that would dramatically alter federal grant funding. However, we can each take action to prevent these from taking effect. Here's how, a 🧵 🧪 1/n www.science.org/content/arti...
science.org
White House seeks to tighten political oversight of grantmaking
Sweeping proposed rule, now open for comments, would also restrict foreign collaborations and remove federal funding for open-access fees
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Karen James @kejames.bsky.social · 29/05/2026
A lot of people are talking about this but not nearly enough are emphasizing that it is a PROPOSAL and that we can and should SUBMIT COMMENT by July 13. Chanda shares deets in this thread.
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Faith Rogow @insightersed.bsky.social · 29/05/2026
This is urgent enough to make it and end-of-year writing assignment for high school students to weigh in with official comments and letters to their legislators. It's their future at stake.
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Alex Wild @alexwild.bsky.social · 30/05/2026
tl,dr; Scientists no longer allowed to use federal funding to publish, attend meetings, or talk to the public. They cannot collaborate internationally. Grants can be cancelled for any reason, at any time, political appointees have a final say over what gets funded, and who gets funded.
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Matt Zoller Seitz @mattzollerseitz.bsky.social · 15/05/2026
"The true cost of war shows up long after the fighting stops."
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Matt Seybold @mattseybold.bsky.social · 14/04/2026
When you attempt to scale the beneficent effects of tutoring, those effects go away. Feels like this would be pretty obvious to anybody who has ever been or had a tutor. The 1-to-1 instructor to student ratio is definitional.
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Mandy Jansen @mandymathed.bsky.social · 16/01/2026
In the midst of packing and moving houses -- to a home that is closer to campus. Say yes to a 5 minute commute and potentially biking once the weather is right. That said, I'm cognitively off due to stress. Not finding my words from time to time. I'll be happy when this move is done.
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Dominique Baker @bakerdphd.bsky.social · 13/01/2026
It would appear I am now a columnist at Inside Higher Ed. My first piece focuses on McCarthyism, censorship, and our current moment in higher education. This is an essay I started nearly 6 months ago so I'm glad to finally share it with y'all. www.insidehighered.com/opinion/colu...
insidehighered.com
Censorship Arrives on Campus
In her debut column, “Echoes in the Quad,” higher education policy scholar Dominique J. Baker explores how the political oppression of the McCarthy era reverberates in the stifling of academic freedom...
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Tressie McMillan Cottom @tressiemcphd.bsky.social · 08/01/2026
Remembering today that having your heart broken is a necessary step on the path to becoming fully human. Whichever heartbreak is your first, it’s probably critical that a state break your heart so that you can develop a political imagination. If this is your first, I’m sorry and also welcome.
A 35 year old letter to the editor, written by a very ballsy 15 year old, about the Rodney King verdict.
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Mandy Jansen @mandymathed.bsky.social · 04/01/2026
Friends, I was stuck in Puerto Rico for an extra day due to USA’s military actions in Venezuela. I am against what happened there. It was an act of war without Congressional approval. It was harmful to civilians. My travel situation is pretty annoying, too, but I am safe.
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Mandy Jansen @mandymathed.bsky.social · 17/12/2025
Went to Longwood Gardens last night. It was lovely to see it lit up with snow on the ground.
Snow on the ground. A tree covered with lights, lit up at night.
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Stenhouse Publishers @stenhousepub.bsky.social · 09/12/2025
🔥 Hot off the press! 📘 A must-have for classroom discourse in the elementary math classroom! Check up the updates in the second edition here. ➡️ spr.ly/633227CTho
spr.ly
Intentional Talk and Listening: How to Structure and Lead Productive Mathematical Discussions
Math teachers know the first step to meaningful mathematics discussions is to ask students to share how they solved a problem and make their thinking visible; however, knowing where to go next can be a daunting task. In Intentional Talk and Listening: How to Structure and Lead Productive Mathematical Discussions, Elham Kazemi and Allison Hintz provide teachers with a practical framework for planning and facilitating purposeful math talks that move group discussions to the next level while achiev
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Ralph Pantozzi @mathillustrated.bsky.social · 07/12/2025
Mathematicians, math enthusiasts, and math teachers everywhere should want a piece of this: #iTeachMath
nytimes.com
Is There a Better Way to Cut a Cake?
Rings, zigzags, slabs and elaborate geometric designs are giving savvy party hosts new methods for a more equitable slice.
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Peter Keep @mathprofpeter.bsky.social · 02/12/2025
This week is the 🎡 Reassessment Carnival 🎡 in my classes, where students optionally retake any assessment to update me one last time with a demonstration of what they know. It's an exciting and stressful and satisfying week full of celebration for students' accomplishments and also a TON of grading.
