Using AI to support teachers in marking, portfolio management and moderation for Key Stage 2
Teacher-led, AI-assisted portfolio assessment and moderation with consistent judgements over time.

At a glance
Discovery · Fractional CTO
90%+
AI feedback accuracy, piloting the MVP with a number of schools across England.
- Client
- EdTech founders
- Stage
- Proof-of-concept to MVP
- Scope
- Discovery, MVP, fractional CTO
- Outcome
- SEIS ready, product in-market
Embeddable worked with Assessable to evaluate an existing proof-of-concept, move to MVP and launch into commercial partnerships with a number of primary schools.
The project
AI-assisted handwriting marking and moderation that is accurate and efficient, and can be safely procured by schools.
Assessable set out to create a product that is accurate and efficient, whilst still keeping teachers in control of marking and feedback of their pupils.
- Teachers invest a significant amount of time in marking and portfolio management, but speed isn’t the primary concern. An AI that takes time but is accurate is much more valuable.
- The teacher remains in the driving seat, where AI pupil feedback is provided for review and subsequently edited or approved by a teacher.
- Governance and data protection are critical to protect the information of young people.
Key results
Successful Pilot
Assessable successfully piloted the MVP with a number of schools across England, attaining over 90% AI feedback accuracy.
Agile Team
Assessable now has a multi-discipline team onboard, with rigorous governance processes in place to keep the business digitally secure.
Investment Ready
With SEIS in place, product in-market, and schools onboard, Assessable are well placed to open their latest investment round.
The discovery
Our discovery process reviewed the state and results of the previously built proof-of-concept, working with the founding team and other stakeholders to scope the subsequent MVP – a move away from a no-code build, to a bespoke, agentic platform.
Working alongside specialists in UX and AI architecture, Embeddable developed a costed, time-bound scope and oversaw the development of the new platform, whilst also leading on the implementation of the UI layer and the foundations of the businesses data governance requirements.
- Decoupled AI, API and front-end layers
- Interactive assessment framework and moderation folders
- Upload photographs of handwritten work from any device
- Security aligned with expectations of schools and public sector authorities
The results
Working with the Assessable team and other stakeholders, the MVP was delivered on time and on budget, subsequently launching as a pilot with a number of schools across England.
We subsequently engaged as the fractional CTO for Assessable to lead on technology scaling, and continue to work with the team today.
- Successfully pilot with primary schools across England
- SEIS ready and product in-market
- Robust data governance and security practices in place
Summary
Assessable: MVP, Pilots, Product Launch
We helped the founders of Assessable take the insight from their proof-of-concept and translate that into a fully-fledged AI product that’s been piloted and procured by schools across England.
Got an idea? Let’s see if we can do the same for you.
Services in this engagement
More for
FoundersTesting an idea of your own?
We’ll help you turn it into a clear, fundable plan.

