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Why the sixth form decision is different
The earlier years of school admit considerable flexibility. A child can move between systems, switch curricula and adapt within a term. The sixth form is different. It is a two-year cycle with a fixed external assessment at the end. The curriculum chosen in September of Year 12 determines which universities the candidate can realistically apply to in October of Year 13. Mid-cycle changes usually mean restarting Year 12 elsewhere, with a year lost and the family carrying the cost.
The other reason sixth form is different: the student is nearly an adult. The choice is theirs, not the parents'. The parents' job is to provide the framing, the school options and the trade-off conversations. The decision itself, including whether to move country, board at a different school or stay where they are, sits more with the eighteen-year-old than at any previous moment in their schooling.
The four credible curriculum options
For an internationally mobile family the practical short list of sixth form qualifications is four. The IB Diploma, taught at over 3,000 schools worldwide at Diploma level. A Levels, taught at British-pattern international schools globally and at every UK independent and state sixth form. The American high school diploma with AP courses, taught at American-pattern international schools and at all US high schools. The French Baccalaureate, taught at French international schools (lycées) globally and at a small number of bilingual schools.
| Qualification | Length | Strongest fit |
|---|---|---|
| IB Diploma | Two years | Globally mobile families; broad academic interest |
| A Levels | Two years | UK, HK, SG and Commonwealth universities |
| US Diploma + AP | Two years | US universities, North America-based families |
| French Baccalaureate | Two years | French-system universities, francophone families |
The choice is rarely about which qualification is academically richer. All four are robust. The choice is about which qualification gives the best fit for the universities the student is likely to apply to and which qualification is best supported by the schools available in the city the family lives in. Our piece on A Levels versus the IB for UK universities covers the UK question; the AP versus IB extended writing piece covers the writing and research load.
The IB Diploma at international sixth form
The IB Diploma requires six subjects (three at higher level, three at standard level) drawn across six subject groups including a first language, a second language, an experimental science, mathematics, an individual or societies subject and a creative or arts subject (or a second from another group). Alongside the six subjects, candidates complete the Extended Essay (4,000 words), Theory of Knowledge (a course plus a presentation and essay) and a 150-hour Creativity, Activity, Service programme.
The IB Diploma is the most globally portable qualification. It is accepted at most major universities worldwide without conversion. UK universities typically convert IB scores to UCAS tariff (a score of 38 to 40 maps roughly to AAA at A Level). US universities consider the IB Diploma a strong indicator of academic preparation and many give advanced placement credit for higher-level scores of 6 or 7. Continental European universities, particularly in the Netherlands, Germany and Spain, often prefer the IB over national qualifications for international applicants.
Where the IB suits
The IB suits students with broad academic interests who do not want to specialise at sixteen. It suits internationally mobile families because it travels cleanly. It suits students applying to a mixed portfolio of universities across countries. It is harder for students with strong subject specialisation (a student who wants to study maths, further maths and physics at A Level may find the IB's breadth constraining).
A Levels at international sixth form
A Levels are typically studied in three or four subjects over two years, with final exams in May and June of Year 13. The candidate chooses their subjects at the start of Year 12 and goes deep, with each A Level subject covering roughly the first year of a UK university course in the same subject. The result is intense subject focus and strong preparation for UK-style specialised undergraduate degrees.
A Levels are exceptionally well recognised in the UK, Hong Kong, Singapore, Australia, New Zealand and most former British Commonwealth countries. US universities accept A Levels readily, with AAA typically considered equivalent to a strong AP profile. Universities in the Netherlands, Germany and Ireland accept A Levels without conversion. Some continental European universities require a fourth A Level or a wider subject mix; this is checkable on a university-by-university basis.
The trade-off versus the IB is specialisation. A Levels reward students who know which subjects they enjoy and can commit to three or four for two years. They penalise students who want to keep all options open. The companion piece on A Level subject combinations for top universities covers the strategic subject-choice question.
Talk to us before you pick the school
Sixth form choice often reshapes the school search. A family open to either IB or A Levels has a broader school set than a family committed to one. Our editorial desk takes confidential enquiries; the school finder filters by curriculum and year-group availability, and the curriculum guides cover the academic detail of each.
