And #iTeachPhysics folks, I've posted my solutions to the publicly released AP Physics 1 exam on the PrettyGoodPhysics message board. If a teacher would like a copy and isn't on that board, email me and I'll send a PDF!

Why does problem 4 of the AP Physics exams seem to ask the same question twice? This is the qualitative-quantitative translation, where parts (a) and (c) look similar, but are testing very different skills. #iTeachPhysics jacobsphysics.org/2026/05/09/a...

Had convos w/ multiple people in the past 4 days who DID NOT KNOW that 1. AI doesn't "think" or know anything; it's a probability machine 2. It was created using massive amounts of work stolen from actual people including me 3. The environmental costs are astronomical Spread the word, every time!

Hey, Google, I don't want any freakin' Gemini features. I want to be able to access a document in your cloud in less than two minutes. I want to watch something on a Google TV without connecting and disconnecting five different sources of audio and video. You've lost the plot.

Saint Anthony Preaches to the Fish, Girolamo Tessari, 16th c, 📸 by @lindseywasson

Moultrie's technical skill has been on display all day. Look at that lofted pass from the right touchline. Perfectly weighted, and stayed right on the touchline. Ended up a throw for Portland, but might have started a serious attack. #BAONPDX

I mean, I love Sophia Wilson - I own her jersey! - yet even I would ask her to stop chirping indignantly at the referee. Remember what Brittany Spears said: "I'm not that innocent." :-) #BAONPDX

The boys waiting in line to check in on dorm were quite impressed with the Muller goal. Woo-hoo! #BAONPDX

Have I seen Sophia Wilson play under that name as a Thorn?!? I don't think so! (I may just not be remembering... I've only seen one Thorns game this year, and I don't think SW played.) #BAONPDX

Gonna watch the Thorns while I'm on dorm duty tonight. That's great, 'cause I don't get this channel at my house! We'll see if any of the boys watches a bit with me. #BAONPDX

A story, whose denouement explains why I always use random.org *live in front of the class* to choose lab partners. #iTeachPhysics jacobsphysics.org/2026/04/23/a...

When Einstein developed general relativity the closest thing to a practical application that could even be imagined at the time was a slightly more precise description of where to look for the planet Mercury in the sky, and yet now we’d all be literally lost without it. Anyway: fund basic research.

I won a gift certificate at the Vernier booth. I didn’t win what my heart desires - a motion sensor plushie. #iTeachPhysics

First in-park experience of an ABS challenge. Pitch overturned from ball 4 to strike 3. Crowd cheered! No delay, no argument. Loved it.

Take me to church.

Take me to church.

Hanging out with @fpoodry.bsky.social at NSTA. 😀 I only use two hashtags on here, and Fran is familiar both with #iTeachPhysics and #BAONPDX

O there you are Perry

At NSTA Anaheim! Other than the coffee station, what’s caught my eye so far:

Attended the planetarium show at the Smithsonian air and space museum about interstellar space flight. Awful. Non-evidence-based speculation. All-AI animation poorly done. Embarrassing, as now I’ll have to explain to the 90 9th graders why the movie was wrong and science is real. 😡 #iTeachPhysics

The 7th annual Conceptual Physics Summer Institute will be July 31-Aug 1! This is professional development for the sub-AP level. Come join me and 40 colleagues for lab ideas, classroom-ready materials, and fantastic shop talk! $200 per person. #iTeachPhysics jacobsphysics.org/2026/04/08/2...

My only beef with ATL was the time I was accosted by a credit card huckster. She came out of her booth, stood in front of me on the concourse, and loudly started in on the benefits of her card and why I mist sign up NOW! 1/

Go back to black and red, get rid of the Am*zon spy tech sponsor, and I’d buy a Moultrie Thorns shirt right now! #BAONPDX

The 7th annual Conceptual Physics Summer Institute will be July 31-Aug 1! This is professional development for the sub-AP level. Come join me and 40 colleagues for lab ideas, classroom-ready materials, and fantastic shop talk! $200 per person. #iTeachPhysics jacobsphysics.org/2026/04/08/2...

