A strong MRCPCH revision stack pairs a paediatric-specific question bank with an adaptive layer that targets the high-stakes domains and rebuilds the safe-child reasoning the exam turns on. PassPaeds and Pastest give paediatric bank coverage and exam-style practice; iatroX adds adaptive sequencing across the curriculum and a Socratic tutor built around the question of what makes a given child unsafe. The three written papers — Foundation of Practice, Theory and Science, and Applied Knowledge in Practice — escalate in depth, so the stack has to serve breadth and depth in proportion to which paper you are sitting.
Dividing the labour
Use PassPaeds, a well-regarded paediatric-specific bank, and Pastest for paediatric bank coverage and exam-style blocks, with BMJ OnExamination as additional exposure and the RCPCH's own resources for curriculum alignment. Use iatroX for the adaptive layer: the engine sequences blocks around your weak paediatric domains and re-presents errors at spaced intervals, so the high-frequency but easily-forgotten material — developmental milestones, safeguarding, neonatal emergencies, weight-based prescribing — stays warm rather than fading between sessions.
A worked run through the loop
The loop converts question practice into safer reasoning. Suppose a PassPaeds block on neonatology exposes shaky knowledge of the management of a sick neonate, and you guess a question on a developmental concern. Reading the explanations and moving on leaves both as recognition rather than retrieval. Instead, take the misses into an iatroX adaptive block, where the engine also surfaces adjacent gaps — safeguarding red flags, say, or a rash you would struggle to recognise — and the Socratic Tutor asks what makes this child unsafe and what the safe next step is, rather than naming the answer. For weight-based prescribing in particular, working the reasoning beats memorising a number you will misremember under pressure. The concepts then return at spaced intervals, and the recurring gaps close.
Where iatroX comes in
iatroX is positioned as the adaptive, safety-focused layer beside PassPaeds and Pastest, not as a replacement. The engine targets your weak paediatric domains and keeps milestones, safeguarding and dosing facts warm through spaced repetition, which directly addresses the areas candidates most often forget. The Socratic Tutor is built for the question paediatric exams hinge on — what makes this child unsafe, and what should happen next — which trains judgement rather than recall. Ask iatroX settles a current guideline point from a sourced corpus when a management miss reflected drift rather than understanding.
Matching effort to the paper
The three written papers reward different work, and a stack that ignores the difference wastes effort. Foundation of Practice is the broadest and earliest, sampling the whole curriculum at a level a trainee early in paediatrics should manage; here the priority is coverage and the confident handling of common presentations, and a volume bank with a review loop serves it well. Theory and Science goes deeper into the basic and clinical sciences, so mechanism and the why behind a decision matter more, and tutor-led reasoning earns its place. Applied Knowledge in Practice is the most clinically demanding, with longer, integrated scenarios that test application across subspecialties; here adaptive targeting of weak domains and safe-child reasoning matter most, because the questions punish recognition without judgement. A common mistake is preparing for all three with an undifferentiated grind of questions, which over-serves whichever paper suits your habits and under-serves the others. Look at the blueprint for the paper you are sitting, weight your time toward the domains it emphasises and the ones your diagnostic flags as weak, and shift the balance between breadth and depth accordingly. The same resources can serve all three papers; what changes is how you point them, and matching that to the paper in front of you turns broad effort into a targeted plan.
When you don't need the full stack
Not every candidate needs multiple banks. If PassPaeds or Pastest, used with a disciplined review loop, is keeping your performance comfortably above the standard for the paper you are sitting, adding more fragments your time. The honest test is your performance across the domains, not the number of resources. Match the depth of your stack to the paper — breadth for Foundation of Practice, depth for Applied Knowledge in Practice — and run a leaner setup if your diagnosis points that way.
Questions worth answering
Which paper am I best preparing for? Match the stack to the paper — Foundation rewards breadth, Applied Knowledge rewards subspecialty depth, and your result should steer the balance.
What domains are most often under-revised? Developmental milestones, safeguarding, neonatal emergencies and weight-based prescribing — high-frequency and easy to forget.
How should I handle weight-based prescribing? By working the reasoning rather than memorising figures, so you can derive a safe dose under pressure.
Is the Clinical exam the same preparation? No — the Clinical exam is a separate practical assessment with its own approach.