Parent guide
A 4-minute read for parents who want to help without becoming a maths teacher themselves. The five IGCSE topics that genuinely bridge to IB, a direct link to Pre-IB warm-up practice, and — for later — an honest AA vs AI comparison for when the DP course choice arrives.
Most Year 11 students think "I've finished IGCSE, I'll pick things up in September." They won't. IB assumes fluency in five specific areas from Day 1 — if these aren't automatic, the first six weeks of DP1 are painful. In priority order:
If your child still has to "think about" whether to multiply both sides or subtract first, they'll drown in IB algebra. Non-negotiable for both AA and AI.
Bridges to → SL/HL AA Unit 1, all AI modelling questionsFactorising, completing the square, and the quadratic formula. IB won't tell them which to use — they need to see the equation and pick the fastest route in under 30 seconds.
Bridges to → AA Unit 2 (Functions), AI Unit 2 (Modelling)The foundation of calculus (AA) and regression (AI). If linear equations aren't second nature, differentiation and correlation coefficients will feel abstract.
Bridges to → AA Unit 5 (Calculus), AI Unit 4 (Stats)Both courses build heavily on this in DP1 term 1 — non-right-angled trig (AA) and 3D vectors (HL AA). Rusty basics = shaky IB grades.
Bridges to → AA Unit 3, HL AA Unit 3 (Vectors)The single most common IA topic in AI is financial modelling. Even AA students hit this in probability. Fluency here saves 15+ minutes on Paper 2.
Bridges to → AI Unit 1 (Number), IA topics across all coursesUnit 0 is free and covers the GCSE / IGCSE / MYP skills every DP Maths course assumes. Your child can start in 30 seconds, with no card needed.
Start Unit 0 (free) Then the free 5-minute check shows their weakest DP topics and gives them a plan.You don't need to understand the maths to see the progress. Here's what your child gets, and what keeps you in the loop without nagging.
Pass this guide on — it takes ten seconds and could save them the October panic.
Once your child moves from IGCSE into DP1, they'll pick one of four IB Maths courses. Both AA and AI count as IB Diploma Maths and are respected by universities — but they're genuinely different subjects, and picking the wrong one is the single most common regret I see in October of DP1.
| Analysis & Approaches (AA) | Applications & Interpretation (AI) | |
|---|---|---|
| Best-fit student | Enjoys the "how does this work" side of maths. Comfortable with algebra and proofs. | Prefers "where would I use this" — data, modelling, real-world scenarios. |
| Weekly homework feel | Algebra manipulation, calculus techniques, trig identities. | Reading questions, modelling with tech (calculators), interpreting results. |
| Calculator use | Paper 1 is no-calculator. Students must be fluent by hand. | Calculator allowed in every paper. Fluency with the GDC is essential. |
| Typical university target | STEM degrees, economics, engineering, medicine at competitive UK/US universities. | Business, psychology, social sciences, humanities with a quantitative element. |
| Common misconception | "AA is the harder one" — not necessarily. It's harder if you don't like algebra. | "AI is the easy option" — false. The modelling questions in HL AI are conceptually harder than most SL AA topics. |
| If in doubt, pick… | AA if your child enjoyed IGCSE algebra and got a solid 7-8. | AI if your child preferred IGCSE statistics/data and found pure algebra a chore. |
Note on universities: some competitive STEM courses (Oxford Maths, Imperial Engineering, most US Ivy STEM) require or strongly prefer HL AA. If your child is targeting one of these, check the specific course page above — or read the full Parent's Playbook for a university-by-university table.