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Mandy Jansen @mandymathed.bsky.social · 23/11/2025
Worth waiting a year for Part 2! Such a gorgeous film - Wicked: For Good!
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Mandy Jansen @mandymathed.bsky.social · 23/11/2025
An event where the line for the men’s restroom is longer than the women’s? Hockey. Go Flyers!
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Uncle Duke @uncleduke1969.bsky.social · 19/11/2025
squirrel: *points gun* me: what do you want me to do? squirrel: *gestures at sign* me: alright, i get it *opens book drop* squirrel: *makes hurry-up motion* me: NOT A SQUIRREL! squirrel: *disappears into book drop* me: *whispers* forgive me, keith
Sign on a library book drop sign requesting people to yell "NOT A SQUIRREL" to confirm they are human and not a squirrel trying to steal Keith's lunch.
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Mandy Jansen @mandymathed.bsky.social · 12/11/2025
If we ever doubted that he was in the files... you can read some emails here.
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Phil Lewis @phillewis.bsky.social · 10/11/2025
The Supreme Court has rejected a call to overturn its landmark decision that legalized same-sex marriage nationwide
huffpost.com
Supreme Court Rejects Call To Overturn Its Decision Legalizing Same-sex Marriage Nationwide
The Supreme Court has rejected a call to overturn its landmark decision that legalized same-sex marriage nationwide.
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Cliff Poole 🌹 @cpoolenyc.bsky.social · 23/10/2025
This is Trump “not touching“ the East Wing of the White House. Remember this the next time Trump says he won’t touch Social Security. abcnews.go.com/Politics/ent...
abcnews.go.com
Entire East Wing expected to be demolished as soon as this weekend, sources say
The White House is expected to demolish the entire East Wing to allow for construction of President Trump’s ballroom, sources familiar with the project told ABC News.
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Shaily Patel @vox-magica.bsky.social · 20/10/2025
when your class is online asynchronous but canvas is down because of AWS crashing. 🙃 i don't know, y'all, seems to me like letting three companies run everything is a bad idea.
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Mat Johnson @matjohnson.bsky.social · 20/10/2025
Happy "PROFESSOR!!! CANVAS IS DOWN!!!" day to all academics who celebrate.
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Mandy Jansen @mandymathed.bsky.social · 20/10/2025
Also Canvas!!!
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Stone Cold Jane Austen @abbyhiggs.bsky.social · 20/10/2025
The way one company can bring down half the fucking internet
Services impacted by AWS attack/outage

® Impacted (67 services)
AWS Application Migration Service
AWS Batch
AWS Client VPN
AWS CloudTrail
AWS Config
AWS Database Migration Service
AWS Deadline Cloud
AWS Directory Service
AWS Elemental
AWS Global Accelerator
AWS Glue
AWS Healthimaging
AWS HealthLake
AWS HealthOmics
AWS loT Core
AWS Lambda
AWS Outposts
AWS Parallel Computing Service
AWS Payment Cryptography
AWS Private Certificate Authority
AWS Secrets Manager
AWS Site-to-Site. VPN
AWS Transit Gateway
AWS Verified Access
Amazon AppStream 2.0
Amazon Athena
Amazon Aurora DSQL Service
Amazon Bedrock
Amazon Chime
Amazon CloudFront|
Amazon Cognito
Amazon DocumentDB
Amazon EMR Serverless
Amazon ElastiCache
Amazon Elastic Compute Cloud
Amazon Elastic Container Registry
Amazon Elastic Container Service
Amazon Elastic Kubernetes Service
Amazon Elastic Load Balancing
Amazon Elastic MapReduce
Amazon EventBridge
Amazon FSx
Amazon GameLift Servers
Amazon GameLift Streams
Amazon Interactive Video Service
Amazon Kendra
Amazon Kinesis Video Streams
Amazon Location Service
Amazon MQ
Amazon Managed Service for
Apache Flink
Amazon Managed Service for
Prometheus
Amazon Managed Streaming for
Apache Kafka
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Erick Lee @theericklee.bsky.social · 18/10/2025
Inspired by #NCTMATL25 to present at an upcoming conference? Both NCTM and OAME 2026 conference proposals close on Nov. 1st. Here are some thoughts on the benefits of writing a math conference proposal. pbbmath.weebly.com/blog/confere... #ITeachMath @oamelearns.bsky.social
pbbmath.weebly.com
Conference Proposals to Clarify Your Practice
The 2025 NCTM conference kicks off in just a few days in Atlanta, Georgia. Social media is full of teachers preparing for the event and exhibitors inviting participants to visit their booths. While I....
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Christie Nold @christienold.bsky.social · 19/10/2025
There is a robust conversation already about supporting students digital literacy abilities. This is good & necessary & (from what I can see) happening. I would offer that there is an equally compelling case for the need to practice perspective taking. I wish this was more supported.
