Field notes
One idea at a time.
Short, precise articles from the instructors, each tied to the course it belongs to.
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Field notes
Short, precise articles from the instructors, each tied to the course it belongs to.
Learning Science
Trying to answer before you have been taught improves what you learn next, even when your guesses are wrong, provided the right answer follows.
Learning Science
Doing all the problems of one kind before the next feels efficient. Mixing kinds made practice harder and tripled scores on a test a week later.
Learning Science
Students in active classes learned more but felt they learned less. Why fluency misleads us, and how to study against the grain of your own intuition.
Learning Science
Across millions of viewing sessions, learners watched short videos to the end and abandoned long ones. Putting a question between segments roughly halved mind wandering.
Learning Science
Pulling an answer out of memory changes the memory. Students who were tested remembered more a week later than students who reread, even though rereading won in the short run.
Learning Science
The same study time, spread out, beats one long session. The best gap depends on how long you need to remember, and research tells us roughly how to pick it.
Inside Vortex
Vortex organizes other people's teaching, so how it treats that work matters. What we do, what we never do, and where the line sits.
Inside Vortex
Where every secret lives, which way requests are allowed to flow, and the ordered checks each write passes before it touches the dataset.
Inside Vortex
Two workspaces, one private dataset, and a search pipeline where the language model proposes and the database decides.
Inside Vortex
YouTube already holds world-class teaching. What it lacks is the structure that turns watching into learning: order, checkpoints and a way to know you got it.
Data
An index is a guess about how the planner will run a query. EXPLAIN ANALYZE turns the guess into a measurement, and it takes seconds.
AI Engineering
Pick chunk sizes from the questions you expect, not from what fits the database. The unit you retrieve is the unit the model gets to reason over.
Web Development
Most caching surprises in the App Router come from one question the framework asks about every route: can this be rendered before a request arrives?
Account
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