This workflow is for FACEM trainees who already subscribe to PrimeX and keep returning to the same resuscitation and cardiology cases because they feel productive. It targets the written Short Answer Question (SAQ) paper and the clinical OSCE, and the principal limitation is unavoidable: a simulator only ever rehearses the scenarios you select, so an unbalanced case set builds a confident candidate with a hidden gap. The remedy is a case matrix, an unrehearsed baseline, and an unseen check you did not author yourself.
What PrimeX offers for the ACEM Fellowship right now
The table below records what PrimeX advertises for FACEM preparation. All figures are vendor-reported and were last checked on 19 July 2026; confirm the current numbers, inclusions and pricing on the PrimeX product page before you rely on them, because subscription content changes.
| Item | Vendor-reported position (19 July 2026) |
|---|---|
| Written MCQ/SCQ | An "unlimited" Fellowship-level MCQ library with full option-by-option explanations and community answer distributions; no fixed item count is published |
| Written SAQ | AI-graded SAQ practice returning tiered scores (Fail / Borderline / Pass / Distinction) with marking checklists and model answers the vendor describes as calibrated to examiner standards |
| Clinical OSCE | A timed OSCE simulator across the stated station types (4 minutes reading, 7 minutes active), covering management, communication, examination, teaching, synthesis and case-based discussion, with radiology images |
| Retrieval assets | 8,843 spaced-repetition flashcards; 268 study notes mapped one per learning objective |
| AI / adaptive | AI-graded SAQ feedback against examiner-report themes; adaptive pacing; a written-readiness score |
| Access and price | 7-day free trial; A$44.99/month; A$119.99/quarter; A$299/year; a subscription is stated to cover all PrimeX exam tracks |
The important read here is that PrimeX genuinely attempts all three FACEM components — it is not only a written bank. That is a point in its favour, and it means the risk is not missing coverage but under-sampling coverage: doing the trauma and toxicology stations far less than the cardiac ones because the cardiac ones feel rewarding.
The exam you are actually preparing for
The ACEM Fellowship written examination is two 180-minute papers, six hours in total: an SAQ paper and a Single/Select Choice Question (SCQ) paper that is MCQ only. The clinical examination is an OSCE of up to 12 stations, each 11 minutes (4 minutes reading plus 7 minutes of assessment), totalling roughly 132 minutes across two consecutive days. Station types include history, examination, communication, resuscitation discussion, teaching and case-based discussion. The whole assessment is built on the ACEM curriculum, and the curriculum — not any third-party product — is the authority on what is examinable.
Keep that distinction sharp. When PrimeX says its SAQ marking is "calibrated to examiner standards," that is a vendor claim about their marking rubric, not an ACEM endorsement. Use the ACEM curriculum and the college's published examiner reports as your ground truth, and treat every commercial resource, including this one and iatroX, as a rehearsal tool measured against that ground truth.
Step 1: Build a representative case matrix, not a comfort list
Before you sit a single case, write the matrix. The point is to force breadth across five dimensions at once, so you cannot quietly over-sample the domains you enjoy. Set a rough target share for each blueprint domain, then require that your chosen cases also spread across acuity, patient age and communication challenge.
| Blueprint domain | Target share of your set | Must also vary by |
|---|---|---|
| Cardiac / circulatory | ~15% | Acuity: critical, emergent, lower |
| Respiratory | ~12% | Age: paediatric, adult, older adult |
| Trauma / injured patient | ~12% | Complexity: single vs multi-morbidity |
| Toxicology / environmental | ~10% | Communication load |
| Neurological | ~10% | Acuity and age |
| Paediatric emergency | ~10% | Age (by definition) and complexity |
| Abdominal / gastrointestinal / renal | ~10% | Investigation-heavy vs management-heavy |
| Psychiatry / behavioural | ~8% | Communication load, capacity/consent |
| Obstetric and gynaecological | ~7% | Acuity |
| Environmental, ENT, ophthalmology, other | ~6% | Image interpretation |
The communication dimension deserves its own note, because it is the one candidates skip. Deliberately schedule stations that carry an interpersonal load: breaking bad news, disclosing an error, an interpreter-mediated history, an end-of-life discussion, a conflict with a colleague. These are exactly the stations the OSCE uses to separate candidates, and they are the least fun to rehearse cold.
