Understand the difference. Make it stick.
Authors of Thieme’s A-WIN review · Academic hospitalists
See the clues that decide each answer, with physician-written explanations, comparison tables, next-step algorithms and images. Then spaced review and your exam-day plan bring it back right up to test day.
Biostatistics is live. Cardiology is next.
Founding offer: the first 500 students who get every chapter free as it’s released.
Your exam-day plan
Set your exam date, and every review is planned to land before it.
- 1
A daily target that updates as you go
Your answer attempts to go, divided by the study days left. A miss raises it and right answers lower it; it’s worked out again after every answer.
- 2
Reviews that tighten as the exam nears
Gaps grow as a question earns stars, but never past half the study days left, so close to the exam reviews come every few days.
- 3
A final check, weakest first
Before the exam every question comes back once, the ones you know least first. Then 4 days for fixing what you miss, and the last 2 days before the exam are yours to rest.
- 4
“Needs refresh” flags
Miss a mastered question and it’s flagged and back the next day. Two sure, right answers make it mastered again.
Illustrative example, not real user data.
Use Pradis alongside your Qbank: work through the confusing distinctions, then come back to them until they stick.
What you learn with
Understand the differences
Most questions turn on telling apart similar choices. Side-by-side tables show what separates them.
Remember the hard parts
Mnemonics, tables and flowcharts that make complex material easier to recall.
Learn what’s current
Each chapter is reviewed against current US guidelines before release.
How spaced review works
Every question you answer goes into your review schedule automatically. Here’s what happens next.
- Answer a question. Tap Submit and see the explanation. If you got it right but weren’t really sure, tick “I wasn’t really sure”.
- Earn three stars. A sure, correct answer at a scheduled review earns a star: your first answer, 5 days later, and about 3 weeks after that (sooner when your exam is close). Three stars and the question is mastered. In table questions, each row earns its own stars.
- Miss it, and it comes back. A wrong answer starts the question over and brings it back tomorrow. A correct “not sure” answer earns no star and comes back in 2 days. There’s no penalty for being honest.
- Review what’s due. Your review list shows today’s questions, up to your daily limit (30 to start, and you can change it). Done early? Keep going with the rest that’s due, or study tomorrow’s reviews a day ahead; both count. Answering a question early anywhere else doesn’t earn a star.
- Get one reminder. If reviews pile up and you haven’t studied for a day, we send one short email. Never more than one a day, and you can turn them off in one click.
- Set your exam date. Reviews are spaced to fit before it. Mastered questions come back now and then to stay fresh, and before the exam a final check brings your questions back, weakest first. The last 2 days before your exam are kept free.
First answer · 5 days later · About 3 weeks after that
Three stars mark a review milestone, not exam readiness. If you miss a mastered question later, it’s marked ‘Needs refresh’ and comes back for two quick checks.
One plan. Everything you need to study smarter.
Free now, plus 12 months after launch
Limited to the first 500 members who claim a spot. No card needed. Every chapter is yours free as it’s released. When the last chapter is out (that’s launch), your free year starts. After that, $25/month.
- Every chapter as it’s released, with an explanation for each question
- Tables, flowcharts and mnemonics built for the exam format
- Spaced review to three stars, planned around your exam date
- A reminder email if reviews pile up, at most one a day
- Progress by chapter and topic: mastered, needs refresh and due today
- Each chapter reviewed against current US guidelines before release
Not sure yet? Practice Biostatistics free, no account needed.
Every chapter, as it is released.
We aim to release a new chapter every two weeks after review. 1 of 25 chapters is live.
