Built on official documents and checked by real teachers — not a chatbot’s guess.
Students write on paper as always; how you set and invigilate the exam stays the same. The official criteria are built in — you just drop a whole class of scripts into the room. School standards are optional.
Choose one of 13 HKDSE subjects or 12 IB assessments. Its official marking criteria are built in — nothing to upload.
Criteria built inPDF, Word or photos of handwritten scripts — select many at once, one file per student. School standards optional.
~20–40s per scriptEvery mark has evidence and a confidence value. Safe scripts are filed by the criteria; the rest form a review queue. Export in one click.
Excel · PDF · CSVFrom bulk upload and evidence-backed scoring to the review queue and export — every step follows how teachers actually mark.
Drop a class scan or per-student photos in at once, matched to student numbers — no opening files one by one.
For each rule in the criteria: met or not, which line is the evidence, and how confident. Checkable, not a guess.
25 assessments across HKDSE and IB, built from official past papers and marking criteria — nothing to upload.
Upload your school’s own standards and, wherever they differ, they take precedence over the official criteria. Not required.
Only low-confidence, borderline or hard-to-read scripts reach you; the rest are filed by the criteria. You see only the exceptions.
Per-question scores, per-student comments, and a class-wide weak-spot breakdown — export to Excel/PDF/CSV at once.
For every rule in the marking criteria, it shows met-or-not, which line is the evidence, and how confident it is. What you get is a checkable marking record, not just a number.
Response (extract)
Marking criteria
Evidence: identifies the rise in cost. [L3]
Evidence: explains the price may rise. [L5]
Reason: no concrete example.
Safe scripts are filed by the criteria. Only the low-confidence, borderline, or hard-to-read ones form a queue and reach you. When it isn’t sure, it doesn’t award a mark on its own.
Never awards a mark when it isn’t sure
Every one is built on official past papers and official marking criteria, and its accuracy is validated against their own marking by serving teachers before release. Local and international curricula, one platform.
HKDSE · 香港中學文憑試core & popular electives
IB Diploma Programmebuilt on official IB assessment criteria
Uploads are used only to mark, and are handled under the Hong Kong Personal Data (Privacy) Ordinance. No login, no account.
Free Teacher AI Toolkit
Hong Kong schools are pushing AI, but many teachers do not need jargon. They need safe, copyable, time-saving uses for everyday work: lesson prep, differentiated worksheets, follow-up after marking, parent messages and speaking practice.
No prompt-engineering course. Paste one practical prompt into the AI tool you already have, then edit it.
Use AI first for planning, rewriting, differentiation and feedback drafts; anonymise sensitive data.
Turn common errors into next-lesson reteaching tasks, correction questions and group work.
Any Hong Kong secondary teacher can use it right away and share it with the department. When a school wants it across all teachers, we quote a batch licence.
Mark your own classes and share it with your school — completely free.
All teachers, no fair-use cap, plus on-site setup, dedicated support and teacher training.
Criteva is a marking platform for Hong Kong secondary teachers. The official marking criteria for 13 HKDSE subjects and 12 IB assessments are built in — you upload the student scripts and each answer is scored item by item against the criteria, with a verbatim evidence quote and a confidence value for every mark. Scripts that need a second look are collected into a review queue for you. Calibrated on 1,000+ official past papers and validated by serving teachers against their own marking; about 20–40 seconds per script, roughly 20 minutes for a class.
Both. HKDSE (13 subjects): Chinese Language, English Language, Mathematics and Citizenship & Social Development, plus Biology, Chemistry, Physics, Economics, Geography, History, BAFS, Chinese History and Mathematics (Extended Part M1). IB (12 assessments): Extended Essay, TOK Essay, English & Chinese A Language & Literature Paper 1, History Paper 2, Economics Paper 1, Physics, Chemistry, Biology, Mathematics AA, Mathematics AI and Business Management. Each is built on official past papers and official marking criteria, validated by serving teachers before release.
Free for individual teachers — try it, mark your own classes, and share it with your school. For a school-wide licence (all teachers, no fair-use cap), email david@serenio.ai or fill in the quotation form.
No — school marking standards are optional. Without them, marking follows the official criteria; upload them (PDF, Word or photo) and wherever they differ from the official criteria, your school’s version takes precedence.
Marking is strictly criterion-referenced, item by item, with an evidence quote and a confidence value for every mark; uncertain scripts are collected into a review queue for you. Every assessment is accuracy-validated by serving teachers against their own marking before release — and the teacher is always the final decision-maker.
So that every teacher can get through, the free tier has fair-use limits: up to 50 PDFs per IP per day and 50 pages per PDF. A typical class of 30–40 scripts fits comfortably within a day. School batch licences are exempt.
Uploaded papers, marking standards and student scripts are never shared and never used to train any public model, and are handled under the Hong Kong Personal Data (Privacy) Ordinance. No login or account is needed — uploads are processed transiently and cleared within 24 hours.
LMS integration is to be introduced to the public soon — importing class rosters and assignments, and syncing grades back with one click. For now you can export to Excel/CSV and import into your existing school system.
Criteria built in, no setup. Marked by the official criteria on the spot; the result is yours to decide. Free for individual teachers.
HKDSE & IB · no login, no credit card · school licences: david@serenio.ai