IB Diploma Mathematics is changing for first teaching in August 2027 and first assessment in May 2029. The International Baccalaureate has published updates for both Mathematics: Analysis and Approaches (AA) and Mathematics: Applications and Interpretation (AI). The new courses are refinements rather than complete replacements, but there are real changes to content, paper marks, Paper 3 timing at Higher Level, and the Internal Assessment criteria.
For students, parents and schools searching for IB Mathematics 2027 curriculum changes, the most important distinction is cohort timing. Students completing the current course through the final 2028 assessment should prepare for the current specification. Students beginning the new course from August 2027 will work toward first assessment in May 2029.
For tutors, this means version control matters. “IB Maths AA” or “IB Maths AI” is no longer enough information on its own. Ask which syllabus generation the student is taking, whether the course is SL or HL, and which assessment session applies before selecting notes, question banks, IA guidance or Paper 3 practice.
The transition timeline
| Date | What it means |
|---|---|
| 2026 | IB has published official update pages and subject briefs for the new AA and AI courses. |
| February 2027 | IB launches the new course documentation. |
| August 2027 | First teaching begins for the revised Mathematics courses. |
| November 2028 | Final assessment window for the current Mathematics courses. |
| May 2029 | First assessment for the revised AA and AI courses. |
The practical consequence is simple: from 2027 onward, resources need a visible syllabus date. A worksheet written for the current course may still be mathematically useful, but it should not be assumed to match the revised assessment model or content boundaries.
What stays stable
The overall identities of AA and AI remain recognisable. Analysis and Approaches continues to emphasise mathematical reasoning, algebraic and analytical thinking, functions and calculus. Applications and Interpretation continues to emphasise mathematical modelling, statistical thinking, practical contexts and technology-supported problem solving.
IB describes the redevelopment as refinement rather than reinvention. This matters because students do not need to discard the mathematical foundations of the present courses. Algebra, functions, calculus, probability, statistics, modelling and communication remain durable mathematical objects even when the official content list is adjusted.
AA: confirmed content changes for the new course
For Mathematics: Analysis and Approaches, IB states that content has been reduced and no new content has been added. The removals are targeted rather than wholesale.
AA Standard Level removals
- Financial applications
- Bivariate data
AA Higher Level removals
- Financial applications
- Proof by counter example
- Bivariate data
- Euler’s method
The important teaching implication is not to delete every old question containing these ideas from a library. Some may remain useful for mathematical enrichment. They simply should not be confused with required assessed content for the new syllabus.
AI: confirmed content changes for the new course
For Mathematics: Applications and Interpretation, IB again describes the revision as a reduction in content rather than the addition of a new mathematical strand.
AI Standard Level removals
- Logarithms
- Approximation of areas using the trapezoidal rule
AI Higher Level removals
- Complex numbers
- Vector product
- Poisson distribution
- Selected hypothesis tests involving a population mean and the correlation coefficient
These changes slightly narrow the assessed course, but the mathematical identity of AI remains modelling and statistical reasoning supported by technology. Students still need strong interpretation, function sense and the ability to connect a model back to a real-world context.
Assessment changes: fewer marks, same broad model
IB states that the external assessment model is broadly unchanged, but the total marks are reduced. At Standard Level, Papers 1 and 2 move to 75 marks instead of 80. At Higher Level, Papers 1 and 2 move to 100 marks instead of 110.
Higher Level Paper 3 also changes: the total marks fall to 50 from 55, and the paper duration becomes one hour instead of one hour and fifteen minutes. The consequence is not automatically “easier”. A shorter paper can still demand fast recognition and disciplined reasoning. Students should practise against the new timing once representative materials are available.
The Internal Assessment changes more meaningfully
The Internal Assessment remains the mathematical exploration, but IB states that Standard Level and Higher Level will use the same IA criteria. Those criteria are revised to reflect a mathematical inquiry process.
| Criterion | Marks | Main idea |
|---|---|---|
| A: Problem specification | 4 | Place the problem in context and state desired outcomes. |
| B: Abstraction | 6 | Identify assumptions, techniques, tools and mathematical form. |
| C: Computation | 4 | Carry out calculations and communicate Mathematics clearly. |
| D: Interpretation | 6 | Interpret results, evaluate outcomes and refine the work. |
This framework rewards a more explicit modelling and inquiry chain: specify the problem, abstract it into Mathematics, compute, then interpret and refine. Students should therefore avoid treating the IA as “pick a topic and do some calculations”. The reasoning from context to model and back again becomes central.
What the revised framework says about mathematical learning
IB’s new framework emphasises a mathematical inquiry process that includes specifying questions, choosing methods and tools, performing computation, and evaluating results for accuracy and relevance. It also highlights reasoning, communication, linking mathematical ideas and the dispositions of a successful learner.
That aligns with a robust way to teach Mathematics regardless of board: the student should know what problem is being solved, why a particular mathematical representation is appropriate, how the calculation works, and what the result means.
What current students should do
If the student is sitting the current IB Mathematics assessment before the revised course takes effect, do not prematurely switch to the new content list. Continue preparing for the current syllabus and current IA criteria. The existence of a future syllabus does not alter the requirements of the present examination.
What 2027 starters should do
- Confirm whether the student is taking AA or AI and at SL or HL.
- Use resources labelled for first assessment 2029 once the new course begins.
- Retain strong algebra, functions, calculus, probability and statistics foundations even where some assessed content has been removed.
- Train the inquiry sequence: problem → abstraction → computation → interpretation.
- Update IA planning to the revised criteria rather than using legacy checklists uncritically.
- Practise the new Paper 3 timing at HL when official specimen materials are available.
How BTT will version the IB Mathematics library
BTT keeps the durable Mathematics separate from the dated examination layer. The existing IB Mathematics AA and IB Mathematics AI routes remain the subject owners. This page is the version-control owner for the 2027 teaching / 2029 assessment transition.
Topic knowledge should continue to route into the Mathematics Knowledge Warehouse; board-specific assessment changes should route through the Mathematics Examination Tools & Reference hub.
Current-source note
Checked 26 September 2026. The International Baccalaureate states that the revised Diploma Programme Mathematics courses begin first teaching in August 2027 and first assessment in May 2029. The current courses have their final assessment in November 2028. IB’s official update pages list the content reductions, reduced paper marks, the one-hour HL Paper 3, and the revised common IA criteria described above.
Official references: IB Mathematics: Analysis and Approaches updates and IB Mathematics: Applications and Interpretation updates.
World Mathematics route: World Mathematics Atlas · Examination Tools & Reference · World Mathematics Examinations · IB Mathematics AA · IB Mathematics AI.