Slides skip the details.
Ritsu helps you master them.
Ritsu reads every slide, walks you back through the reasoning each bullet skipped,
and turns any concept into personalized, interactive practice in seconds —
until you can produce the reasoning yourself, without the deck.
The missing middle
You're not failing the slide. You're failing what it left out.
A deck keeps the conclusions and drops the reasoning — and you can't re-read your way to something that was never written down.
Slide 14 says “therefore ” and moves on. It looks finished. It's clean, it's what the professor put on the screen, and it's right there in front of you — so you read it again.
In the lecture, that one word — therefore — took four minutes and a whiteboard. In the deck it takes one bullet, and the four minutes are gone. You're not failing the slide. You're failing what it left out — and you cannot re-read your way to something that was never written down.
There's only one way out: stop staring at the conclusion. Go back and rebuild the step.
The workflow
From slides you can read to reasoning you can produce.
01 · Drop in the deck
Drop in the deck
Your lecture slides. That's the only manual step.
/derive — rebuild the step between the slides
Slide 13 sets up. Slide 14 concludes. Ritsu walks the space between them — each step with the reason it's licensed, not just the algebra. Then it stops, hands you the pivotal one, and waits.
/prereq — the thing it assumed you'd seen
Often, “I don't get slide 14” means “I never really got slide 6 of a different lecture.” Ritsu names what's missing — in learning order — before you lose a weekend to the symptom.
/expand — the bullet doing all the work
“Regularisation prevents overfitting” is six words hiding a whole idea. Ritsu opens it exactly where the deck went thin — and nowhere else.
A penalty on large weights keeps the model from memorising the training set — it has to find the pattern instead.
Smaller weights → a smoother function → answers that still hold on data it has never seen.
opened where the deck went thin — and nowhere else
Every concept in the deck, mapped
That was one slide. Ritsu did it for the whole deck — every concept, wired in the order they build on, each one scored as you work.
Keep it past the forgetting curve
Ritsu brings each concept back right before you'd forget it. Master the deck today, still own it on exam day.
Pedagogy, packaged
Every command packs a proven learning method.
You've got the reasoning back. Six commands take it from “I can follow it” to “I can write it from memory” — each one asking more of you than the last.
Understand
The core idea first, then the layers — built from your deck, not from the internet.
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.
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 deck's slide count tells you nothing about how much there is to learn. Ritsu scores every Point of Knowledge as you work — the dim ones are exactly what you haven't got yet, so you never have to guess what to study next.
Every concept, scored.
Not one vague % for the deck — a mastery score per Point of Knowledge.
Dim = what will bite you.
The concepts you haven't got yet, named. That's the list nobody else gives you.
The whole deck, one screen.
No more guessing what to study next — the map tells you.
Spaced review
Master it today. Still have it on exam day.
You forget most of what you learn within days — Ebbinghaus measured it in 1885. Ritsu brings each concept back right before it fades, so the work you did today is still there when it counts.
Five minutes tonight. Three tomorrow. Two in three days.
Built from your deck — no cards to make.
When you're stuck
The moments you actually get stuck — and what to type.
/derive — Ritsu shows you where it came from — each step with the reason it's licensed. Then it hands you one to try, so it's yours and not just read.
Stop re-reading. Start producing.
Free forever · no card