The decision arrives in an awkward window. Grades land, enrolment is days away, and a choice that shapes the next two years, and quietly influences what comes after, has to be made while everyone is still catching their breath.
The question that dominates the conversation is usually about difficulty. Which A-Levels are the hardest? It is worth answering properly, because the honest answer is more useful than the ranked list most people expect.
Sciences, maths and modern foreign languages are generally regarded as the most demanding, and there is real evidence behind that reputation rather than just staffroom folklore.
Ofqual spent several years investigating exactly this question. Statistical analysis does suggest that A-Level physics, chemistry, biology, French, German and Spanish are more "statistically difficult" than other subjects, meaning a student of a given ability tends to score lower in them than in subjects elsewhere on the timetable. Earlier research from Durham University put the gap as high as a grade in some cases.
What Ofqual did with that finding matters just as much. In 2018 it published a decision not to adjust grading standards in those subjects. Its reasoning was that statistical difficulty alone cannot prove a subject is marked more harshly, the numbers are also shaped by who takes the subject, how much teaching time it gets, the nature of the skills involved, and how motivated the cohort is. The regulator did commit to preventing these subjects from becoming more severely graded over time.
Two practical conclusions follow. The reputation is not imaginary, so a student taking three sciences should expect to work harder for the same grades than a peer on a lighter combination. But "hardest" is not a fixed league table, and treating it as one leads to bad decisions.
Difficulty is only half the equation. The other half is fit, and it is the half that actually predicts results.
A student who finds essays natural will produce better work in history than in chemistry, whatever the national statistics say about relative severity. A student who enjoys problem-solving will find maths less punishing than someone who chose it because it sounded impressive. The subject that is hardest in the abstract is not necessarily the hardest for your child.
The most reliable predictor is simple: how did they find the subject at GCSE, and did they enjoy any of it? Two years is a long time to spend on something chosen for its reputation.
Some degrees have non-negotiable subject requirements, and missing one closes the door before the application is written. This is the part of the decision that genuinely cannot be undone later.
Plenty of degrees ask for nothing specific. Law is the example that surprises families most, Oxford, like most law faculties, sets no required subject, and there is no such thing as an A-Level in law being expected. English literature, history and psychology are similarly open, though strong essay-writing subjects help.
The Russell Group's Informed Choices website is the best free tool for checking this. It lets you enter a degree and see which subjects are essential, useful, or simply worth considering, and it works in reverse, showing what a given combination keeps open.
A good deal of subject-choice guidance still tells students to take at least two "facilitating subjects" to keep options open. That advice is retired.
The Russell Group published its facilitating subjects list for years, then withdrew it in 2019. Its own explanation was that the list had been widely misread as meaning these were the only subjects worth taking for a competitive university, which was never the intention. It was replaced with the Informed Choices website precisely because a single list could not reflect how varied degree requirements actually are.
So if a well-meaning relative insists your child needs two subjects from a specific list, the honest answer is that the organisation behind that list stopped publishing it years ago. Check the requirements for the courses they are actually interested in instead.
Sixth forms usually ask for a grade 6 or 7 in a subject before allowing a student to take it at A-Level. That threshold is not arbitrary gatekeeping.
The step up from GCSE to A-Level is steeper than most students expect, particularly in maths and the sciences, where the pace roughly doubles and the assessment rewards depth rather than coverage. A student who scraped a 5 in GCSE maths will usually find A-Level maths punishing, not because they lack ability but because the foundations are not yet secure enough to build on quickly.
If a grade came in below the requirement for a subject your child had set their heart on, speak to the sixth form before assuming the door is shut, there is often more flexibility than the prospectus suggests, especially where the shortfall is narrow. Our guide to what GCSE grades mean explains how the thresholds work and what schools are really looking for.
Three is the standard, and three is what universities base their offers on. Very few courses require a fourth, and the ones that do tend to say so plainly.
A fourth subject makes sense for a student who is genuinely comfortable across all four and wants the extra breadth, further maths alongside maths is the most common example, and it is close to expected for some maths and physics degrees. It rarely makes sense as a way of looking more impressive. Three strong grades beat four adequate ones in every admissions conversation, and the fourth subject usually costs marks in the other three.
The Extended Project Qualification is worth considering as an alternative to a fourth A-Level. It carries UCAS points, some universities reduce their offer for a strong one, and it teaches independent research in a way that suits students heading for essay-based degrees.
Psychology, economics, politics, sociology and law all attract large numbers of students who have never studied them before, and no GCSE is required for any of them.
These can be excellent choices. They are also the subjects where students most often misjudge what the course involves. Psychology is far more statistical than most expect. Economics is heavier on maths. Politics involves a great deal of writing. Before committing, it is worth ten minutes on the exam board specification, reading what is actually assessed prevents a good deal of regret in October.
A combination should do two things: keep the intended route open, and hold together as a workload.
Three essay subjects means a permanent writing load, which suits some students and overwhelms others. Three sciences plus maths is intense but coherent, since the content reinforces itself. Mixed combinations, a science, an essay subject and something else, keep more doors open and suit students who genuinely do not know yet.
The trap worth naming is narrowing too early. A fifteen-year-old certain about a career at the end of Year 11 may feel differently by Year 13, and a combination built entirely around one destination can be hard to redirect. Where a student is undecided, breadth is not indecision, it is sensible insurance.
Sometimes grades come in below what a chosen subject requires, and the original combination is no longer available.
This is more common than it feels in the moment, and it is rarely a disaster. Options usually include a different but related subject, a BTEC or applied route in the same field, taking the subject at a different sixth form with lower entry requirements, or, where a specific grade is essential for a specific degree, resitting.
Whatever the direction, make the decision with the school rather than in the car park. Heads of sixth form spend that week doing exactly this and have seen every version of it. If a resit is the route, our guide to GCSE resits covers the timings and what the months in between should look like.
If your child is stepping up to a demanding combination and wants to start the year on the front foot, or a subject already feels harder than expected, that transition is where focused one-to-one support does the most good. Get in touch if it would help to talk it through.
Sciences, maths and modern foreign languages are generally the most demanding, and Ofqual research found they are statistically more difficult than other subjects. Ofqual decided in 2018 not to adjust their grading, noting that statistical difficulty alone does not prove harsher marking. Which subject is hardest in practice depends heavily on the individual student.
Some degrees require specific subjects, chemistry for medicine, maths and physics for engineering, maths for most competitive economics courses. Beyond those requirements, universities do not rank subjects generally. The Russell Group withdrew its facilitating subjects list in 2019 and replaced it with the Informed Choices website.
No specific subjects are required. Oxford, like most law faculties, sets no compulsory A-Level for law, and an A-Level in law itself is not expected. Subjects that build strong reading, analysis and essay-writing are useful preparation, but the entry requirement is about grades rather than a particular combination.
Three is standard and is what universities base offers on. A fourth is worth taking only if a student is comfortable across all four, or where further maths is expected for their intended degree. Three strong grades are better than four average ones.
Yes, for subjects not usually taught at GCSE, psychology, economics, politics, sociology and law among them. Where a GCSE exists, sixth forms typically ask for a grade 6 or 7 in that subject, because the step up to A-Level is steep.
Speak to the sixth form first, as there is often flexibility where the shortfall is small. Alternatives include a related subject, an applied or BTEC route, a different sixth form with lower entry requirements, or resitting where a specific grade is essential for a specific degree.
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