Online learning has been thoroughly colonised by the course. There is a curriculum, a login, a progress percentage, and a certificate at the end that nobody will ever ask to see. It is an enormous amount of structure around the simple act of finding something out.
The older format is better for most things: one page, one subject, explained properly, finished in ten minutes. You learn the thing and then you go away.
What the format does well
A single explanatory page has one job, so it tends to do it honestly. There is no reason to pad it out to fill a module, no incentive to withhold the good part for the paid tier, and no drip schedule. The author explains the thing and stops.
It also respects the actual shape of most curiosity. You rarely want to learn a discipline. You want to know why the sky does that, or how the thing in your kitchen works, and then you want to get on with your day.

The formats that work best
Explorable explanations. The single most effective thing the web added to teaching. You are given a diagram with sliders, you drag them, and you watch the system respond. You end up understanding the relationship rather than memorising a formula, because you have personally broken it a few times.
Scrollable scale. Pages that use distance to convey size โ the solar system at true scale, the depth of the ocean, the size of a cell. The insight comes from the scrolling itself, which no paragraph can substitute for.
Single-concept essays. Someone who understands one thing deeply writing it down clearly. Unfashionable, unbeatable.
Interactive walkthroughs. Ciphers, sorting algorithms, chord progressions, knots. Anything where the process matters more than the definition.

How to spot a good one quickly
- It states the thing early. Good explainers give you the conclusion in the first two paragraphs and then justify it. Bad ones withhold it to keep you scrolling.
- It has one subject. A page called “Everything you need to know about X” is usually a page about nothing.
- The diagrams are custom. Someone who drew their own diagram understood the material. Stock imagery is a tell.
- It admits what it is skipping. “This is a simplification, here is where it breaks down” is the sign of an author who actually knows.
- No account. If the explanation requires a login, the explanation is not the product.
The subjects this works best for
Not everything fits in ten minutes, and it is worth being honest about which things do.
Mechanisms. Anything where the answer is “here is how the parts move” โ locks, engines, encryption, voting systems, how a river meander forms. A diagram you can poke beats an hour of description.
Scale and proportion. Distances, populations, quantities, probabilities. These are things people reliably get wrong by orders of magnitude, and a single well-built page fixes the intuition permanently.
Common misconceptions. The format is ideal for “you have probably been told X; here is what is actually going on”, because the correction is the entire payload.
What does not fit is skill. You cannot learn to play an instrument, write code or speak a language from a ten-minute page, and pages claiming otherwise are selling something. Understanding is fast; competence is not.
What to do with it afterwards
The weakness of learning this way is that it evaporates. You read a superb explanation, feel the click of understanding, and a fortnight later retain only that the thing was interesting.
The cheap fix is to write one sentence in your own words somewhere you will see it again. Not notes, not a system โ one sentence. The act of compressing it is what makes it stick, and it takes about twenty seconds.
The other fix is to explain it to somebody, which exposes immediately whether you understood it or merely enjoyed it. Those are very different states and they feel identical from the inside.
Where they come from
Overwhelmingly from individuals. University pages, personal blogs, a researcher’s side project, someone’s frustration at every existing explanation being bad. Very few come from education companies, because a page you finish is a terrible business model.
That also means they are scattered and poorly indexed, which is the same discovery problem covered in how to find weird websites yourself. The same techniques apply.
The ten-minute rule is doing real work
Ten minutes is roughly the amount of attention you can give something on a whim, without scheduling it. That is the difference between learning a lot of small things over a year and learning nothing while intending to take a course.
If you want the same shape of thing but even shorter, our short online quizzes piece covers the version where you find out what you already knew โ which is its own kind of useful.