I♥️Learning. ''I arise in the morning torn between a desire to save the world and a desire to savor the world. This makes it hard to plan the day.''- E.B. White
Kansas City, MO
Joined October 2011
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A new process for writing/thinking that I'm trying out
1. New Google Doc, hit record/transcribe
2. Let loose a 2-3 minute stream of thoughts/ideas on a subject, some good some bad. No editing
3. Ask ChatGPT to take those ramblings and turn it into a 500 word blog by @morganhousel
Ramblings Into Readers cdjarrell.posthaven.com/ramb…
Cory Jarrell retweeted
This is the most incredible map of America I’ve ever seen. A literary map of the United States showing where the most famous American novels take place, along with their authors and the years they were published. Make sure to load in 4K!
Cory Jarrell retweeted
When b² − 4ac < 0, the parabola never touches the x-axis. But you can still draw its roots.
Rotate it 180° about the vertex. The flipped curve crosses the axis at (−b ± √(4ac − b²))/2a.
Turn those two points 90° about their midpoint (−b/2a, 0). Treat the plane as complex, and they land on (−b ± i√(4ac − b²))/2a.
Complex roots aren't missing. They're just off the real line.
A colleague and I were chatting between classes about student behavior and I said it felt like they couldn't ignore anything anymore.
Maybe it's just that age and ignoring is a skill to learn with experience.
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Standardized testing is going to come roaring back in importance once colleges figure out that HS grades don't mean anything anymore in some districts.
There's going to be no other signal that separates students from others, even personal essays will all be modal with AI
The teacher who gives a failing grade has to explain it to the student, the parents, and the principal.
The teacher who gives everyone an A has a quiet weekend.
Still confused about how grade inflation has gotten so bad?
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The skill I'm most jealous of in others is the ability to explain things simply, clearly, and concisely. Or Efficient Knowledge Communicators (ekcs).
Think of people like Paul Graham, Grant Sanderson (3b1b), Steven Strogatz, Kyla Scanlon, Neil deGrasse Tyson, roon, etc.
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Cory Jarrell retweeted
Made a little site to learn about architecture, visually
architecture.pascal.app/
Cory Jarrell retweeted
Every college syllabus should include these graphs.
Use AI for homework, you will get it done faster and get a higher grade, and then get crushed on the exam.
Cory Jarrell retweeted
Differentiation gave mathematics a language for changing slopes.
Integration gave it a language for accumulating quantities and areas.
Together, they transformed the study of motion, change, and modern analysis.
Cory Jarrell retweeted
There are a couple of universal patterns that show up across fields that you should apply to pretty much anything:
- Use a written process because memory isn't reliable (see aviation checklists, surgery, mise en place, SOPs...)
- Stop early when something is wrong (Andon cord, feature flags, turnaround time, error budgets...)
- Leave a buffer (Margin of safety, safety stock, taper, defense in depth...)
- Fix the system rather than blame people (Blameless post-mortems, poka-yoke, Swiss cheese model...)
- Get feedback fast (OODA, kaizen, canary releases, after-action reviews...)
- Hand over with a fixed format (SBAR, BLUF, commander's intent...)
- Ramp up gradually (10% rule, canary releases, position sizing....)
Cory Jarrell retweeted
Math needs a phonics-style reckoning. This is a fantastic article by @mattyglesias. Thank you for writing this piece on math and for the shout out. You've explained my position perfectly.
Drilling & mastering the basics isn't the enemy of understanding. It's a prerequisite!
open.substack.com/pub/matthe…
This video from 2 years ago could be improved, so I used ChatGPT and Claude to make attempts and then used Codex with Astra 6 to build off of those attempts.
I think this video is a much simpler and more intuitive way of thinking about the Quadratic Formula.
Cory Jarrell retweeted
For anyone interested, this is called "The Interstellar Experience" by Tony Ann.
Cory Jarrell retweeted
It's mind bending walking around the same place simultaneously in two timelines
Inside the frame it's winter, and outside the frame it's summer - until you step inside.
Recorded this footage in the winter and localized it against a massive 3d scan of the same ranch in the summer. You can follow the camera from the outside, then step into the moment I recorded.
We spend so much time looking at memories through 2d rectangles in our camera roll. It's a strange feeling to walk around one instead. Like navigating through space instead of scrolling through time.
The geospatial memory palace continues to come to life!