The IB curriculum explained: a complete parent's guide

The 60 second summary

The International Baccalaureate (IB) is a non profit educational framework headquartered in Geneva. It runs four programmes: the Primary Years Programme (PYP) for ages three to twelve, the Middle Years Programme (MYP) for ages eleven to sixteen, the Diploma Programme (DP) for ages sixteen to nineteen, and the Career related Programme (CP) as a vocational alternative at sixth form. The programmes share a common educational philosophy emphasising international mindedness, inquiry led learning and the development of conceptual understanding rather than the memorisation of facts. The Diploma is the senior school qualification and the one most parents care about: it is recognised at every Russell Group, Ivy League and Group of Eight university and at the leading institutions across continental Europe, the Middle East, India, East Asia and Latin America.

The IB sits in the same global pre university tier as A Levels (the British qualification) and the American high school diploma combined with Advanced Placement courses. The choice between them is not a quality choice (all three serve top universities well) but a fit choice driven by the child's learning style, the family's likely next move, and the strength of the specific schools available to you. The IB rewards breadth and synthesis. A Levels reward depth in a narrow set of subjects. The American track rewards flexibility and the management of a broad transcript over four years. The IB curriculum hub covers programme structure in more administrative detail.

A short history of the IB

The IB was founded in 1968 at the International School of Geneva to serve the children of internationally mobile diplomats and United Nations staff who needed a single recognised qualification regardless of their next posting. The Diploma Programme launched first in 1969 with seven schools and 29 students. Over the following decades the programme spread across the international school network, into the British and American international school markets, and from the 1980s onwards into the state school systems of many countries (notably Canada, Australia, the United States and several European states).

The IB now serves over 2 million pupils across 5,700 schools. Roughly 60 per cent of IB schools are state funded; the rest are private or international. The IB has retained its non profit governance and its Geneva headquarters, with regional offices in Bethesda (Americas), The Hague (Europe and Middle East) and Singapore (Asia Pacific). It is the only curriculum in the world genuinely built for the mobile family, and that origin shapes its design in ways that matter for parents: it is portable across schools and countries by design, it is designed to be taught in any of three languages (English, French and Spanish), and it is designed to be recognised without translation by universities across the major higher education systems.

The Primary Years Programme

The Primary Years Programme covers ages three to twelve and is the IB's foundation stage. It is not a syllabus in the traditional sense: it specifies a transdisciplinary framework, six themes that recur each year (Who we are, Where we are in place and time, How we express ourselves, How the world works, How we organise ourselves, Sharing the planet), and a set of skills and attitudes. Schools build their own units of inquiry around these themes, using the local context, the children's interests and the available expertise.

What this looks like in a classroom: children spend several weeks investigating a question (How do communities organise themselves? How does light travel? Why do people migrate?) across multiple subjects at once. Mathematics, language, science, social studies, the arts and physical education weave into the inquiry rather than sitting as separate timetabled blocks. The teacher sets the question and the resources; the children do much of the discovery work themselves. At the end of each unit, children present what they have learned to peers, parents and the wider school community. The final year of PYP culminates in the Exhibition, a substantial independent inquiry the children plan and execute together.

PYP schools tend to feel different from traditional primary schools. The classrooms are organised around inquiry stations, the wall displays show children's thinking rather than finished answers, and there is more student talk than teacher talk in any given lesson. The trade off is that PYP requires teachers who can plan and run open ended inquiry well, which is a substantial training investment, and the quality of PYP at any given school depends heavily on the strength of the leadership and the stability of the teaching team. Look for IB authorisation as the baseline credential; ask about teacher tenure and PYP coordinator experience before you accept the offer.

The Middle Years Programme

The Middle Years Programme covers ages eleven to sixteen and is the IB's lower secondary framework. Like PYP, it is more philosophy than syllabus: it specifies eight subject groups (Language and Literature, Language Acquisition, Individuals and Societies, Sciences, Mathematics, Arts, Physical and Health Education, Design), a set of approaches to teaching and approaches to learning, and a set of global contexts that frame each subject.

