Preparing for A-levels well comes down to four things: choosing the right subjects, keeping the number manageable so you can go deep rather than wide, building good revision habits from the start of Year 12, and testing yourself actively rather than passively re-reading notes. Get those foundations right and the two years ahead become far more manageable.
As an LSE Economics graduate and co-founder of a specialist GCSE and A-level tutoring agency, Harry Godfrey has spent years advising students and families through the A-level journey. Here is his advice, starting with the question he gets asked most often.
Should I take three or four A-levels?
For the large majority of students, three A-levels done really well will serve you better than four done adequately. Universities make their offers based on three subjects, so a fourth rarely strengthens an application and can weaken it if your grades slip under the extra load.
I speak from experience. I took four: Maths, Further Maths, Psychology and Economics. Joe, the other co-founder of The Degree Gap, took three: Business, Geography and Economics. We both came out with A* and A grades. Looking back, I wish I had taken three. Carrying a fourth subject meant my revision time was sliced into smaller and smaller pieces, and I often felt I could not give Economics the attention it needed.
There are exceptions where four makes sense: if you are naturally quick to absorb material, genuinely interested in all four subjects, or have a specific reason to keep your university options as wide as possible. For everyone else, three done properly is the right call.
Which A-levels should I choose?
Choose the subjects you are most genuinely interested in. A-levels are a significant step up from GCSE, and studying something you do not care about puts you at a real disadvantage, because almost nothing goes in on the first pass.
That said, if you are thinking strategically about competitive universities, Maths is one of the strongest subjects you can carry forward. It keeps the widest range of doors open, particularly for quantitative degrees. As a tutor I have worked with plenty of students who skipped A-level Maths, went on to a degree like Economics, and then spent the year playing catch-up on top of their actual course.
What is the difference between GCSE and A-level?
The biggest difference is depth. A-level goes much further into each topic than GCSE, and that depth means you can fall behind surprisingly quickly if you are not consolidating as you go. At GCSE you can often revise intensively in the final months and still do well. At A-level, the volume and difficulty make that far riskier.
The jump can feel sudden, particularly in the first term of Year 12. Students who were comfortably top of their GCSE sets sometimes find the step up more challenging than expected. That is completely normal. The key is to flag gaps early and get help quickly rather than hoping things click into place on their own.
How should I prepare for A-levels over the summer?
The best thing you can do over the summer before Year 12 is shore up any GCSE topics you found shaky, especially in subjects that build directly on prior knowledge, like Maths and the sciences. You do not need to race ahead into the A-level syllabus. You just want to start Year 12 without gaps underneath you.
Beyond the academic, use the summer to think about how you will organise your study time once term starts. A-levels require far more independent study than GCSE, and students who go into Year 12 with a plan for how they will manage their time, where they will study and how they will track their progress, tend to find the transition much smoother.
What are the best ways to revise for A-levels?
The single most effective revision method is active recall: testing yourself and retrieving information from memory, rather than re-reading notes until they feel familiar. Familiarity is not the same as being able to produce an answer in an exam, and that gap catches a lot of students out.
A few techniques that work:
Active recall. Close the book and write down everything you can remember on a topic, then check what you missed. It feels harder than re-reading because it is doing more, and that effort is exactly what makes it work.
Spaced repetition. Review a topic the day after you first study it, then a few days later, then a week later. Spacing your revision out interrupts forgetting and moves material into long-term memory far more efficiently than cramming.
Past papers, used properly. Do past papers under timed conditions, then mark them against the official mark scheme. Treat the mark scheme as data, not a verdict: it tells you exactly what the examiner rewards and where you are dropping marks, so your next session targets the real weak spots rather than the topics you already know.
Focused blocks. Work in sessions of around 25 to 50 minutes with short breaks between. It keeps concentration sharp and stops the burnout that comes from marathon sessions that drift.
When should I start A-level tutoring?
If you are considering tutoring, start at the beginning of Year 12 rather than leaving it until Year 13. The depth of A-level means gaps compound quickly, and a tutor who joins early can help you build ahead and stay on top of the material as it comes. Students who wait until Year 13 often leave their tutor with a lot of catch-up to play.
For specialist GCSE and A-level tutoring, see School Guide's Tutor Directory.
Frequently asked questions: preparing for A-levels
How many A-levels should I take?
Most students take three, and universities make offers based on three grades. Taking four rarely strengthens an application and can weaken it if your grades suffer under the extra workload. Take four only if you are academically very strong, genuinely interested in all four, or have a specific reason to keep your options open.
Do universities prefer four A-levels over three?
No. Almost all university offers are based on three A-level grades. Strong grades in three subjects, along with wider reading and a good personal statement, count for far more than a fourth subject.
Which A-levels keep the most options open?
Maths is the single most useful subject for keeping doors open, especially for quantitative degrees such as Economics, Engineering and the sciences. Beyond that, choose subjects you are genuinely interested in and that any specific degree you are considering requires.
How hard are A-levels compared to GCSEs?
Significantly harder. The biggest difference is depth – A-level goes much further into each topic, and the volume of material is considerably greater. The jump can feel sudden in the first term of Year 12. Students who consolidate as they go, rather than cramming at the end, consistently outperform those who leave revision late.
How should I prepare for A-levels over the summer?
Focus on strengthening any weak GCSE topics, particularly in subjects that build on prior knowledge like Maths and the sciences. You do not need to get ahead into the A-level syllabus – just make sure you start Year 12 without gaps underneath you. It also helps to think about how you will organise your study time once term begins.
What is the best way to revise for A-levels?
Active recall and spaced repetition, combined with timed past papers marked against the official mark scheme. Testing yourself and fixing your weak spots is far more effective than re-reading notes.
When should I start preparing for A-levels?
Start over the summer before Year 12 by firming up any weak GCSE topics. Then build strong revision habits from the very start of Year 12 rather than leaving them until exam season.
Should I get an A-level tutor?
Tutoring is most effective when started early in Year 12 rather than as a last resort in Year 13. A good tutor helps you build ahead and stay on top of material as it comes, rather than playing catch-up under pressure. See our Tutor Directory for specialist options.
Further reading
How to help your child get good A-level grades