The American diploma with AP
The American high school diploma is the qualification awarded by US high schools and by American-pattern international schools globally. The diploma is satisfied by completing a prescribed mix of subjects across four years of high school (Grades 9 to 12), with elective courses in Grades 11 and 12. The Advanced Placement (AP) programme overlays the diploma with university-level courses in specific subjects, with externally marked exams that can earn university credit.
AP courses are taken individually rather than as a fixed programme. Strong American-pattern sixth forms typically offer 15 to 25 AP courses; students take four to seven AP courses across Grades 11 and 12 alongside their regular high school course load. The AP Capstone diploma (Seminar and Research) adds a research and extended writing component that is comparable to the IB's Extended Essay in scope.
The American diploma plus AP is the natural choice for students applying primarily to US universities, particularly to the most selective US universities, which expect a competitive AP profile from strong candidates. It is also a workable option for students applying to Canadian universities. UK universities consider the diploma alongside AP scores; AP scores of 4 or 5 in three or more subjects typically satisfy A Level equivalence for most UK university courses.
The French Baccalaureate
The French Baccalaureate (le bac) is taken at French international schools (lycées) globally and at all French national schools. It is structured around a core of compulsory subjects (philosophy, languages, history) and a set of specialty subjects (specialités) chosen by the candidate. Final exams take place in May and June of the terminale year, the equivalent of Year 13.
The French Baccalaureate is the natural choice for francophone families and for students applying to French universities, including the grandes écoles. It is recognised at UK and US universities but requires the candidate to navigate the conversion process. The qualification is geographically narrow at international level; the network of French international schools is smaller than the IB or A Level networks, and a family planning multiple international moves should check that each likely posting city has a lycée offering the appropriate specialty subjects.
Sixth form fees: day and boarding
| Setting | Annual fees (USD equivalent) | Notes |
|---|---|---|
| UK independent sixth form, day | 22,000 to 32,000 | London and south of England premium |
| UK independent sixth form, boarding | 55,000 to 75,000 | Sixth-form-only colleges at lower end |
| US private boarding sixth form (Grades 11 to 12) | 75,000 to 92,000 | Top-tier; mid-tier 62,000 to 78,000 |
| Swiss international sixth form, boarding | 85,000 to 130,000 | Premium end of global market |
| International school in Asia or Middle East, day | 22,000 to 38,000 | Singapore and Hong Kong at higher end |
| European international school, day | 20,000 to 34,000 | Paris, Amsterdam, Berlin, Geneva |
The fee schedule above is the visible cost. As with earlier school years, the all-in cost is typically 15 to 25 per cent higher once registration fees, capital levies, school trips, exam fees, kit and extras are added. For boarding sixth form, the cost picture also includes guardian fees, flights and holiday accommodation; the companion piece on UK boarding from Asia and the cost calculator cover the modelling. For families considering sixth form at a UK boarding school for the first time, the related piece on the right age to start boarding includes the sixth-form entry case.
Sixth form decision checklist
- University destination shortlist by end of Year 11
- Curriculum chosen based on university fit, not perceived prestige
- Subject combination tested against target university requirements
- School options confirmed for chosen curriculum in current city
- Boarding option assessed where day school is not viable
- Costs modelled for two-year cycle including extras
- Student-led decision with parental framing, not vice versa
- Plan B in place if the chosen sixth form does not work after Year 12
FAQ
The International Baccalaureate Diploma is the most broadly recognised, taught at over 5,500 schools worldwide and accepted at most universities without conversion. A Levels are very strongly recognised in the UK, Hong Kong, Singapore and former British territories. AP credit is best recognised in the United States.
The IB Diploma covers a broader subject mix and requires the Extended Essay, Theory of Knowledge and a Creativity, Activity, Service programme. A Levels go deeper in three or four chosen subjects. Strong students succeed in both. The IB suits broad academic interests; A Levels suit students with clear subject focus.
It is possible but usually costly. Most students who switch between IB and A Levels mid-cycle restart from Year 12, losing a year. The cleaner path is to choose carefully at the start of Year 12 and to stick to that choice through to final exams in May or June of Year 13.
Most universities treat the major sixth form qualifications as equivalent on paper, but admissions officers in practice know how to read each. The strongest signal is consistency: a candidate who has chosen the right curriculum for their interests and performed strongly within it presents better than one who has cherry-picked.