#iTeachMath ♾️ For fans of non-standard analysis: In Althea and the Mysteries of Calculus, I hope to use the simplest possible proofs. Some use limits, others use infinitesimals. As much as possible, I'd like to use infinitesimals. Email me at [email protected] if interested.

#iTeachMath ♾️ Do you enjoy playing around with math over the holidays? You might enjoy reading my (close to done) manuscript for Althea and the Mysteries of Calculus. And you'd be a big help to me. The math parts are done (except for fixing mistakes). Email me at [email protected]

We love duck. I have two perfect portions of duck breast. We were going to have it last night. I defrosted it all day. It was still frozen, so the duck dinner plans changed. Today. No problem. 1/2

Putting the 4th quarter #MathPlay blog carnival together. Anything you've made or written that you want to share? Anything you've read or watched that you want to share?

Rest In Power, this is service to all. Extraordinary 🙌

4th repost. New bit? Her mom, Kristi Fulnecky, is a conservative podcaster. Surprise, surprise.

#iTeachMath ♾️ Look at the red one. Why is Desmos giving a curve here, instead of a straight line. (Adding parentheses fixes it, but what's happening?!) www.desmos.com/calculator/m...

What is your favorite news source? (I follow Heather Cox Richardson - way too positive and Democracy Now - great. I often check The Guardian.)

I've been here daily for over a month. I guess I'm not following enough people. I want to see more news. And I follow I teach math, but there aren't enough posts on that to satisfy me. I also miss (from fb, which booted me off for no obvious reason) actual conversations. 1/2

Yeah, this is the 3rd time I'm posting this. Each time, there's an added bit that infuriates me.

If you’re wondering why your friends in academia are a little on edge right now, it’s because an eighteen-year-old who hasn’t done the reading, doesn’t look at the assignment, and has does no critical thinking skills more complex than “because I think it’s in the Bible” can literally end your career

"Capitalism has a notorious tendency to periodically come spinning apart. Each time it does, those who profit from it have to convince everyone there is really no choice but to dutifully paste it all back together again, in something like the original form." - David Graeber

The only thing we can imagine is catastrophe. davidgraeber.org/articles/the...

#iTeachMath ♾️ Scene from Althea and the Mysteries of Calculus: Sofia steps up, and says, “We start with the definition. It’s like the slope, but we use f of x plus h and f of x, instead of y2 and y1. So we’d have this. It’s pretty ugly, do you think it’s right?" [equation here] 1/x

“Why isn’t there a White History Month?” Because every month is White History Month. History is written by the victors — and colonizers. Much of the American history and literature we learned for generations erased the contributions of marginalized groups. open.substack.com/pub/jesspipe...

#MathsToday #ALevelMaths #FurtherMaths Find the exact area of the snowflake.

#iTeachMath ♾️ Want a nice hard puzzle for the holidays? This (the 2nd puzzle in the post) was in Games magazine in 1992. Enjoy! mathmamawrites.blogspot.com/2009/12/holi...

A graduate teaching assistant who gave a University of Oklahoma student a failing grade on a psychology essay will no longer be teaching at the university

TIL: The area of the parabolic segment between x=A and x=A+B depends *only* upon the value of B. This applies to any quadratic. h/t The Genius of Gaudi, Alsina and Nelson, MAA Press, p25. #iteachmath #mathtoday A Desmos illustration: www.desmos.com/calculator/o...

I got this link 3 years ago. It looks fun. I saw that it was from Steve Phelps, and followed him just now. @mathtechcoach.bsky.social I took a screenshot of what I did with it. It's in the first comment. www.desmos.com/calculator/9...

What a mess! Wyoming has some of the least competitive ACA markets in the country. In places like Teton County, there has often been only one ACA insurer (Blue Cross Blue Shield of Wyoming). That lack of competition drives prices way up. This is ridiculous.

