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IB Maths AA vs AI: which course should you choose?

IB Mathematics Analysis and Approaches (AA) vs Applications and Interpretation (AI): the differences in syllabus, exam structure and university requirements, with guidance by student profile.

IB Courses Academic Team2 min read

Since 2019, IB Mathematics has been offered as two courses: Analysis and Approaches (AA) and Applications and Interpretation (AI), each at HL and SL. This is one of the highest-stakes decisions in the Diploma Programme because it shapes both the two-year experience and which university courses will accept you. This guide compares the two by syllabus, exam structure and university requirements. For one-to-one help see IB Maths tutoring.

The core difference: algebra vs application

AA is the "pure maths" pathway: algebraic manipulation, proof, trigonometry and deep calculus. It includes a non-calculator paper and suits students who enjoy abstraction and long algebraic chains. AI is the modelling and data pathway: statistics, probability, financial maths, graph theory (HL) and technology-driven solutions. Every AI paper uses a GDC; it measures the ability to build mathematics in real-world contexts.

Exam structure

  • AA HL: Paper 1 (no GDC), Paper 2 (GDC), Paper 3 (extended problem solving) + IA. The heaviest maths option.
  • AA SL: Paper 1 (no GDC) + Paper 2 (GDC) + IA.
  • AI HL: Papers 1-3 all with GDC + IA; statistics and modelling heavy.
  • AI SL: Papers 1-2 with GDC + IA; the lightest computational load of the four.

In both courses the Internal Assessment (the Exploration) is worth 20% of the grade.

University requirements: the key constraint

  • Engineering, physics, mathematics: most selective universities require or strongly prefer AA HL.
  • Economics: LSE and similar prefer AA HL; many good programmes accept AA SL / AI HL.
  • Business, social sciences, psychology: AI HL or AA/AI SL is usually sufficient, and AI's statistics focus is often more useful.
  • Medicine: most programmes look at Chemistry/Biology HL rather than maths level; AA SL or AI SL is typically fine.

The rule of thumb: if your target degree is calculation-heavy choose AA; if it is data-heavy choose AI; when unsure, AA keeps the most doors open.

Choosing by student profile

  • Comfortable with algebra, enjoys proof, STEM-bound → AA HL
  • STEM-bound but maths is not the strongest area → AA SL (plus HL sciences)
  • Economics/business-bound, strong with statistics → AI HL
  • Social sciences/arts-bound, minimising maths load → AI SL

Frequently asked questions

Is AI easier than AA?
Only AI SL is genuinely lighter. AI HL is often underestimated — its statistics depth and modelling questions make a 7 hard. The right course is the one matching your natural strengths, not the "easier" label.
Can I switch between AA and AI later?
A switch is realistic only in the first months of DP1, while the syllabuses still overlap. After that the content gap makes it very difficult.
How do the old Maths HL/SL courses map across?
Roughly: old Maths HL ≈ AA HL, Maths SL ≈ AA SL, and Maths Studies ≈ AI SL. Universities use this mapping in their equivalency tables.

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