Stop revising what
you already know.
Upload your own chapter, notes or photos of the board. StudyWorld turns them into practice, works out which ideas you keep getting wrong, and keeps bringing those back until they stick.
- Free to start, no card
- Your material is never used to train models
- First questions ready in under a minute
The lac operon is fully switched on when…
- lactose is present
- lactose is present and glucose is absent
- glucose is present
Why that was wrong
Lactose alone lifts the repressor, but the operon only runs fully when glucose is low — that is what raises cAMP and lets CAP bind. Two conditions, not one.
From your material: Chapter 3 — Regulation in prokaryotes
A real question, from a real chapter — and what happens when you get it wrong.
- from upload to your first question
- < 60sfrom upload to your first question
- kinds of exercise, chosen to fit your material
- 25kinds of exercise, chosen to fit your material
- more practice on the ideas you keep missing
- 3×more practice on the ideas you keep missing
- questions invented from material you did not upload
- 0questions invented from material you did not upload
How it works
Four steps, about a minute of your attention
Nothing to set up, no deck to build, no tagging. Upload the chapter you were going to re-read anyway.
- 01
Upload what you are studying
A PDF, a photo of the board, a page of your own notes. Anything you would otherwise be reading.
- 02
It reads the whole thing
Every idea in the chapter is found and named — not the headings, the things you can actually be tested on.
- 03
Practise what you keep missing
Questions built only from your material. Get one wrong and the same idea comes back in a different shape.
- 04
Walk in knowing where you stand
A score per topic that reflects what you can do today, and a practice exam over exactly what is being examined.
Adaptive learning
It pays attention to what you get wrong.
Most study apps show you every card the same number of times. This one keeps a score for each idea in your material and spends your time where the score is low.
Asked again, asked differently
Get something wrong and it comes back — as an example, a consequence, the relationship reversed. Rephrasing the same question only teaches you the phrasing.
Weak topics come first
Every session opens on the ideas furthest from mastered, so the fifteen minutes you have go where they change the most.
Never beyond your material
A true fact you were never taught is still the wrong question. If the chapter covers three tenses, nothing here will test a fourth.
Mastery, last two weeks
- Photosynthesis44% → 82%
- Energy conversion21% → 58%
- ATP63% → 91%
Your exam topic list, checked
- Transcription and translation12 questions ready
- The lac operon8 questions ready
- Epigenetics and the Hunger Winterwriting 8 questions
- CRISPR-Cas9not in anything you uploaded
One thing on your list is not in anything you have uploaded. Nothing is invented for it — add your notes and check again.
Exam readiness
Find the gap two weeks early, not in the exam hall.
Your teacher hands out a list of what the exam covers. Upload it. StudyWorld checks every item on that list against what you have actually got, and tells you plainly which ones you have nothing for.
It will not paper over a gap.
When your list names something your material does not contain, nothing is invented for it. You are told to go and find your notes — which is the useful answer, and the one most study tools will not give you.
When you get it wrong
A reason, not a red cross
The moment you get something wrong is the moment you are most able to learn it. That is the moment this product spends its effort on.
Why that answer was wrong
Two or three sentences on what the right answer rests on, and which misunderstanding the one you picked comes from.
Where to look it up
Every question names the part of your own chapter it came from, so you can go back and read the paragraph rather than guess.
The chapter in plain language
Any material can be rewritten in short, ordinary sentences — the version you wish the textbook had, kept beside the original.
For parents
See that it is going well, without reading over a shoulder.
Your child makes a code and gives it to you. You see how much has been practised, which subjects are moving, and which topics are still hard — enough to ask a good question at dinner.
You will not see their answers.
Not which questions they got wrong, not what they typed. That is deliberate: a learner who knows every mistake is forwarded starts answering safely instead of honestly, and this whole thing only works because it gets to watch them be wrong.
They can withdraw access at any time, from their own settings.
Sophie
76 questions this week · 3 sessions
- French68%
- Biology41%
Still finding hard: Lac operon, Epigenetics
Pricing
Start free. Upgrade when it has earned it.
The free plan is not a countdown. It is enough material to get through a couple of chapters and decide whether this way of studying suits you.
Free
€0forever
No card, no trial ending on a Tuesday you forgot about.
- 50 pages of material a month
- Every kind of exercise
- Adaptive practice and mastery tracking
- A Biology demo, ready to try
StudyWorld Plus
€9.99a month
Cancel whenever. Nothing is deleted when you do — your progress stays exactly where it is.
- Everything in Free, with room to actually use it
- 600 pages of new material a month
- Practice exams from your teacher's topic list
- Gap analysis — what your material does not cover
- Adaptive practice on every weak topic
- Plain-language summaries of any chapter
- Parent access, if you want it
You are not asked for a card to begin.
Questions
The things people ask first
Only from the material you upload. If your chapter covers three tenses, nothing here will test a fourth — a true fact you were never taught is still the wrong question, because you get marked down for something nobody gave you.
Something else on your mind? hallo@studyworld.app
Find out what you don’t know yet.
Upload one chapter. In under a minute you will be answering questions built from it, and you will know which ideas are not there yet.
- No card required
- Cancel any time
- Your material stays yours