The MYP is the most contested of the IB programmes. Critics argue that the framework gives schools too much latitude and that academic rigour is uneven across MYP schools, particularly in mathematics and science. Defenders point out that the framework is deliberately designed to integrate with strong local curricula (the Cambridge Lower Secondary in international schools, the New South Wales or Ontario state syllabi in state schools, the Swiss cantonal curricula in Swiss schools) rather than replace them. In practice the strongest MYP schools combine the IB framework with a robust externally referenced syllabus in mathematics and the sciences, and the result is genuinely good. The weaker MYP schools use the framework as a substitute for an academic syllabus, and the result can be thin.

The MYP culminates in either the Personal Project (a self directed final year project worth 25 per cent of the final assessment) or the e Assessment system introduced by the IB from 2016 onwards, which offers externally moderated examinations in selected subjects. Schools choose whether to take the e Assessment. Parents comparing MYP schools should ask whether the school takes the e Assessment, what proportion of pupils sit it, and how the school benchmarks MYP outcomes against external standards. The MYP versus Cambridge Lower Secondary piece covers the comparison in more detail.

The Diploma Programme

The Diploma Programme is the senior school qualification and the most important of the four programmes for university entry. It runs from ages sixteen to nineteen over two years and produces a single integrated diploma scored out of 45 points. The structure is rigid by design: every Diploma student studies six subjects, one from each of six groups, plus three core requirements.

The six subject groups are: Group 1 Studies in Language and Literature (the student's strongest language), Group 2 Language Acquisition (a foreign language), Group 3 Individuals and Societies (history, geography, economics, psychology and similar), Group 4 Sciences (biology, chemistry, physics, computer science, environmental systems and societies, design technology, sports science), Group 5 Mathematics (in two versions, Analysis and Approaches or Applications and Interpretation), Group 6 Arts (or a second choice from Groups 2 to 4). Three of the six subjects are taken at Higher Level (240 hours over two years) and three at Standard Level (150 hours). The Higher Level subjects are typically the ones the student plans to study at university and provide the depth that universities care about.

The three core requirements are Theory of Knowledge (a 100 hour critical thinking course assessed through a 1,600 word essay and a 10 minute exhibition), the Extended Essay (a 4,000 word independent research essay on a topic of the student's choosing within one of their six subjects), and the Creativity, Activity, Service (CAS) portfolio (a 150 hour record of co curricular activities across the three strands). Theory of Knowledge and the Extended Essay together earn up to 3 of the 45 final points; CAS is pass or fail. The combination of six subjects plus the core is what gives the Diploma its distinctive shape, and the Extended Essay in particular is widely cited by university admissions tutors as the single best preparation for the demands of a degree level dissertation. See the AP Capstone versus IB Extended Essay piece for the detailed comparison.

The Career related Programme

The Career related Programme (CP) launched in 2012 as the IB's vocational alternative to the academic Diploma. It is built around at least two Diploma subjects (typically at Standard Level), a career related study (a BTEC, an industry vocational qualification, or a school designed equivalent), a Reflective Project (a 3,000 word piece of research on an ethical issue arising from the career field), a Personal and Professional Skills course, a Service Learning portfolio, and a Language Development element.

The CP is delivered in a comparatively small number of schools (around 350 globally as of 2026, mostly in the UK, the US, Australia and the Nordic states) and is designed for pupils whose post school destination is a vocational pathway or an applied degree at a teaching focused university. It is well respected within those contexts but is not yet established as a primary route into the most selective universities. Parents shortlisting on the basis of selective university entry should focus on the Diploma rather than the CP.

How the IB is scored

The Diploma is scored out of 45 points. Each of the six subjects is scored 1 to 7, with 7 being the highest grade. Six subjects therefore contribute up to 42 points. Theory of Knowledge and the Extended Essay are scored together on a 1 to 3 matrix that adds up to 3 bonus points. The total ranges from 24 (the pass mark, with additional conditions) to 45. The historical global average sits at around 30 to 31 points; strong international schools post averages of 34 to 38; the top tier (around 50 schools globally) posts averages of 38 or higher.

For context, a score of 38 points roughly corresponds to AAA at A Level or a 4.0 weighted American GPA with multiple AP fives. A 42 plus score corresponds to A*A*A* at A Level or a near perfect AP transcript. The full range matters: a 30 point Diploma is a respectable qualification that opens many universities; a 42 plus Diploma is genuinely elite. A score below 28 is rare among strong schools and indicates either a mismatched programme choice or a student who would have been better served by a more depth focused pathway.

