A CBSE student has one board exam cycle to plan around. An IB, IGCSE, or A-Level student is usually juggling several moving parts at once — Internal Assessments, an Extended Essay, coursework deadlines, sometimes staggered exam sessions — and generic “start SAT prep in Grade 11” advice tends to ignore all of it. Slot prep into the wrong window and it either competes with the highest-stakes academic work of the year, or gets quietly abandoned when a coursework deadline wins.
The fix isn’t more hours. It’s sequencing prep around each curriculum’s actual load pattern — see the full curriculum-by-curriculum timing breakdown for the comparison at a glance.
IB Students: The Squeeze Is Grade 12, Not Grade 11
The IB Diploma’s second year is where everything lands at once — Internal Assessments across up to six subjects, the Extended Essay, Theory of Knowledge, and the run-up to May finals. Grade 12 has very little genuine slack.
Grade 11 — before IA deadlines start stacking — is the realistic window. Ideally, a first diagnostic mock happens near the start of Grade 11, with serious prep wrapping before IA season fully takes over early in Grade 12.
On content: IB Math AA and AI students usually bring a solid algebra and functions foundation that transfers well to SAT Math. The gap is rarely knowledge — it’s pace. IB rewards depth and multi-step reasoning across fewer problems; the SAT rewards speed across many shorter, more varied ones. That shift in rhythm, not the underlying math, is what usually needs the most deliberate practice.
IGCSE Students: The Hidden Window Is the Summer After
IGCSE exams typically wrap by May or June, whether a student is heading into A-Levels or the IB Diploma next. The six-to-ten weeks right after results — before the next two-year program’s coursework and internal deadlines begin — is often the most genuinely open stretch a student will see for the next two years. No IAs, no coursework, no board exam pressure.
It closes fast once term starts. If your child is currently working through IGCSEs, that post-results window is worth protecting deliberately for a first serious SAT push, rather than assuming “there’ll be time during A-Levels or IB” — that later window is smaller than it looks from outside the calendar.
A-Level Students: Watch the Content Gap, Not Just the Calendar
A-Level’s defining feature is depth over breadth — most students take three subjects, occasionally four. A student doing Physics, Chemistry, and Further Maths has likely had less recent, less broad exposure to some SAT Math domains — certain data analysis and algebra topic variety in particular — than a student coming from a curriculum with compulsory general math through the final year.
This isn’t a competence issue. It’s a recency-and-breadth gap, and it’s straightforward to close — but only if it’s diagnosed early, rather than discovered midway through a compressed prep timeline.
Calendar-wise, the squeeze pattern mirrors the IB: the final year fills up fast with coursework and exam preparation, so the earlier year (Lower Sixth / Year 12) is the more realistic prep window.
The General Principle: Sequence Matters More Than Hours
The same total number of prep hours produces very different results depending on when in the curriculum calendar they land. Prep that overlaps with IA deadlines, mock board exams, or coursework crunch periods gets rushed or dropped — not from lack of discipline, but because the calendar genuinely has no room that month.
- Map your child’s exact subject combination and its specific IA/EE/coursework deadlines first
- Identify the genuine open windows in that calendar — don’t assume “5 months until applications” means 5 months of usable prep time
- Run a diagnostic mock before committing to a schedule, so the plan is built on real data, not a guess
- Front-load prep into the earlier year of any two-year program (Grade 11 for IB, Year 12 for A-Level)
The practical move: map your child’s specific curriculum’s high-load periods first — their exact subject combination, their IA and coursework deadlines — and work backward from there to find the real open windows. Starting instead from “we have five months until applications are due” and assuming prep can run continuously across that stretch is where most derailed prep plans start.
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Get a Free Diagnostic →Curriculum structures (IB, IGCSE, A-Level) referenced here reflect general program patterns as of 2026 and can vary by school and exam board. Confirm specific IA, coursework, and exam session dates with your school.