My thoughts exactly, support your team, still so much to play for #GoonerFamily #AFC #Arsenal #COYG

As a physics teacher, this is the part of student AI use that worries me. (Not all of us have decided that things are different this time.) 🎢 🍎 Ref: ergosphere.blog/posts/the-ma...

This is a place for you, @petercashwell.bsky.social and @spuffyduds.bsky.social

About to see The Outsiders musical at Citizens Pera House in Boston. A few thoughts:

Did this AP Physics rubric really award full credit even if the final answer was wrong? It did. Here's the reasoning. #iTeachPhysics jacobsphysics.org/2026/04/04/m...

This is so, so well-articulated.

Are you going to be at NSTA Anaheim Apr. 16-18? I am! The sessions are, um, rather buzzword heavy. So I'd love to meet up with some physics teachers informally. If you'll be there and want to talk shop over coffee, get in touch w/me, contact info via woodberry dot org. #iTeachPhysics

Here's a quick and easy lineariaztion lab for physics 2 electrostatics. #iTeachPhysics jacobsphysics.org/2026/04/01/a...

Wow. Did you hear North London forever in the background at Stamford Bridge? Go Arsenal. #COYG

Crap. James Kerr A.Thompson up front for Chelsea. Arsenal back line has a job to do! #COYG

I’m annoyed that the women’s champions league has a different orchestral anthem from the men’s. #COYG

Do you know who Barry Mano is? He died today. Founder and publisher of Referee Magazine back in the 1970s. Huge, huge influence on the world of officiating. @miketanier.bsky.social

Sam, whenever you or a friend wants to come to the boys’ high school where I teach for a visit and speech, I will arrange. Exactly what Lucy said. (I have run a Central VA Thorns supporters club with some of the boys, but please don’t hold that against me! It’s cause Mark Parsons coached here!)

It’s not aliens.

Wow, Eberichi Eze. Freakin' golazo. Twice he put a waist-high ball on target first-time with speed. First was blocked. On the second shot, no one was in the way. #COYG

As a Manchester United fan I rightly expect absolutely no sympathy for the abject state of my club. I will also say: Wenger's Arsenal overwhelmed Manchester United fair and square, while Chelsea and Manchester City didn't, and football as a whole is still paying a huge price for that.

Chelsea: Actual cheating Man City: Actual cheating Arsenal: Good at corners 'Here's my article on why Arsenal are ruining the game of football'

Woodberry varsity baseball at Blue Ridge has been postponed. Game to be played tomorrow Mar 18 at 4:30. I’ll be on air! Wfspn.mixlr.com

The Woodberry Forest Conceptual Physics Tournament will be held Sunday May 17. We'd love to pay you $100 to join us as a juror. Your students, too, if they've had a year of college-level physics, which includes AP! #iTeachPhysics jacobsphysics.org/2026/03/15/2...

Another satisfying part of rugby: after the try and conversion, kickoff happens within like 15-30 seconds. No time out, no ad break, just ball in play.

Ireland men 19, Scotland men 7 at the half. Yes, I am entertained. This more than fills the hole in my soul left by the lack of NFL football. Better commentary, better game flow, tougher players, way less toxic whining at the referee.

Ireland favored by 5 pts over Scotland. Both teams trade rather beautiful tries in the first seven minutes. Even as new to rugby as I am, I'm seeing the high quality of the match so far. Yay.

This is the sports commentary antidote to last night's, um, rather poorly called NWSL game. Play-by-play has Irish accent, analyst a thick Scottish brogue. Knowledgable folks, using varied idiom. Music to my ears. Next, I want Claire Thomas on American sports.

Time for Men's Six Nations rugby. Ireland v Scotland, sorta for the title (depending on France-England later today). Can't wait for the women's version in April.