How to take notes you'll actually study from

Open your notes from six weeks ago. Really open them. For most people the experience is somewhere between "who wrote this" and "these are just the slides, but worse".

That's the core problem with how note-taking is taught. We're graded on attendance and never on whether the artefact we produced is any use afterwards, so notes drift into being a transcript — a record that the lecture happened. Transcripts are lousy study material. You can't quiz yourself on a transcript.

Here's what to change instead.

1. Write questions in the margin, not just statements

This is the highest-leverage habit in the whole list, and it's the one nobody does.

Every time you write down a fact, add a question next to it that the fact answers. "Mitochondria produce ATP via oxidative phosphorylation" becomes, in the margin: How do mitochondria produce ATP?

Two things happen. First, forming the question forces you to decide what the point of the sentence actually was, which is most of the understanding right there. Second — and this is the payoff — your notes are now a test. Cover the right-hand side and you have an exam paper that you wrote yourself.

This is the engine inside the Cornell method, which has been taught since the 1950s and survives because that one column does real work.

2. Capture the source, transcribe less

You cannot write as fast as a lecturer talks, and trying is actively harmful — you end up in stenographer mode, copying sounds instead of following the argument.

So stop competing. Photograph the slide, the whiteboard, the diagram. It takes a second and it's a perfect copy. Then use the hand you just freed up to write the thing a camera can't capture: what the lecturer said about it, what confused you, what they hinted would be on the exam.

There's a long-running debate about whether handwriting beats typing for retention. The honest state of the evidence is: it's mixed, and later replications have muddied the famous early results. What consistently matters more is whether you were processing the material or just relaying it. Photograph the relayable bits and spend your attention on the rest.

3. Do a five-minute pass the same day

Not a rewrite. Not a beautiful colour-coded reconstruction. Five minutes, same day, doing three things:

• Add the margin questions you didn't have time for in the room.
• Mark the two or three things you genuinely didn't follow. A question mark is fine.
• Write one sentence at the top: what was this lecture for?

The same-day part matters. Forgetting is steepest in the first day, so this is the cheapest moment to lock in context you'd otherwise spend twenty minutes reconstructing in December.

4. Convert to cards before you need them, not after

The standard failure mode is: take notes all term, then start making flashcards the week of the exam, run out of time on chapter four, and study only what you managed to convert.

Flip it. Convert each lecture into questions while it's fresh — that's the same-day pass, extended by a few minutes. By exam week you're revising, not manufacturing.

The objection is fair: writing cards by hand is slow, and after a full day of lectures nobody has another forty minutes in them. That's precisely why this step gets skipped, and why it's the one worth automating. Photograph the page and let SnapDeck AI generate the question-and-answer pairs — it runs on your phone, offline, so it works on the walk home. Read what it produced, fix the two cards it got wrong, done in the time it takes to get to the bus stop.

What good notes look like

They're shorter than you'd expect. They contain more question marks than a transcript. They have photos attached rather than laboured redrawings of a diagram. And crucially, they can be used without being re-read — you can open them, cover one side, and immediately find out what you don't know.

That last property is the whole test. If your notes can't tell you what you don't know, they're a souvenir of the lecture, not a study tool.

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The short version: photograph what a camera can copy, write what it can't, phrase it as questions, and spend five minutes the same day making it usable. Then exam week is about answering questions instead of writing them.