Available
- BiostatisticsLive since Oct 12, 2026
Next
- CardiologyNext
Planned
- PulmonologyPlanned
- GastroenterologyPlanned
- NephrologyPlanned
- Acid Base DisordersPlanned
- Infectious DiseasePlanned
- EndocrinologyPlanned
- HematologyPlanned
- Preventive MedicinePlanned
- NeurologyPlanned
- RheumatologyPlanned
- Allergy and ImmunologyPlanned
- DermatologyPlanned
- Emergency MedicinePlanned
- OphthalmologyPlanned
- Ear, Nose and ThroatPlanned
- EthicsPlanned
- Disorders of Sexual DevelopmentPlanned
- ObstetricsPlanned
- GynecologyPlanned
- Male ReproductionPlanned
- PediatricsPlanned
- PsychiatryPlanned
- General SurgeryPlanned
Meet our team
Medicine is an art. Learn it like one.
Manoj Gurung, MD
Co-author of A-WIN and creator of Pradis
Assistant Professor of Medicine, Warren Alpert Medical School of Brown University
Academic hospitalist, Kent Hospital, Rhode Island
Yayra Musabek, MD
Co-author of A-WIN and creator of Pradis
Assistant Professor of Medicine, Warren Alpert Medical School of Brown University
Academic hospitalist, Kent Hospital, Rhode Island
The book behind Pradis: a compact Step 2 CK review
The authors wrote A-WIN as a short, practical review for Step 2 CK. It leans on comparison tables, flowcharts and mnemonics to make similar conditions easier to tell apart, and it comes with a digital copy on medone.thieme.com.
The book contains about 600 tables, flowcharts and mnemonics.
What readers say about A-WIN
…the use of tables is very beneficial in these chapters. It allows the reader to easily compare and contrast differing pathologies, and seeing important differences in presentations, labs, etc.…Anita S. · Medical student · review of the book
…Important and highly tested points are emphasized, pathologies are easy to compare and contrast, and a clear emphasis on diagnostic workup and appropriate treatment is evident.…Tyler S. · Medical student · review of the book
Frequently asked questions
What is the founding member offer?
Free now, plus 12 months after launch. The first 500 students who claim a founding spot before launch get every chapter free as it’s released. The free year starts at launch, the day the last chapter goes live. Signing in alone doesn’t claim a spot: sign in with Google, then tap “Claim a founding spot” under Pricing on this page. No card is needed. If you tick “Email me when a new chapter goes live”, we’ll email you as each one is released. After your free year the plan is $25/month.
Does this replace my Qbank?
No. Use your Qbank to practice the exam, and Pradis to work through the confusing distinctions and come back to them.
How does spaced review work?
Every question you answer comes back on a schedule. Answer it right and sure at three scheduled reviews (your first answer, 5 days later, about 3 weeks after that, or sooner when your exam is close) and it’s mastered. Miss it, and it comes back tomorrow.
What does “I wasn’t really sure” do?
After a correct answer, you can tick it to tell Pradis you guessed. You still see the explanation, the question earns no star and comes back in 2 days, and it costs you nothing.
What do three stars mean?
You answered right, without guessing, at three scheduled reviews. Mastered questions still come back now and then, and a later miss marks the question “Needs refresh.”
Will you email me?
A short reminder if reviews pile up while you’re away, plus the occasional progress update. Never more than one a day, and you can turn them off in one click.
Does every question come back before my exam?
A final check brings back your questions in the weeks before your exam, weakest first, and finishes before your last 2 days, which are kept free. It starts earlier if you study several chapters, and if it can’t all fit, Pradis tells you what’s left.
Is it Step 2 CK only?
Yes. Pradis is written for USMLE Step 2 CK and the clinical shelf exams.
Can I try it before I pay?
Yes. Biostatistics is free for everyone, no account needed. Sign in to save your progress.
Who writes the content?
Manoj Gurung, MD and Yayra Musabek, MD, academic hospitalists and the authors of the Thieme A-WIN review book.
Get in touch
Send us a question or feedback. We’ll get back to you soon.
Portions of Pradis are adapted from Thieme Review for the USMLE: A WIN for Step 2 and 3 CK (Thieme, 2021) by Manoj Gurung, MD, and Yayra Musabek, MD, used with permission.
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