Why exam practice questions beat rereading your notes

Rereading notes and highlighting feel productive. The page looks familiar, so it feels like you know it. But recognising something and being able to produce it in an exam are not the same thing, and the exam only rewards the second.

Why answering questions works better than rereading

When you try to answer a question, you have to pull the information out of your memory. That act of retrieving it is what makes the memory stronger. Psychologists call this the testing effect, or retrieval practice, and it is one of the most consistently supported findings in learning research.

A well-known study by Roediger and Karpicke in 2006 compared students who reread a passage with students who practised recalling it. On a test straight away, the rereaders did slightly better. A week later, the students who had practised recalling it remembered considerably more. Rereading helped in the short term. Retrieval helped it last.

Practice questions do three things notes cannot

They show you what you actually do not know

Notes never tell you that you have a gap. A question does, immediately. If you cannot explain why a denatured enzyme stops working, you find out in two minutes rather than in the exam hall.

They train the wording that earns marks

A-Level mark schemes credit specific ideas expressed in specific ways. Answering questions and then reading the mark scheme teaches you that wording far faster than reading a textbook. You start to notice, for example, that a scheme wants "water potential" and not "water concentration".

They build exam timing

Each mark is worth roughly a minute or a little more in most A-Level science papers. You only learn how long a 6-mark answer takes by writing them.

How to practise so it actually works

• Answer before you look. Write a full answer, even a bad one, before you check anything. The effort of trying is where the learning happens.
• Mark yourself honestly. Tick only the points you actually wrote, not the ones you meant. Our guide on how to use mark schemes covers this in detail.
• Space it out. Come back to a topic a few days later, then a week later. Forgetting a little between sessions makes the next retrieval more effective.
• Mix topics. Switching between topics in one session, rather than doing twenty questions on one thing, is harder but helps you recognise which idea a question is testing.
• Keep a list of what you miss. The mark points you drop repeatedly are your real revision list.

Where notes still fit in

Notes are for understanding a topic the first time and for filling the gaps your practice reveals. A good rhythm is: read a short revision note, close it, answer questions on it, then go back to the note only for the parts you got wrong.

Start with one topic

Pick the topic you feel least sure about and answer three questions on it today. On ExamKata, every question comes with the full mark scheme, and your stats show which topics have gone cold so you know what to retrieve next.