A test measures you.
Ritsu teaches you.
Drop in the exam or test paper. Ritsu pulls out every question — in your language — and gives you three ways through each one: solve it and get graded, see the worked solution, or be walked to the answer without it ever being handed over. Then it draws out what each question was really testing.
The grade isn't the lesson
You got the grade back. You never got the lesson.
A score tells you how much you missed. It never tells you what — or why, or how to get it right next time. That's the part that actually matters, and it's the part no exam ever hands back.
The test comes back with a number on it. Maybe some red marks. You see where you lost points, feel the small drop in your stomach, and put it in a drawer. That's what happens to almost every graded paper.
But a wrong answer marked in red is a verdict, not an explanation. It tells you that you missed question 7 — not the step you skipped, not the idea you never quite had, not how to make sure the next version of question 7 goes differently. The grade measured you. It didn't teach you — and the one thing worth having from a test is exactly the thing a test is not built to give.
There's a better use for that paper than the drawer: don't just read the score. Work back through it.
The workflow
Every question, three ways — and the lesson underneath each one.
01 · Drop in the paper
Drop in the paper
The exam or test, as a PDF or DOCX. Ritsu reads the whole thing and pulls out every question — numbered exactly as the paper had them, nothing skipped.
In your language
A paper in English you’d rather work in Vietnamese? The reverse? Ritsu carries every question over verbatim — every symbol, every number, in order — so the language is never the thing standing between you and the question.
Just show me
/solve --mode=showOut of time? Ritsu reveals the full worked solution — with the reasoning and three takeaways — so even the fast path leaves you something. This is the answer key, done properly.
Let me try, then grade me
/solve --mode=diyWrite your answer and Ritsu grades it — not just right/wrong, but where your reasoning broke and how to fix it. Exactly the feedback the red mark never gave you.
Walk me to it
/solve --mode=guidedThe one no answer key offers. Ritsu breaks the question into milestones and leads you through them — you produce each step, it tells you if your approach works, and the answer only appears once you’ve reached it yourself.
What it was testing
Every solution ends with what the question was really checking — the intuition, the lesson, where it shows up again. The part a score never tells you.
A test gave you a number. This gives you the paper back — every question understood, in your language, in whatever depth you needed.
Pedagogy, packaged
Solving the question is one command. Owning the concept is six.
Solving one question proves you can do it once. These six make sure you can do it again when it counts — each asking more of you than the last.
Understand
The core idea first, then the layers — built from the paper you just dropped in.
Recall
Retrieval practice: the most proven way to make it stick. Pull it back out, cold.
Drill
The parts that have to be automatic, turned into cards you'll actually run.
Explain back
The Feynman test. Say it in your own words — that's where the gaps show.
Apply
A real problem on the real concept. Knowing it and using it aren't the same.
Create
Write it out in full. The highest bar there is: if you can write it, it's yours.
It writes a fresh question on the same concept — so “I solved the exam question” extends into “now do one I haven't seen”, the only proof that survives to the real exam.
That's Bloom's taxonomy, climbed one command at a time. And the science isn't a slogan — it's a flag on the command:
/quiz --bloom="auto"
40+ commands, all built like this.
Knowledge Map
You always know exactly where you stand.
A grade is one number for a whole paper. It buries which topics you own and which you scraped through. Ritsu scores every concept the exam tested, so a 7/10 becomes a list — these you've got, these will catch you again.
Every concept, scored.
Not 7/10 for the paper — a mastery score per concept it tested.
Dim = it'll catch you again.
The topics you only scraped through, named — so you fix those before the real thing.
The whole paper, decompressed.
One grade, opened up into exactly what you know and what you don't.
Spaced review
Fix it now. Still have it fixed on the real exam.
The gap this test found will close for a few days, then quietly reopen — Ebbinghaus measured the fade in 1885. Ritsu brings each corrected concept back right before it goes, so what you fixed today is still fixed when the exam that counts arrives.
Five minutes tonight. Three tomorrow. Two in three days.
Built from your exam — no cards to make.
When you're stuck
The moments you actually get stuck — and what to type.
Paste your attempt. Ritsu grades where your reasoning broke — the explanation the mark never gave you, on your actual work, not a generic solution.
every ✗ resolved — the lesson it always contained
Stop filing away tests. Start learning from them.
Free forever · no card