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How to Revise From Lecture Recordings Without Rewatching

Lecture recordings are a good source for revision, but listening to them again is one of the weakest ways to use them. Here is how to turn them into something you can actually test yourself on.

Benjamin Tindal 6 min read

If your university records lectures, you probably have hours of them sitting on Panopto, Echo360 or a similar platform. The tempting plan is to play them back at 1.5x speed in the weeks before exams. It feels like work, and it does refresh your memory. The trouble is that the feeling does not last until the exam.

This guide is a method for using recordings properly: as raw material you turn into questions, not as something to sit through again.

Why rewatching feels productive but often isn't

Rewatching a lecture is the video version of rereading your notes. In a large review of ten common study techniques, Dunlosky and colleagues rated rereading and highlighting as low utility, and rated practice testing and spreading study out over time as high utility (Dunlosky et al., 2013).

The difference shows up after a delay. In one well-known experiment, students who restudied a passage did better on a test five minutes later, but students who had tested themselves instead remembered more two days and one week later (Roediger and Karpicke, 2006). The restudying group was also more confident, which is exactly why rewatching is so appealing.

None of this means recordings are a bad idea. A study that followed students through four years of an undergraduate degree found that, in first year, both attending lectures and using the recordings predicted better marks, and it found no compelling evidence that using recordings did harm (Nordmann, Calder, Bishop et al., 2018). The same research group recommends treating recordings as a catch-up and revision aid that works alongside attendance and good note-taking, not instead of them (Nordmann, Küpper-Tetzel, Robson et al., 2022).

So keep the recordings. Just change what you do with them.

Step 1: Get each lecture into a form you can skim

Audio is slow to search. You cannot glance at minute 34 the way you glance at page 3. Before revising, get each lecture into text:

  • Use what your university already gives you. Many lecture capture platforms produce captions or a transcript. Check your VLE before doing anything else.
  • Pair it with the slides. Slides tell you the structure the lecturer planned. The transcript tells you what they actually stressed.
  • Keep the timestamps. You will want to jump back to the exact moment later, so a transcript with times is far more useful than one without.

If you record lectures yourself, check your university's policy first and never share the recording. We cover the rules in can you record lectures at a UK university.

Step 2: Build a one-page map of each lecture

For each lecture, make one page, no more. Skim the transcript and slides and write down:

  • The three to six main ideas, as headings.
  • Definitions and key terms, word for word where precision matters.
  • What the lecturer flagged. Listen for phrases like "this comes up every year", "a common mistake is" or "you need to be able to explain". These are as close to a hint as you will get.
  • Links to other lectures. Exam questions often cross topics, so note where one week builds on another.

The point of the map is to compress an hour into something you can hold in your head. It is not the revision itself. Writing a summary is useful for getting organised, but on its own it was also rated low utility in the review above, so do not stop here.

Step 3: Turn the map into questions

This is the step most people skip, and it is the one that matters most. Take every line of your map and turn it into something you have to answer from memory.

Facts and definitions: flashcards

Anything with a single right answer goes on a flashcard: a definition, a date, a formula, the name of a theory and who proposed it. Keep each card to one idea. "What are the three stages of X?" is fine. "Explain X" is too big for a card.

Concepts and arguments: questions with explanations

For ideas you need to understand, not just recall, write questions that make you choose or explain. Multiple-choice questions are useful if the wrong options are plausible mistakes, and if you write down why each wrong option is wrong. That explanation is where the learning happens.

Exam-style practice: past papers

Your department's past papers show how questions are actually asked. Once you have worked through a topic, attempt a past question on it without your notes, then check against your map.

Testing yourself also helps with more than facts. In one study, students who practised recalling a science text did better on questions that required inference than students who spent the same time building a concept map with the text in front of them (Karpicke and Blunt, 2011).

Step 4: Space your reviews out

Answering your questions once is not enough. Come back to them several times, with gaps in between. A meta-analysis of hundreds of experiments found that spreading study sessions out beats massing them together, and that the best gap grows the longer you need to remember something (Cepeda et al., 2006).

The same holds for flashcards specifically. In one set of experiments, studying one large deck spread over time beat cramming for 90% of participants, yet after the first session 72% believed cramming had worked better (Kornell, 2009). Spacing feels harder, which is why people avoid it.

A simple schedule for one lecture:

  1. Make the questions within a few days of the lecture.
  2. Review them a few days later.
  3. Review again after about a week, then after a few weeks.
  4. Each time, drop the questions you get right easily and focus on the ones you miss.

Flashcard apps with spaced repetition do this scheduling for you, which saves you keeping track by hand.

Step 5: Go back to the recording only for the gaps

Now the recordings earn their place. When you keep getting a question wrong, or you realise you never understood a topic, find that moment in the transcript and play just those few minutes. Five targeted minutes of audio are worth more than an hour played in the background.

Timing it for January and May exams

Many UK universities hold exams in January, for autumn modules, and in May, for the main summer period. Spacing needs calendar time, so work backwards:

  • About six weeks before: finish your maps and questions for every lecture. For January exams that means mid-November, before the end of term gets busy.
  • Four to two weeks before: review on a schedule, mixing modules, and start past papers.
  • The final week: past papers under timed conditions, plus your hardest flashcards. Do not start new material.

If you can keep up during term, even better: ten minutes after each lecture to make the map and questions means revision season is mostly review.

If you're already behind

If the exam is close and you have weeks of lectures you never properly covered, triage before you start:

  1. Check what is assessed. Module handbooks list learning outcomes, and past papers show which topics come up. Rank the lectures by how much they matter.
  2. Map the top half first. Make one-page maps for the most important lectures, using the transcripts rather than playing the audio.
  3. Questions before completeness. It is better to have tested yourself on eight lectures than to have neat notes on twelve.
  4. Fill in the rest if time allows.

For a backlog during term rather than right before an exam, see how to catch up on lectures without rewatching.

Where NoteMate fits

NoteMate does steps one to four from the audio itself. You record or upload a lecture, and it produces a timestamped transcript, structured notes, flashcards scheduled with spaced repetition, and a multiple-choice quiz with an explanation for every option. If you already have a transcript, the free lecture-to-flashcards tool turns it into cards without an account.

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