Step 2: Record a cold baseline
Pick a small starter set from the matrix — say one SAQ section and two OSCE stations from domains you have under-practised — and sit them without pausing, restarting or reading the rubric first. Do not look at the marking checklist until you have finished. The purpose is to capture how you actually perform under first-attempt conditions, because that is the only version of you that resembles exam day. A baseline you tidied up mid-attempt tells you nothing.
Preserve this baseline. Save the scores, and note where you ran out of time, where you froze, and where you defaulted to a memorised script that did not fit the stem.
Step 3: Score twice and record the disagreements
Now score each case twice. First, take the PrimeX score at face value. Second, re-mark the same response yourself against the ACEM domains — or better, against a human reviewer such as a supervisor or study partner using the college's published domain descriptors. Write down every disagreement between the two marks.
The disagreements are the most valuable data you will collect. If the platform passes an SAQ answer that your human reviewer fails on clinical judgement, you have learnt that the automated score is being generous on that item type, and you should stop trusting it there. Calibrating an automated mark against a human one before you rely on it is a discipline worth building deliberately; our guide to calibrating AI-graded SAQ and OSCE feedback sets out the full method, and it applies directly to the PrimeX SAQ tier scores.
Step 4: Convert feedback into two observable behaviours
Automated feedback tends to arrive as a long list of generic improvements. Ignore the list. For the next case, extract exactly two observable behaviours you will change — behaviours an examiner could tick, not attitudes. "Be more systematic" is not observable. "State the resuscitation priority before ordering any investigation" is. "Name the disposition and the safety-net advice in every management answer" is. Two per case is enough; more than two rarely survives contact with a timed station.
Step 5: Vary deliberately, not cosmetically
When you revisit a clinical principle, change the surface features so you are rehearsing the reasoning, not a memorised answer. Take the same principle — say, the recognition and management of sepsis — and re-sit it with a different patient agenda, a different comorbidity and a different time pressure: an older adult on immunosuppression, a pregnant patient, a child with a language barrier. If your answer is materially the same across all three, you have memorised a script; if it flexes appropriately, you have learnt the principle.
The exit standard
Stop preparing a domain when three things are simultaneously true: your performance is consistent across unseen cases in that domain, not just familiar ones; your own mark and the platform's mark agree closely (calibrated feedback agreement); and there is no recurrent safety-critical omission — you are not repeatedly missing the same time-critical step. Until all three hold, more repetition of comfortable cases is not progress.
A seven-day pattern for trainees working clinically
This pattern assumes you are revising around shifts. It uses PrimeX for one defined job — rehearsing and marking Fellowship-level cases — and iatroX for a different, narrower job: keeping the underlying foundation science retrievable under time pressure. Be clear about what iatroX is here. iatroX covers the ACEM Primary examination — anatomy, physiology, pathology and pharmacology in exam-style MCQs — and it is not a Fellowship SAQ or OSCE product; it cannot mark your SAQ or run your OSCE. What it can do is measure whether the science that your Fellowship-level reasoning stands on is still fast and accurate, on unseen items you did not write. Treat any adaptive sequencing it offers as vendor-described, and judge it only by whether your unseen scores move.
- Day 1: Build or refresh the case matrix. Sit one SAQ section and two OSCE stations cold from under-practised domains. Preserve the baseline.
- Day 2: Double-score Day 1. Extract two observable behaviours per case. Sit 20 unseen ACEM Primary MCQs in iatroX on your weakest science domain (for example renal physiology if your acid-base answers were slow).
- Day 3: Two OSCE stations from a different domain (paediatric, toxicology). Review flashcards only on the day's misses.
- Day 4: One timed SAQ paper section. Then a short mixed iatroX Primary block to confirm the pharmacology underneath your management answers is retrievable.
- Day 5: Two communication-heavy stations (breaking bad news, error disclosure). Double-score against a human reviewer if you can.
- Day 6: A mixed written block under strict time — SAQ plus SCQ-style MCQs — and log every error by type, not by topic.
