IB Maths AA or AI: how to choose, and what each course really demands

Every IB Diploma student takes exactly one maths course. The choice is usually made in a hurry in Year 11 or Grade 10, and it decides which university courses stay open two years later.

The short answer to IB Maths AA vs AI is this. Analysis and Approaches is the course for students heading towards engineering, mathematics, physics, computer science or economics at selective universities, and for them it usually needs to be at higher level. Applications and Interpretation is a serious, statistics-heavy course that suits a much wider group of degrees. The mistake is not choosing AI. The mistake is choosing AI, or AA at standard level, without first checking what the target courses ask for.

The four options, and the one rule

The IB offers four maths courses: Mathematics: analysis and approaches at SL and HL, and Mathematics: applications and interpretation at SL and HL. The IB mathematics page is explicit that a student can only study one of them as part of the Diploma.

Both are genuine pre-university maths, and both include functions, calculus and statistics. According to the IB subject briefs, the two courses share 60 hours of common content at SL, and the recommended teaching time is 150 hours at SL and 240 hours at HL. The difference is emphasis, not seriousness.

Analysis and Approaches (AA) is built around algebra, functions and calculus. The IB describes it as having a strong emphasis on constructing, communicating and justifying mathematical arguments. It is the closer relative of A Level Mathematics.

Applications and Interpretation (AI) is built around modelling and statistics, with heavy use of technology. The IB describes it as focusing on the meaning of mathematics in context. It still contains calculus, but less of it, and far more data work.

Where the teaching hours actually go

The clearest way to see the difference is the recommended teaching hours in the IB's own subject briefs for the current courses.

Read the calculus and statistics rows together. AA HL gives calculus 55 hours and statistics 33. AI HL almost reverses that, with 52 hours of statistics and 41 of calculus. AI's functions time also goes mostly on modelling real data, not algebraic manipulation.

That table explains most university preferences. Engineering and physics degrees start with calculus, algebra and proof. Psychology, biology and business degrees start with data and statistics.

How IB Maths Analysis and Approaches and Applications and Interpretation are assessed

The assessment structures look similar on paper. The detail that matters most is the calculator.

Source: the IB's current subject briefs for both mathematics courses.

The non-calculator paper is the real dividing line. In AA, 40 per cent of the SL grade and 30 per cent of the HL grade come from a paper where every simplification, derivative and equation is done by hand. In AI, every written paper allows the graphic display calculator. A student who is accurate with algebra under time pressure has a real advantage in AA. A student who understands ideas but slips in long manipulations will usually find AI kinder.

That does not make AI easy. Its papers are long and contextual: students choose a model, run it on the calculator and explain the answer in words.

Paper 3 is only for HL. Two long problem-solving questions lead the student through an unfamiliar idea. It rewards stamina and careful reasoning.

The exploration: the 20 per cent that is in your hands

Both courses, at both levels, include the mathematical exploration. It is internally assessed, worth 20 per cent of the final grade, and the IB recommends around 15 hours of class time for it. The student chooses a topic, poses a question and works through it mathematically.

It is the component a student controls most. A few practical points from our teaching:

• Choose a question the student can answer with mathematics at their level. A beautiful topic that needs university maths produces a weak exploration.
• Play to the course. AA explorations often work best on calculus, proof or geometry; AI explorations on real data and modelling.
• Start early. The exploration usually lands in the same months as the Extended Essay and other internal assessments (our guide to the IB core maps that workload), and a rushed one shows.
• Use technology to check and to model, but make sure the student can explain every step in their own words. It is assessed as the student's own work.

Both courses are changing: who is affected

The IB is revising both maths courses. Its mathematics page states that the final assessment of the current courses is November 2028 and that a new curriculum will be taught from 2027. The Analysis and Approaches update page gives first teaching in August 2027 and first assessment in May 2029.

A student starting the Diploma in August 2027 will almost certainly take the new version. The IB describes it as refinement, not reinvention: content has been removed, none added.

• AA drops financial applications and bivariate data at both levels, and at HL also proof by counterexample and Euler's method.
• AI drops logarithms and the trapezoidal rule at SL, and at HL drops complex numbers, the vector product, the Poisson distribution and some hypothesis tests.
• Paper mark totals fall slightly (Papers 1 and 2 drop to 75 marks at SL and 100 at HL), and HL Paper 3 is set at one hour.
• The exploration stays, with the same criteria at SL and HL: problem specification, abstraction, computation and interpretation.

With complex numbers and the vector product leaving AI HL, the gap between the two HL courses for physics and engineering is widening, not closing.

What universities actually ask for

This is where the decision is really made. Read the specific course page for the specific year of entry, not general advice. These examples, checked in September 2026 for the current entry cycle, show how much the answer varies. Requirements can change for later years.