How universities read the IB

UK universities read the IB Diploma cleanly and routinely make IB specific offers alongside A Level offers. Oxford and Cambridge offers typically run 38 to 42 points with specific Higher Level requirements (a 7 in mathematics for the STEM courses, 7 7 6 at Higher Level for many humanities courses). Imperial and LSE offers run 38 to 41 with subject specific Higher Level scores. The wider Russell Group typically offers 32 to 37 points. The IB Diploma is treated as fully equivalent to A Levels at every UK university; there is no penalty.

US universities convert the Diploma into their own admissions calculus. The Ivy League and top tier private universities typically expect 38 plus with strong Higher Level subjects (7s and 6s) and strong supporting credentials (SAT or ACT scores, supplementary essays, extracurricular profile, interviews). The major US public flagships (Berkeley, Michigan, UCLA, UNC Chapel Hill) typically expect 36 plus. US universities also award college credit for individual Higher Level subjects scored at 5 or above, which can reduce the cost and length of an American degree.

Continental European universities, particularly in the Netherlands, Germany, Sweden, Denmark, Norway and the Republic of Ireland, increasingly run English language degree programmes that are highly receptive to IB applicants. Dutch and Irish universities convert IB scores into national admissions points cleanly. Swiss universities recognise the Diploma alongside the Matura for direct entry. Australian and New Zealand universities convert via the Australian Tertiary Admission Rank (ATAR). For the head to head with AP based applications see IB versus AP university outcomes.

Workload and the real student experience

Honest description of the workload. The Diploma is hard work. Six subjects across two years, three at Higher Level, plus Theory of Knowledge, the Extended Essay and the CAS portfolio, add up to a substantial weekly load. Students at strong schools typically work twelve to twenty hours per week outside class through Years 11 and 12 (or Grades 11 and 12 in the US system), with peaks in the Year 12 mocks period (January) and the run up to the final examinations (May or November). The workload is broadly comparable to a strong A Level programme but more evenly spread because the six subjects are sat in parallel rather than narrowed to three or four.

The Extended Essay deserves a specific note. It is the single piece of work that most prepares students for university study because it requires independent research, sustained writing at length and the management of an academic supervisor relationship. Done well, it is the highlight of the two years. Done badly, it consumes hundreds of hours for minimal return. Strong IB schools structure the Extended Essay tightly with checkpoint deadlines, supervisor matching by subject and a clear topic approval process. Weak IB schools leave the Extended Essay to drift; the result is panic in March of Year 12 and a sub par finished essay.

Theory of Knowledge is the second distinctive element. Strong students engage with it genuinely and find that it sharpens the way they think about evidence, knowledge claims and the nature of academic disciplines. Less engaged students treat it as a hoop to jump through. The course is taught by a dedicated Theory of Knowledge teacher (usually a philosophy or English specialist) and assessed through a 1,600 word essay and a 10 minute oral presentation in the second year. The CAS portfolio is the easiest to do badly and the easiest to do well: schools that build CAS into the timetable get it done; schools that leave it to the students often see it stall.

Fees and the cost of an IB education

IB schools are not uniformly expensive but the international school IB tier is one of the more expensive curriculum choices globally. At sixth form level (the Diploma Programme), fees in the major international school markets cluster as follows: Singapore SGD 38,000 to SGD 55,000 (USD 28,000 to USD 41,000), Dubai AED 75,000 to AED 110,000 (USD 20,500 to USD 30,000), Hong Kong HKD 200,000 to HKD 280,000 (USD 25,500 to USD 35,800), London GBP 28,000 to GBP 42,000 (USD 35,500 to USD 53,500), Geneva CHF 38,000 to CHF 50,000 (USD 43,000 to USD 56,500), New York USD 55,000 to USD 70,000. Many cities offer the Diploma in less expensive Tier 2 schools at meaningfully lower price points; some Asian and European state schools offer the Diploma for free to residents.

The IB itself charges modest registration and examination fees. The school pays an annual programme fee to the IB (around USD 12,000 to USD 14,000 per programme per school per year), and a per pupil per subject examination fee for the final Diploma examinations (around USD 130 per subject in 2026, plus a per candidate registration fee of around USD 175). Most schools recover these as a separate IB exam line in Year 12 fees, typically USD 1,500 to USD 2,500 per pupil. The fees explorer models specific city by city combinations and the hidden fees piece covers the wider structural cost picture.

