Resitting an O Level or International GCSE: how to decide and prepare

A resit is worth it when two things are true: you know why the marks were lost, and there is time to fix it before the next sitting. If either is unclear, work it out before you enter.

Whether you are the student or the parent, talk these through together:

• Does the grade matter for the next step? Check what the school, college or university you are aiming for actually asks for in this subject. Ask them directly rather than relying on what other families say.
• Is it one subject or several? Many students can manage one resit alongside new studies. Several at once is a heavy load.
• What went wrong? If it was a bad day or poor timing, a resit may mostly need practice on the clock. If whole topics were never understood, it needs more time.
• What else is happening? Resit preparation competes with new courses and other exams. Be honest about the hours available.
• Does the student want to? A resit goes more smoothly when the student has chosen it and has a say in the plan.

Sometimes the right answer is not to resit, and to put the effort into the next stage instead. That is a reasonable decision, not a failure.

A result gives you a grade, not a list of lost marks, so you have to rebuild the picture. Use what you have: mock papers, school tests, and a recent past paper for the same code, sat now on the real clock. That paper is a clearer starting point than memories of the exam day.

Then sort every lost mark into one of three kinds:

• Did not know it. Whole topics missing or guessed. The fix is to relearn the topic, then drill questions on it from many years of papers.
• Knew it, but did not write what the mark scheme wants. Vague answers, missing units, skipped steps in working. The fix is to mark every practice answer point by point against the official mark scheme, which lists the exact points that earn marks.
• Ran out of time. Unanswered or rushed final questions. The fix is whole papers on the real time limit, and practice at moving on from a question that is taking too long.

Before you plan the revision, confirm the practical details with your school, the British Council or your exam centre. They set these, and they change, so do not rely on last year's dates or on a course website. Ask:

• which sittings are offered for this subject and code, and where;
• the entry deadline, and what happens if you miss it;
• the exam fee;
• for a student who has left school, whether they can enter as a private candidate, and how;
• for a science subject, which practical paper the student would sit;
• whether every paper is sat again, or whether anything can be carried forward.

Write each answer down with the date you were told and who told you.

A common mistake is to repeat the first preparation, only more of it. Whatever that preparation was, it produced the first result. Change the part that did not work.

• If knowledge was the problem, go back through the weak topics properly, in syllabus order, before touching whole papers.
• If answers were vague, spend less time reading and more time writing answers and marking them against the scheme. Our guide to command words shows what describe, explain and suggest each ask for.
• If time was the problem, sit whole papers on the real time limit from early on, not only in the final weeks.
• In every case, keep a list of every question you get wrong, and clear it before you sit the next paper.

The method in our guide on how to practise past papers works as well for a resit as for a first attempt. Someone resitting has one advantage: they have already sat the real exam and know how it felt. Use that to aim practice at the part that went wrong.

Prepare for the exact syllabus code you will sit again. The code decides the content, the papers and the mark schemes.

• Cambridge O Level and Edexcel International GCSE are different qualifications, even in the same subject. Switching to another board or code means a different syllabus and different papers, so treat it as a new course, not a resit.
• Some codes look alike. Edexcel's modular International GCSE Chemistry (4XCH1), for example, is a different qualification from International GCSE Chemistry (4CH1), with different papers.
• Syllabuses are revised from time to time. In Cambridge O Level Physics (5054), for example, papers before 2023 were set on an earlier version of the syllabus. Check which version applies to your sitting, and lean your practice towards recent papers.

The code is printed on the statement of entry. If in doubt, ask the school or exam centre before you buy any course or book.

If you used Eudika Learn before and your access ended in the past 12 months, any future sitting is 30% off, in any subject. Use the same account as before. The details are in the retaker question on the home page.

Courses are sold for one exam sitting, and access lasts until one month after the last paper of that sitting, so buy for the sitting you are entered for.

The practice tools match the three kinds of lost mark: topic drills across many years of past papers, written answers checked against the official mark scheme, and timed papers that hand in when the clock reaches zero. A free account gives three practice attempts in each subject, so you can sit one recent paper and see where you stand before deciding anything.