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Mandy Jansen @mandymathed.bsky.social · 18/10/2025
Why did a delivery driver ring my doorbell early in the morning on a day when I could sleep in but not any other day?
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Mandy Jansen @mandymathed.bsky.social · 17/10/2025
I am vaccinated. I also value herd immunity, so get your shots, please!
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Mandy Jansen @mandymathed.bsky.social · 16/10/2025
At the NCTM research conference, @meg-botello.bsky.social and I presented about a mathematics teacher’s incorporation of drafting and revising into an Illustrative Mathematics lesson.
Two women smiling on either side of an academic poster.
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Mandy Jansen @mandymathed.bsky.social · 16/10/2025
I did not know that Family Feud was filmed in Atlanta when I created a Family Feud game for my NCTM burst session to present in ATL! Do you have any answers to the question?
What opportunities are present in curriculum materials to engage students in drafting and revising?Family Feud signDescribes game rules, but the larger point is that everyone wins just by sharing ideas.8 options!
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Dominique Baker @bakerdphd.bsky.social · 16/10/2025
PENN IS OUT! That means both institutions that signed prior agreements with the administration have said no. We're at 3 rejections. I told y'all once the second one hit yesterday, the clock started for the rest. www.thedp.com/article/2025...
thedp.com
Penn rejects White House proposal for special funding treatment
With the decision, Penn becomes the third university to decline the offer.
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Jacob T. Levy @jacobtlevy.bsky.social · 15/10/2025
Brown rejected the compact! www.brown.edu/sites/defaul...
brown.edu
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Ryan Flessner @ryanflessner.bsky.social · 15/10/2025
Second set of fun with friends at #NCSM25! @annieforest.bsky.social @iteachthewhy.bsky.social @cluzniak.bsky.social @mandymathed.bsky.social @coreydrake @cfless.bsky.social @kourtneypeters @kimmontague.bsky.social @pwharris.bsky.social
Ryan with Annie Forest and Laura Tomas. Ryan with Chris Luzniak and Mandy Jensen.Ryan with Corey Drake. Ryan with Courtney Flessner and the “Math is Figureoutable” crew: Kourtney Peters, Kim Montague, and Pam Harris.
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Mandy Jansen @mandymathed.bsky.social · 14/10/2025
I so appreciated the community who attended our session: How can math class save democracy? Thanks to @cluzniak.bsky.social for being an amazing collaborator for our session at @mathedleaders.bsky.social #NCSMRiseUp
Chris Luzniak and Mandy Jansen in front of a title slide that says, how can math class save democracy?Group selfie! An “ussie”
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Mandy Jansen @mandymathed.bsky.social · 13/10/2025
Looking forward to presenting on Tuesday, Oct 14, at 2:15 pm @mathedleaders.bsky.social with @cluzniak.bsky.social!
Two smiling friends!How can math class save democracy? See Chris Luzniak and Mandy Jansen co-present at NCSM on Tuesday, Oct 14, at 2:15 pm
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Mandy Jansen @mandymathed.bsky.social · 13/10/2025
I loved Vanessa and Peter’s session at #NCSMRiseUp ! Who knew that Orange and Pink would go so well together. 💕🧡 @themathguru.bsky.social
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Shelby Strong 💗💜💙 @sneffleupagus.bsky.social · 13/10/2025
Dr. Ladson-Billings details four things that challenge poor students and students of color in mathematics. So grateful to be learning from her this morning. #NCSM2025 #NCSMRiseUp
Dr. Gloria Ladson-Billings presenting. Four things that challenge poor students and students of color in mathematics. Belief in mathematics as culture neutral. Limited access to well prepared teachers. Limited access to appropriate curriculum. Limited access to powerful pedagogy.
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Robert Reich @rbreich.bsky.social · 13/10/2025
The 400 richest Americans are now worth a record $6.6 trillion. The entire bottom 50% of America is worth just $4.2 trillion. Read that back. When 400 people control more wealth than half a country’s population, we have a very serious problem.
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Mandy Jansen @mandymathed.bsky.social · 08/10/2025
My undergraduates (middle school math methods) would like advice and insights for teachers' interactions with parents. Teachers or teacher educators, what advice or ideas would you give to these future teachers?
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Nick Covington @covingtonedu.bsky.social · 08/10/2025
Neighborhood schools are closing across Arizona. It’s because of vouchers. "The math is simple: Arizona doesn’t provide enough funding to adequately fund one school system, much less two — a public system open to all and a selective private system." @azmirror.com azmirror.com/2025/10/06/n...
azmirror.com
Neighborhood schools are closing across Arizona. It's because of vouchers.
OPINION: Arizona's $1 billion voucher program is forcing public school closures while subsidizing wealthy families
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