Start with the maths work
Provide homework, a past paper or any other maths work within the supported levels and exam boards.
DEVELOPING WITH UK DESIGN PARTNERS
Every mark
needs a reason.
Every educator
stays in control.
Meet Delta Mark. Mark any homework, past paper or other maths work within GCSE, A Level and 11 Plus, with coverage across OCR, AQA and Edexcel. You and your teaching team can review the reasoning behind every provisional mark.
For tutors, tutoring centres, test-prep organisations, schools and other education providers.
In development. Educator approval always required.
DELTA MARKTHE REVIEW WORKSPACEGCSE MATHEMATICS · HIGHER
Look beyond the answer.
04 Solve 3(2x − 1) = 15[3 marks]
6x − 3 = 156x = 18 Ax = 3
ILLUSTRATIVE WORKED EXAMPLE
Working linked to the mark
Adds 3 to both sides to give 6x = 18.
PROVISIONAL MARK3 / 3
Awaiting tutor review
The final decision is yours.Approve, adjust or escalate.
Product concept · illustrative marks, not evaluated results
MATHEMATICS MARKING
GCSE · A Level · 11 Plus
OCR · AQA · Edexcel
Our subjects
- Mathematics — available
- Statistics — available
- Biology Coming soon
- Chemistry Coming soon
- Physics Coming soon
01 / THE WORKFLOW
Support with the marking.
Ownership of the decision.
Bring homework, past papers and other maths work into one review workflow, with provisional marks and supporting evidence for you or your teaching team to check.
See the reasoning
Review provisional marks linked to the student’s working, with confidence indicators and uncertainty made explicit.
Make the final call
The tutor or teacher approves, adjusts or escalates each decision. Delta Mark does not assign final marks or post grades.
TIME BACK FOR TEACHING
Less time marking.
More time with learners.
Compare marking from scratch with reviewing evidence-linked provisional marks. See what a change in marking time could mean for your workload.
Your marking workload
Use the same batch of homework, past papers or other maths work for both sides of the comparison.
ILLUSTRATIVE WEEKLY COMPARISON
Manual marking3h
Marking each piece from scratch.
With Delta Mark1h
Estimated setup, review and approval.
Potential educator time saved per week2h67% less hands-on marking time
Time you could put towards learner feedback, lesson preparation or individual support.
Illustration, not a measured result or guarantee. The starting manual estimate uses the reference example of 50 papers in 3 hours. One minute of review per piece and 10 minutes of setup are editable assumptions, not measured Delta Mark performance. Actual savings depend on the work and review required. AI processing time is excluded; this estimates educator time, not total turnaround.
02 / BUILT FOR REVIEW
A mark is only useful
if you can check it.
We’re designing Delta Mark around the questions an educator actually asks: where did that mark come from, and what needs a closer look?
Evidence first.
Educator judgement throughout.
Evidence, next to the decision
Trace a provisional mark back to the relevant part of the student’s submission.
Uncertainty that stays visible
Confidence and abstention are part of the design. When the system cannot make a supported judgement, it should flag the question for review.
Reliability measured in practice
The pilot will evaluate agreement with independent expert marking, tutor acceptance and review time. Accuracy and time savings are not yet proven.
03 / TWO WAYS TO WORK WITH US
One specialist capability.
Built into your way of working.
Meet Delta Mark.
A simple web application for tutors and teaching teams across tutoring centres, test-prep organisations, schools and other education providers to review homework, past papers and any other maths work within the supported levels and exam boards. No agent framework or developer tools required.
- Per-script and per-class review
- Evidence-linked provisional marks
- Mandatory educator approval
Build on the capability.
Explore the same hosted assessment capability through a defined, versioned contract for your product’s integration.
assess_student_submission()Planned structured output: provisional marks, evidence pointers, confidence and abstention.
Discuss a technical partnership
Built by Delta Flow Labs. We’re a UK B2B technology company building hosted professional capabilities for AI agents. Our marking system supports GCSE, A Level and 11 Plus Mathematics, with OCR, AQA and Edexcel coverage.
04 / A FEW GOOD QUESTIONS
Clear scope.
Clear expectations.
Is Delta Mark available now?
Delta Mark is in development. We’re welcoming tutors, tutoring centres, test-prep organisations, schools and other education providers, alongside a smaller group of technical EdTech design partners to help shape and evaluate the pilot.
Who is Delta Mark for?
Delta Mark is for individual tutors, tutoring centres, test-prep organisations, schools and other education providers. Whether you teach independently or work as part of a teaching team, you can review provisional marks for homework, past papers and other maths work within the supported levels and exam boards.
What maths work can Delta Mark mark?
Delta Mark can mark any homework, past paper or other maths work within the supported levels and exam boards: GCSE and A Level Mathematics across OCR, AQA and Edexcel, as well as 11 Plus Mathematics. Every mark remains provisional until reviewed by a tutor or teacher.
Does the AI decide the final mark?
No. Outputs are provisional. A tutor or teacher must approve, adjust or escalate the decisions. The service does not post official grades, message students or replace educator judgement.
What will a design partnership involve?
We’ll discuss your marking workflow, agree a bounded pilot scope and evaluation approach, and define responsibilities before work begins. Technical partners will also help validate the integration contract.
How will pricing work?
The planned model combines an annual platform minimum with an included assessment allowance and volume pricing above it. Pilot terms are agreed directly; public per-call pricing will follow cost and willingness-to-pay evidence. There is no free tier planned.
How will student data be handled?
Data handling, access, retention and responsibilities will be agreed as part of pilot scoping before learner data is used. Please don’t send student scripts or personal data through the enquiry or booking process.
DESIGN PARTNER ENQUIRIES
Help us build
a better way
to review the work.
Are you a tutor, running a tutoring centre, or part of a test-prep organisation, school or another education provider? Building an EdTech product? Let’s talk about your marking workflow and whether a design partnership is a fit.
Book a discovery callA conversation with Delta Flow Labs.
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