The honest map is: subjects assessed entirely by written exam are generally straightforward for a private candidate; subjects with a meaningful non-exam assessment (NEA) component — coursework, controlled assessment, speaking, practical endorsement — range from difficult to effectively impossible without a school. The subject's academic difficulty has almost nothing to do with it. What follows is a practical guide to where different subjects sit on that spectrum, and why — but the golden rule is to check the actual specification for the board and year your child will sit, because the details genuinely vary and change.
Why NEA is the deciding factor, not the subject itself
As covered in more detail elsewhere in this cluster, non-exam assessment generally needs a centre to supervise, authenticate and mark it — something a private candidate typically doesn't have access to in the same way an enrolled student does. So the real question for any subject isn't "is this subject hard" but "how much of the final grade depends on something other than a written exam paper, and can that piece realistically be arranged?"
That reframes the whole exercise. A subject with a reputation for being academically demanding, like Further Maths, can be entirely straightforward to sit privately if it's 100% exam-assessed. A subject that sounds gentle, like GCSE Art and Design, can be genuinely difficult, because it's assessed almost entirely through a portfolio built and supervised over an extended period.
A practical map
This is a general guide based on how these subjects are typically structured — always confirm against the current specification for the specific board and year of entry, because assessment structures do change.
| Category | Typical subjects | Why |
|---|---|---|
| Usually straightforward | Maths, Further Maths, most humanities (History, Geography — though check for fieldwork/NEA elements), Religious Studies, many languages at written papers only | Assessed wholly or almost wholly by written exam; no ongoing supervision needed beyond the exam room itself |
| Possible but needs planning | English Language, English Literature, Geography with fieldwork elements | Mostly exam-assessed, but may include a smaller NEA or fieldwork component that needs arranging with a willing centre |
| Genuinely difficult | A-level Biology, Chemistry, Physics (for practical endorsement), GCSE Modern Foreign Languages (speaking assessment), GCSE Science (required practicals) | Exams themselves are sittable, but a real, separately-assessed practical or speaking component needs direct teacher supervision that's hard to arrange outside a school |
| Often effectively impossible without a school | Art and Design, Drama, Music (performance), Design and Technology, Food Preparation and Nutrition | Assessed mostly or entirely through NEA — portfolios, performances, made artefacts — that depends on sustained supervision, specialist facilities, or a live audience/examiner a private arrangement rarely replicates |
This isn't an exhaustive list, and where a subject falls can shift between exam board and even between specification updates, so treat it as a starting map, not a final answer for your child's exact situation.
A worked example: A-level Chemistry
Chemistry is a good illustration of why "is this subject sittable privately" is the wrong question — the right one is "which parts of it are." The written papers that make up the graded A-level are, in principle, sittable by a private candidate at a willing centre, in the same way as any other exam-only paper. What's separate, and reported separately, is the practical endorsement — a pass/not-classified judgement based on a set of practicals a teacher must directly observe over the course of the two years, feeding into a portfolio that only a centre can authenticate.
A private candidate can, in principle, still sit the graded exam papers and get a full A-level grade without the endorsement. But the endorsement doesn't vanish from the certificate — it's reported as "not classified" rather than simply absent, and some university courses and some competitive science-heavy courses do ask for it, or at least ask about it at interview. The practical, honest advice is: find out early, subject by subject and course by course, whether the universities your child is likely to apply to care about the endorsement for that specific course, and factor that into whether it's worth the extra effort of finding a centre that will supervise the practicals — rather than discovering the gap after results day. The same logic applies to Biology and Physics practical endorsement, and to GCSE combined and separate sciences, where required practicals feed into exam questions even though there's no separate pass/fail endorsement at GCSE level.
The mistake families make: assuming "written exam" and "easy" are the same thing
The table above sorts subjects by how much NEA they carry, not by how much content or preparation they need — and it's worth being explicit about that, because it's easy to read "usually straightforward" as "easy" and relax too soon. A subject with no coursework can still be a demanding, content-heavy A-level that needs a proper year or two of study; being sittable privately says nothing about how much work it takes to be ready for the exam itself. The opposite mistake also happens: a family sees a subject in the "genuinely difficult" row, assumes it's simply off the table, and doesn't even ask a centre — when in practice some centres do offer supervised practicals or speaking assessments for external candidates, and the only way to find out is to ask directly and early, ideally more than a year before the exam series, not in the months immediately before entries close.
Where IGCSEs change the picture
A significant number of home-educating families sidestep the NEA problem for GCSE-equivalent subjects by choosing IGCSEs instead — most commonly from Cambridge International or Pearson Edexcel International. Many IGCSE specifications were designed from the outset with international and independent candidates in mind, and as a result a good number have little or no non-exam assessment: the whole grade comes from written papers.
This is exactly why IGCSE comes up so often in private-candidate research — it isn't a loophole, it's a genuine structural difference in how some specifications are built. It's not universal, though: not every subject has an NEA-free IGCSE option, and some IGCSE subjects still carry practical or oral components (languages, sciences), so this needs checking subject by subject rather than assumed across the board.
What this map doesn't cover: vocational and applied qualifications
Everything above is about traditional linear GCSEs and A-levels. It deliberately doesn't map BTECs, applied general qualifications, or other vocational routes, which usually carry a different and often heavier internal-assessment structure than the academic subjects discussed here — frequently making them harder, not easier, to complete as a private candidate. If your child is considering one of these routes, treat this article as background only and ask the awarding body directly what proportion of the qualification is externally examined versus internally assessed before assuming it behaves like a GCSE or A-level equivalent.
What to do with this information
- List the specific subjects your child needs or wants, then check each specification individually for its actual assessment structure — the map above is a starting point, not a substitute for that check.
- For subjects with an NEA component, contact prospective centres early and ask directly whether they're able and willing to supervise it for a private candidate. This is the step that most changes the practical difficulty of a subject.
- Consider IGCSE alternatives where the subject content still fits your child's plans, particularly for sciences and languages where NEA is a known obstacle in the GCSE version.
- Don't assume a subject is impossible without checking — arrangements do exist for even the harder subjects at some centres, and equally don't assume an "easy" written-only subject stays that way if the specification updates.
The bottom line
The real question for any subject isn't how hard it is academically, but how much of the grade depends on something a centre has to supervise over time rather than mark from a paper sat in an exam hall. Written-exam-only subjects are generally the straightforward route; anything with real coursework, speaking, performance or practical endorsement needs a specific, centre-by-centre plan — and for some subjects, an honest look at whether that plan is realistic at all before you commit your child's time to it.