Examiner

A grading product for IB Economics essays that marks like an examiner, not a chatbot: the official markbands and score caps are enforced in code, and any grade that doesn't add up is rejected and re-run. Students upload an essay and get a band-by-band breakdown with every point tied to a quote from their own writing — for about three cents a grade.

Highlights

• Rubric as code: markbands, AO weightings and the mark scheme's hard caps are injected verbatim and enforced outside the model
• Deterministic pre-checks for diagrams, definitions and command terms run before the model is called, cutting hallucination and cost
• Zod validation rejects any grade whose total doesn't equal its parts and retries; Deep Analysis grades twice and flags disagreement
• Annotated essay view, PDF and Word upload, and on-demand Level 4 exemplars tailored to each student's gaps
• Stateless share links and a bring-your-own-key mode, so a grade costs ~$0.03 — or nothing