How to Turn Lectures Into Practice Questions (Recorded, Live or YouTube)

You sit through an hour of lecture, take notes as fast as you can, and walk out feeling like you got it. A week later, most of it has gone. That's not a personal failing — it's how memory works. Without review, newly learned material fades fastest in the first few days.

The fix is to turn each lecture into practice questions the same day and come back to them over the following weeks. This guide covers how to capture a lecture, how to get questions from it, and how to keep them working for you until the exam.

Why lectures slip away

A lecture is a one-way stream of information at the lecturer's pace. You're mostly listening and copying — passive activities. Your notes capture fragments, and you rarely look at them again until revision week, when they no longer make sense.

What turns a lecture into memory is retrieval: answering questions about it, from memory, soon after and again later. In Roediger and Karpicke's 2006 study, testing yourself on material led to substantially better recall a week later than restudying it. And the right gap between sessions grows with how long you need to remember: Cepeda and colleagues (2008) found that spacing reviews out — rather than cramming them together — makes memories last.

Step 1: Capture the lecture well

If recording is allowed

Record the audio and take lighter notes. Instead of writing everything, mark the moments that matter:

• definitions and key terms
• anything the lecturer repeats or emphasises
• "this will be on the exam"
• worked examples and diagrams on the board — take a photo

The recording gives you completeness. Your marks tell you what's important.

If recording isn't allowed

Take notes in a question-friendly layout. The Cornell format — a narrow column on the left for questions, notes on the right — is ideal: after the lecture, you fill the left column with questions about the notes.

If it's a video

Recorded lectures and YouTube explainers are easier: the transcript is often available, and you can pause. The trap is watching passively at 2× speed and calling it studying.

Step 2: Turn it into questions the same day

Aim for 10–20 questions per lecture, covering every major point. Good lecture questions:

• test the ideas the lecturer emphasised, not throwaway asides
• ask why and how, not just what ("Why does the lecturer say X matters?")
• include worked examples — redo the board example from scratch
• link back to the moment in the lecture or the page in the slides, so you can check

Writing questions yourself is valuable but slow. If you have a recording or transcript, AI can draft them in minutes — then you check and edit.

Step 3: Answer them, then come back

Answer the questions that evening, without notes. Check each answer. Then come back to them a couple of days later, then a week later, then a few weeks later, focusing on the ones you got wrong. This is spaced repetition, and it's what carries a lecture from Tuesday to the exam.

Lectures in DeepRevision

DeepRevision has lecture capture built in, designed around exactly this loop.

• Record in the room (or upload audio you already have). The live transcript stays synced to the audio.
• Mark the moments that matter and snap the board as you go. Your marks and photos sit on the lecture's timeline.
• That evening, the lecture turns into practice questions written from what was actually said.
• YouTube links work too: paste a link and practise on what the video actually says.
• Any lecture can become a mind map of its ideas, and you can teach back any moment from it in your own words.
• Every question is scheduled for review and every wrong answer is kept, so the lecture keeps coming back until you know it.

A weekly lecture routine

Ten lectures reviewed like this are worth more than forty rewatched the week before the exam.