• Cambridge. The Engineering course page says it asks IB students for Analysis and Approaches, with Mathematics and Physics at higher level. The Economics and Computer Science pages carry the same line about Analysis and Approaches and require Mathematics at higher level.
• LSE. The BSc Economics and Data Science page asks for 766 at higher level with a 7 in "Mathematics: analysis and approaches".
• Edinburgh. The Mathematics BSc requires Mathematics at higher level, grade 7, and specifies "Analysis and approaches only". By contrast, Biological Sciences accepts either maths course, or Physics, at SL grade 6 for standard entry.
• Imperial. The Computing BEng page accepts either Analysis and Approaches or Applications and Interpretation at higher level, with a 7 required in Mathematics. Imperial's Mathematics BSc page also accepts either at HL but states that Analysis and Approaches is preferred.

Two lessons follow. For maths-heavy courses at the most selective UK universities, AA HL is the safe answer and sometimes the only one. And the rules are not uniform even within one subject: Cambridge Computer Science asks for AA, while Imperial Computing accepts AI HL.

IB Maths AA vs AI: a decision table by intended degree

Use this as a starting point, then confirm every line against the actual course pages on your shortlist.

A note on HL for its own sake. HL maths is 240 recommended hours against 150 at SL, and it takes one of a student's three or four higher level slots. If no course on the shortlist needs HL maths, a strong grade at SL plus a third HL subject the student is good at is often the better Diploma strategy. Our guide to choosing Grade 11 subjects sets out how to work backwards from the degree.

Who each course really suits

Beyond university requirements, fit matters.

AA tends to suit a student who is accurate with algebra without a calculator, enjoys why a method works, did well in IGCSE Additional Maths or a higher-tier GCSE with room to spare, and can hold a long chain of reasoning.

AI tends to suit a student who understands ideas but makes small algebraic slips under pressure, is comfortable with data, graphs and written interpretation, and is heading towards a degree that uses statistics more than calculus.

If a student fits AI by temperament but has an engineering or economics target, the honest answer is usually AA with support. Temperament can be worked on over two years. A missing subject requirement cannot be fixed after results day.

A five-step check before the options form goes in

1. Write down three to five real university courses the student might apply to, in the countries you are considering.
2. Open each course page and note the exact maths wording: course name, level and grade.
3. If every course accepts AI, or asks only for SL, choose on fit and on the rest of the Diploma timetable.
4. If any course names AA or HL, take that seriously. In our experience it is usually easier to drop from HL to SL, or from AA to AI, early in Year 12 than to move the other way, though each school sets its own rules.
5. Ask the school which combinations run in the timetable, and what its policy is on changing maths course or level after the start of the programme.

If the student has no idea yet what they might study, spend an hour on direction before locking in subjects. PRISM career mapping is one structured way to turn a vague "something with science" into a shortlist you can check. If the family is still deciding on the programme itself, start with IB Diploma or A Levels.

Frequently asked questions

Is IB Maths AI easier than AA?

AI is not easier, but it is different. AA includes a non-calculator paper and more algebra and calculus, while AI allows the calculator on every paper and puts more weight on statistics, modelling and written interpretation.

Do I need IB Maths AA HL for engineering?

For selective UK engineering courses, usually yes. Cambridge Engineering, for example, asks IB students for Analysis and Approaches with Mathematics and Physics at higher level. Always check the course page for each university you apply to.

Can I study computer science with IB Maths AI HL?

At some universities, yes. Imperial's Computing BEng accepts either maths course at higher level, while Cambridge Computer Science asks for Analysis and Approaches. Check every course on your shortlist before choosing.

Is IB Maths SL enough for economics?

For many economics courses it is not. Leading courses often require HL maths, and some, such as LSE's Economics and Data Science, name Analysis and Approaches with a grade 7. Some other economics degrees accept SL maths, so the course page is the only reliable guide.

Can I switch from IB Maths AA to AI during the Diploma?

Many schools allow a change early in the programme, but each sets its own policy. Moving from AA to AI, or HL to SL, is generally more practical than the reverse, which means catching up on missed content.

What is the IB maths exploration?

The exploration is an internally assessed piece of independent mathematical work, worth 20 per cent of the final grade in both courses at both levels. The student chooses a topic, poses a question and investigates it with mathematics from their course.

When does the new IB maths syllabus start?

The IB states that the new maths curriculum will be taught from 2027, with first assessment in 2029; for Analysis and Approaches it gives first teaching in August 2027 and first assessment in May 2029. The final assessment of the current courses is November 2028.

Career Launcher UAE tutors both IB maths courses at SL and HL through our IBDP programme, working from the IB's own specifications, past papers and mark schemes, including support with the exploration. If the harder question is which course and level a student needs for their university plans, our university guidance sessions check the actual course requirements before the options form goes in.

Related reading: IB Diploma or A Levels: choosing the right sixth form route in Dubai, Choosing Grade 11 subjects around the degree you want and Predicted grades: how schools set them and how universities use them.