Happy solstice to all! The sun is coming back now. (Since 6:03am California time.) My chickens will be so happy. It's gonna rain for at least the next week, so I don't know when I'll get to see this alleged sun. But I guess I have to trust that it's there.

I saw a Waymo follow the car in front of it and just blast through an intersection rather than treat it like a four-way stop and stop because the traffic light was out this afternoon.

Legal analyst Elie Mystal explains how Trump's latest executive order upended the Civil Rights Act. When it comes to civil rights violations or discrimination claims, the DOJ will no longer consider one specific kind of evidence: Math

A board of commissioners in North Carolina decided earlier this month to dissolve the entire library board of trustees in response to that board refusing to remove a single book featuring a transgender child character from the shelves.

“The thing that’s been the most difficult so far is that, in all of our interactions with the government, they’re denying that any of her birth certificates, which are from Laurel, Maryland, her records of immunization, medical records — they’re denying the authenticity of them.”

It's fabulous that I don't have cancer. That little journey of mine included some cooking lessons (because eating keto can perhaps help with cancer, and I wanted to eat some yummy keto). Lesson 3 was this evening, and I've posted about it. andalltherestofsue.blogspot.com/2025/12/no-l...

You'll need to click through to Alt NPS to get it.

I'm not sure if people realize the murder strikes are taking place across a large region. It's quite staggering. www.newsweek.com/map-us-strik...

There was a tiktok account that showed the architecture around the country built for segregation that are hidden in plain sight. Like walk up windows at diners, separate entrances at movie theaters, etc.

Do we feel safe yet

#iTeachMath Playing with Math: Stories from Math Circles, Homeschoolers, and Passionate Teachers was published in 2015. It will still wow you, I bet. It's a great compilation of some of the amazing math activity online between 2008 and 2014. Good gift for parents. naturalmath.com/playingwithm...

Looking good! The oncologist does not think this thing in my arm is cancer. No bone biopsy needed. andalltherestofsue.blogspot.com/2025/12/this...

I tried to be funny when making questions like this. This is so much better than my creations!

#iTeachMath What is calculus? Calculus lets us find slopes and areas when there are curves involved. It sounds simple, so why do most people think calculus is so hard? 1/3

Dang. None of the candidates for governor of California sound good to me. I want a real progressive. calmatters.org/politics/202...

Those tree hugging hippies in Hungary now lead the world in the share of electricity generated from solar with almost 25% of their electricity coming from solar in 2024. A remarkable leap from just 7% five years ago.

U.S. pals: Do. Not. Donate. To. Salvation. Army. There are better charities out there. Much better.

The Trump administration's bellicose conduct toward Venezuela and other leaders in Latin America has little to do with drug trafficking, says historian Alejandro Velasco. It's an effort "to get rid of leftist governments in the region," he says.

WOW. @haleaziz.bsky.social with a new scoop: ICE now gets a running list of every person who is going to be taking a domestic flight inside the United States from the TSA and runs it through their database looking for targets. This explains the Babson College student's arrest.

Good news. I won't know for sure until I can get that bone biopsy, but MRI results today say "... compatible with a benign lesion ... No evidence of aggressive features." blog post: andalltherestofsue.blogspot.com/2025/12/this...

#mathgame idea (inspired by terrytao.wordpress.com/2025/12/08/t...) Shuffle. Deal each player a face down stack of 10 cards. You flip over a card, which you can keep or discard. Each subsequent card you keep has to be >= last card you took. Winner is player with the largest sum. A=1, K=13.

Really remarkable story. www.reuters.com/world/us/us-...

okay, you guys did GREAT with this last time when it was a grandma in upstate NY. a friend referred a Catholic mom to me in Crystal Lake, IL who has a trans kiddo and gave me her blessing to consult the Bluesky brain trust. they're looking for trans-affirming therapists, family support groups, etc

As a constituent, I am asking that @governorwalz.mn.gov and @keithellison.bsky.social arrest these men and prosecute them before they kidnap someone and intentionally freeze them to death

This is seriously cool.