Two ways in
Be the learner
Take a short practice sequence in either subject. A few minutes, no sign-in, nothing to install.
See how a lesson is madeBe the author
Follow a supplied text and recording through structuring, question writing, review, and publication — then open the result as a learner.
The two subjects
Language fluency
Practises language forms, retrieval, and production: choosing the right form, producing it under a constraint, getting a fact out of a short recording, and saying a line aloud.
SubjectConcept fluency
Practises distinctions, relationships, application, qualification, and explanation: telling an accurate restatement from a near neighbour, reconstructing a proposed sequence, and explaining an idea in your own words.
How a lesson gets made
Nothing here is generated on the fly. The path from source to practice is the same in both subjects, and every step is something a person did and could change:
- a source — a short text, a short recording, or both;
- the source split into reviewable blocks that keep their provenance;
- what a learner should become able to do;
- a small, balanced set of questions, each tied to the block that supports it;
- editorial review, then publication;
- practice, feedback, and a suggested area to go back to.
What this demo is honest about
The content here is written for the demonstration: the Japanese lesson is original material with original synthesized audio, and the concept lesson uses a deliberately invented subject so that nothing on this site asserts a claim about the world. No question is graded by a language model. Written and listening questions are checked against an answer key; a spoken answer is compared with accepted readings by your own browser; an explanation is not machine-judged at all — you assess it against the author's criteria.
Nothing you type is used to train anything, and there is no account, no email, and no tracking across sites.