What the IB does well

The IB does several things genuinely well. The first is portability. A pupil who moves schools or countries mid programme transitions cleanly because the Diploma is a single global qualification with a stable syllabus across IB schools worldwide; A Level and AP students face more disruption when they move. The second is preparation for university study. The Extended Essay, Theory of Knowledge and the requirement to study a foreign language all build the academic skills that universities most value at admission: independent research, the analytical essay, the willingness to engage with ideas across disciplines.

The third is breadth. A Diploma student leaves school with a meaningful encounter in language, literature, history or economics, science, mathematics and the arts, regardless of their eventual university focus. This makes the IB graduate distinctive in university admissions and in early career hiring. The fourth is the international ethos. The CAS portfolio, the global context approach in MYP and the requirement to study a foreign language at sixth form all build a worldview that is genuinely useful to a child who will live and work across multiple countries.

Where the IB struggles

The IB has real weaknesses. The first is the workload and the inability to drop a weak subject. A student strong in humanities who is weak in mathematics or science still has to take both at Standard Level, and the points cost of a 3 or 4 in a weak subject can pull the overall Diploma score down even when the rest of the transcript is strong. A Level students drop weak subjects after the equivalent of Year 11 and concentrate on three subjects they are good at, which is a cleaner path for the specialist learner.

The second is the unevenness of MYP across schools. Without a strong externally referenced syllabus to anchor the framework, MYP can produce weak preparation for the Diploma in mathematics and the sciences, and the transition to Diploma Year 11 can be jarring. Strong IB schools manage this by running MYP alongside Cambridge IGCSE or another anchor; weaker schools rely on MYP alone and the Diploma results show it.

The third is fees. Outside the state IB school networks, the Diploma is delivered predominantly in higher fee international schools, and the cost gap between IB schools and the equivalent British curriculum schools can be meaningful in some cities. The fourth is the predicted grades culture, which the IB itself has acknowledged as a problem and is reforming. See IB predicted grades for detail.

IB compared with the alternatives

The IB Diploma sits at sixth form alongside three main alternatives. A Levels (the British qualification) concentrate on three subjects in depth, dispense with the core requirements (no Theory of Knowledge, no Extended Essay, no CAS) and produce three separate grades from A* to E. The American high school diploma with Advanced Placement courses produces a four year cumulative transcript, requires breadth across English, mathematics, sciences, history and a foreign language, and overlays AP courses as the depth and rigour signal. The Swiss Matura, the French Baccalaureat and the German Abitur are the major national alternatives in continental Europe.

For most globally mobile families the practical choice is between the IB Diploma and the British A Levels, or between the IB Diploma and the American high school diploma with AP. Our IB versus British curriculum piece covers the first of those choices in detail, and the IB versus American curriculum piece covers the second. The which curriculum is best for STEM piece covers the trade off for science and engineering bound applicants.

How to choose an IB school

The right IB school is the one where the cohort is large enough to support genuine choice across Higher Level subjects, the teachers are stable enough to run good Theory of Knowledge and Extended Essay supervision, and the academic culture supports the workload without driving children into burnout. Practical questions to ask on the school tour: how many Higher Level subjects do you offer (six is the absolute minimum for genuine choice, ten or more is comfortable); what is the Diploma cohort size (smaller than 25 risks thin Higher Level groups, above 80 starts to fragment); what is the average Diploma score over the last three years and what is the score distribution (not just the average); how do you support the Extended Essay (timeline, supervisor matching, draft review); what proportion of the cohort takes higher level mathematics (a useful signal of the school's science strength).

Avoid schools whose marketing emphasises the IB without showing outcomes. Look at the destination university list, not just the Diploma scores. Look at the proportion of Higher Level 6s and 7s in the science and mathematics subjects, which is the hardest signal to fake. Check the IB World Schools register on the IB's website to confirm authorisation across PYP, MYP and DP as the school claims. The how to choose an international school piece covers the systematic approach; the switching international schools piece covers what happens if you need to move mid programme.

Related guides

• IB versus British curriculum compared
• IB versus American curriculum compared
• AP Capstone versus IB Extended Essay

Frequently asked questions