Every PSLE Alex question passes four independent checks before your child sees it. Here's the whole process.
Where the questions come from
- Expert-authored seeds — the foundation, hand-written to the MOE syllabus, one per skill and difficulty. These are the reference and never get auto-edited.
- Practice variants — each seed is expanded into fresh variants that test the same skill a different way, so your child isn't redoing the same 200 questions. A variant is built from the pedagogy of the seed — the skill, the trap, the difficulty — not by copying its wording.
That's roughly 7,100 questions feeding 60 full prelim-format mock papers across Math, Science and English (Chinese is in beta).
The four checks
- Structural check — enforced at the database. Four options keyed (1)(2)(3)(4), the correct answer must be one of them, every diagram must be renderable. A malformed question is rejected on write.
- Similarity check — a variant too close to an existing one is blocked, so you don't get near-duplicates.
- Continuous audit — the whole bank is re-scanned automatically; any violation blocks a release.
- Blind solve-test — a separate solver, given only what your child would see, has to actually answer it. If agreement isn't essentially unanimous or anything is ambiguous, the question is re-authored in place.
Structural checks prove a question is well-formed; the blind solve-test proves it's answerable. Both have to pass.
Reported questions and syllabus changes
Report a bad question in the app and it enters the same loop — re-authored in place, re-checked, shipped. And the bank tracks the current syllabus: Speed is no longer tested in PSLE 2026 Math, so those questions are coming out of the live bank rather than wasting your child's time.
See what's live and what's next on the PSLE Alex 2026 roadmap.
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