About Ribn

The gap

There is no shortage of platforms that will assign a worksheet and count who finished it. What there is not, anywhere in the UK market, is one that marks maths and science properly: units, significant figures, algebraic equivalence, balanced equations, drawn graphs, method marks and error carried forward. Nor one with genuinely interactive diagrams in homework.

The engines that solve most of this exist and are open source, but they sit inside a free university site that forbids teacher authoring, or inside a self-hosted system with no polish. Nobody has put a real marking engine, teacher authoring with an approval gate, and a UK exam board workflow into one product.

What we are trying to be correct about

A teacher abandons a tool permanently the first time it contains a wrong answer key or an off-specification question. Ninety seconds saved against permanent distrust is a terrible trade, so the engineering is weighted accordingly.

• Marking is deterministic and runs on the server. The browser never holds a key or a verdict, and the same pure code runs in tests, on the server, and in the demonstration on the front page.
• A model never decides anything. It may draft wording and plausible wrong answers. It never writes an answer key, a mark, a diagnosis or a release decision.
• Nothing reaches a pupil without a teacher approving it. That is a hard gate with an audit record, not a setting somebody can turn off.
• One wrong answer is a signal, not a diagnosis. A finding needs several distinct exposures, and the denominator is always on screen.

Where the build has got to

This is the honest position, and it is the section that gets kept current.

• Working, and on this site. The marking you can try on the front page. Four questions across physics, chemistry, algebra and graphs, each marked by real rules against a declared mark scheme, in your browser, on whatever you type.
• Built. The design system the product is made of, with its accessibility and colour contrast checks running on every change.
• In progress. The assessment engine, the question schema, and the database with its tenant isolation.
• Not built yet. The signed-in product: authoring, assigning, the pupil sitting surface and results. There is nothing to sign into, which is why there is no sign-in link on this site.

What we will not do

No streaks, badges, leaderboards or daily-return prompts. No pupil ranking. No open chat for pupils. No pupil self-registration. No pupil data sent to a model provider, and none used for training. Those are on the front page because they are product decisions, not small print.