- Day 7: Review the week's error-type log. Sit one unseen iatroX Primary block to confirm the science holds. Set next week's domain quotas from the matrix, weighted toward whatever the log exposed.
Decision checklist: continue, supplement, switch or stop
- Continue with PrimeX as your primary Fellowship simulator if your unseen scores are rising across domains and its SAQ marking agrees with a human reviewer on your work.
- Supplement with iatroX (Primary-level unseen science) and with human-marked practice if your automated SAQ marks and human marks keep diverging, or if your foundation knowledge is the rate-limiting step.
- Switch the balance toward examiner-marked mocks and supervised OSCE practice if you are within a few weeks of the exam and your remaining gaps are interpersonal, because no software reproduces a live examiner's judgement.
- Stop buying more question access when your problem is no longer coverage but consolidation and rest — measured by a stable, calibrated unseen score, not by an unfinished bank.
Frequently asked questions
Is PrimeX enough for ACEM Fellowship on its own? For the written papers it is a strong, broad option, and unlike knowledge-only banks it also attempts the OSCE, which is a genuine advantage; but "enough on its own" overstates any single product. The OSCE is examiner-judged and interpersonal, and a simulator cannot fully reproduce a live examiner's calibrated judgement of your manner under pressure, so most candidates should pair PrimeX with human-marked practice and supervised station rehearsal.
Which ACEM Fellowship component does PrimeX not reproduce well? The live, interpersonal element of the clinical OSCE. PrimeX's OSCE simulator and AI-graded SAQ marking can rehearse structure, content and timing well, but automated marking scores what you wrote or said against a rubric — it cannot replicate the real-time judgement of an examiner responding to your tone, your handling of an upset relative, or a subtle safety lapse in the moment. Book supervised communication and resuscitation-discussion stations to cover that gap.
How many unseen PrimeX cases or stations should I preserve for final ACEM Fellowship calibration? Ring-fence a small unseen reserve you never touch during learning — a practical rule is one full SAQ section and three to four OSCE stations spread across different domains — and sit them cold in the final fortnight as a calibration check. Their only job is to tell you whether your performance transfers to material you have not seen, so their value collapses the moment you use them for revision. Keep them sealed until then.
When should I stop using PrimeX and move to mixed mocks? Move to full mixed mocks once your single-domain performance is consistent on unseen cases and your self-marking agrees with the platform's. At that point the limiting factor is usually stamina, sequencing and time management across a whole paper or a whole OSCE circuit, which single-station practice cannot train. Roughly the final three to four weeks is when most candidates should shift the weight from isolated cases to full-length, mixed, timed simulation.
How should I combine PrimeX with iatroX without duplicating practice? Give them non-overlapping jobs. PrimeX rehearses and marks Fellowship-level cases — SAQ, SCQ and OSCE — while iatroX measures whether the ACEM Primary-level foundation science underneath those cases is still retrievable, on unseen MCQs you did not author. Because iatroX is a Primary-knowledge and unseen-measurement layer and not a Fellowship SAQ or OSCE tool, the two do not compete; the two-Q-bank rule is the way to keep a second source as a clean measurement bank rather than a duplicate.
Editorial notes and references
Written by Dr Kolawole Tytler, NHS GP and founder of iatroX. Last checked 19 July 2026; PrimeX question counts, inclusions, subscription terms and prices are vendor-reported and change without notice — verify the current figures on the PrimeX product page before relying on them. Disclosure: iatroX operates a competing question bank, but for the ACEM Fellowship its role is confined to a job PrimeX's Fellowship product does not claim to be — an ACEM Primary-level foundation-knowledge and unseen-MCQ measurement layer; iatroX does not provide Fellowship SAQ marking or an OSCE simulator, and this article should not be read as implying otherwise. Corrections are welcome via the feedback route on iatrox.com.
References: ACEM curriculum and Fellowship assessment pages (acem.org.au) for the authoritative written and OSCE format; the PrimeX ACEM Fellowship product page (primexstudy.com.au) for vendor-reported features and pricing; iatroX internal references — Your Q-Bank Percentage Is Not Your Exam Score and the ACEM Primary bank landing page.