Sam Tobin-Hochstadt
@samth.bsky.social
Associate Professor, IU Computer Science ·
Core Developer, @racketlang.bsky.social ·
Member, TC39 ·
Handler, Gravymaker ·
Bike Advocate, Bloomington IN
Core Developer, @racketlang.bsky.social ·
Member, TC39 ·
Handler, Gravymaker ·
Bike Advocate, Bloomington IN
The Androscoggin in Lewiston
January 12, 2026 at 8:51 PM
The Androscoggin in Lewiston
Here's a scatter plot of final exam grade vs a heuristic "AI score" for students in my intro class (for maximum irony the scoring program and data analysis were written by AI).
There was less correlation than I expected and lots of people with a score of 0.
There was less correlation than I expected and lots of people with a score of 0.
January 8, 2026 at 12:49 AM
Here's a scatter plot of final exam grade vs a heuristic "AI score" for students in my intro class (for maximum irony the scoring program and data analysis were written by AI).
There was less correlation than I expected and lots of people with a score of 0.
There was less correlation than I expected and lots of people with a score of 0.
It's more than just generalizing from yourself, it's that constructivism being true is a very nice thing to think about teaching and learning and students.
Think about the slogan in this image, which is on many teachers' walls:
Think about the slogan in this image, which is on many teachers' walls:
December 22, 2025 at 11:32 PM
It's more than just generalizing from yourself, it's that constructivism being true is a very nice thing to think about teaching and learning and students.
Think about the slogan in this image, which is on many teachers' walls:
Think about the slogan in this image, which is on many teachers' walls:
My kids doing the equity meme
November 28, 2025 at 7:44 PM
My kids doing the equity meme
This is the entire elite college admissions debate summed up in a single figure.
November 24, 2025 at 11:33 PM
This is the entire elite college admissions debate summed up in a single figure.
Here's what @mattyglesias.bsky.social wrote about it:
November 18, 2025 at 10:20 PM
Here's what @mattyglesias.bsky.social wrote about it:
In 2009 on reddit I was apparently already jaded about telling people about the relationship between scheme and lisp macro systems. Another vote for "nothing ever changes"
October 23, 2025 at 1:48 AM
In 2009 on reddit I was apparently already jaded about telling people about the relationship between scheme and lisp macro systems. Another vote for "nothing ever changes"
No Kings, Bloomington Indiana
Biggest protest yet here
Biggest protest yet here
October 18, 2025 at 7:10 PM
No Kings, Bloomington Indiana
Biggest protest yet here
Biggest protest yet here
The actual number of hours that Americans work hasn't changed much over the last 20 years.
October 7, 2025 at 4:07 AM
The actual number of hours that Americans work hasn't changed much over the last 20 years.
Seems like 20% normal disagreement, 50% dunks, 20% agreement, and 10% this stuff.
September 13, 2025 at 7:15 PM
Seems like 20% normal disagreement, 50% dunks, 20% agreement, and 10% this stuff.
Like, Bluesky is you and me arguing about other people on the left yelling at Yglesias, and Twitter is this:
September 13, 2025 at 6:54 PM
Like, Bluesky is you and me arguing about other people on the left yelling at Yglesias, and Twitter is this:
Yes, this is genuinely an important Abundance value-add.
September 4, 2025 at 6:56 PM
Yes, this is genuinely an important Abundance value-add.
Meanwhile my representative is less chaotic but just as bad:
July 2, 2025 at 9:02 PM
Meanwhile my representative is less chaotic but just as bad:
There's a lot, good and bad, to say about AI, but this is still pretty incredible.
June 28, 2025 at 2:22 AM
There's a lot, good and bad, to say about AI, but this is still pretty incredible.
Over the 10 days, I wrote a new Racket library for "expect testing", a style that @yminsky.bsky.social has advocated for in OCaml. github.com/samth/recspe...
As an experiment, I built it entirely with Codex (the OpenAI async AI programming tool). I have some thoughts.
As an experiment, I built it entirely with Codex (the OpenAI async AI programming tool). I have some thoughts.
June 17, 2025 at 3:31 PM
Over the 10 days, I wrote a new Racket library for "expect testing", a style that @yminsky.bsky.social has advocated for in OCaml. github.com/samth/recspe...
As an experiment, I built it entirely with Codex (the OpenAI async AI programming tool). I have some thoughts.
As an experiment, I built it entirely with Codex (the OpenAI async AI programming tool). I have some thoughts.
The Clear Creek post office
May 17, 2025 at 12:36 AM
The Clear Creek post office
Redex does something like this for some things.
May 12, 2025 at 9:05 PM
Redex does something like this for some things.
While that's definitely part of the motivation for creating it, I think this picture suggests other structural reasons not specific to US history.
April 25, 2025 at 2:25 AM
While that's definitely part of the motivation for creating it, I think this picture suggests other structural reasons not specific to US history.
Here's a shot from Google Maps, for example:
April 10, 2025 at 9:16 PM
Here's a shot from Google Maps, for example:
